Z6_GHK6HJC0OG6S20Q8HU3K6R0G63
Z7_GHK6HJC0OG6S20Q8HU3K6R0GM5
0 Items
Z7_GHK6HJC0OG6S20Q8HU3K6R0GM7
Z7_GHK6HJC0OG6S20Q8HU3K6R0Q22
Home  >  Outboard  >  Mercury Outboard  >  Electrical System | Mercury Outboard  >  Switches | Mercury Outboard
|◀ ◀ 13 - 18 of 18 ▶ ▶|
View:

Mercury 4000 Side Mount Trim Switch Harness - 18286P

Pro Marine Power Trim Switch Replaces Mercury 18286A43

Pro Marine Mercury Remote Control Power Trim Switch

Mercury 4000 Side Mount Trim Switch and Harness - 18286P

Pro Marine 18286P is an aftermarket replacement power trim and tilt switch with harness for compatible Mercury remote controls, including the 4000 Side Mount Power Trim control.

This switch replaces Mercury OEM part number 18286A43 and previous Mercury numbers 18286A26, 18286A2 and 16991A1.

Pro Marine also stocks the genuine Mercury OEM 18286A43 Switch/Harness Assembly for customers who prefer the factory Mercury version.

Pro Marine 18286P Switch/Harness Assembly

Part Type: Power Trim and Tilt Switch / Harness
Manufacturer: Pro Marine
OEM or Aftermarket: Aftermarket
Primary Application: Mercury 4000 Side Mount Power Trim Control
Control Application: 1994-Present
Replaces OEM #: 18286A43
Pro Marine Item #: 18286P

Compatible Applications

Pro Marine 18286P replaces the trim switch and harness used in the following applications identified in the supplied Mercury catalog fitment.

Application Years Fitment Details
Mercury 4000 Side Mount Control 1994-Present Side Mount Remote Control with Power Trim
Mercury Amanzi 320 Hypalon RIB 2004-2006 Remote Control Components
Mercury Amanzi 380 Hypalon RIB 2004-2006 Remote Control Components
Important Fitment Note

This switch is selected by the Mercury remote-control configuration, not simply by engine horsepower or model.

The supplied Mercury application information identifies this switch with the 4000 Side Mount Power Trim control from 1994-Present.

Before ordering, inspect your remote control and confirm that the original switch crosses to 18286A43, 18286A26, 18286A2 or 16991A1.

OEM and Cross Reference Numbers

Mercury has used several part numbers for this switch and harness assembly. Current OEM number 18286A43 supersedes the earlier numbers listed below.

Brand / Type Part Number Status
Pro Marine 18286P Aftermarket Replacement
Mercury OEM 18286A43 Current OEM Number
Mercury OEM 18286A26 Superseded
Mercury OEM 18286A2 Superseded
Mercury OEM 16991A1 Superseded

Mercury OEM Version Available

Mercury OEM Switch/Harness Assembly - 18286A43

Prefer the genuine factory component? Pro Marine also stocks Mercury Marine OEM 18286A43 for the same switch application.

Choose between the Pro Marine 18286P aftermarket replacement and the genuine Mercury OEM 18286A43.

View Mercury OEM Switch/Harness

What This Part is Used For

This switch is installed in a compatible Mercury remote-control handle and allows the operator to control the engine's power trim and tilt system directly from the throttle/control handle.

Pressing the switch in one direction commands the trim/tilt system upward, while pressing it in the opposite direction commands the system downward. The attached harness connects the switch to the remote-control wiring.

This lets the operator adjust engine trim while underway or raise and lower the engine as required without moving away from the control handle.

Common Signs of a Worn Trim Switch

A remote-control trim switch is exposed to repeated use and the marine environment. Over time, the switch or attached wiring can become worn or damaged.

Symptoms that may indicate the switch or harness needs inspection include:

  • Trim operates from the engine-mounted switch but not from the control handle
  • Intermittent trim-up or trim-down operation
  • Switch must be pressed repeatedly before the trim responds
  • One direction works while the other does not
  • Visible damage to the switch button
  • Damaged, pinched or deteriorated switch wiring
Diagnosing a Trim Problem

A trim system that does not operate from the remote-control handle does not automatically mean the trim pump or motor has failed.

If the engine trims correctly from another trim switch but not from the control handle, inspect the remote trim switch, harness, connectors and related wiring as part of the diagnosis.

Replacement Tips

  • Disconnect battery power before servicing the remote control.
  • Confirm the original switch part number whenever possible.
  • Note the routing of the existing switch harness before removal.
  • Inspect the remote-control wiring and connectors for corrosion or damage.
  • Avoid pinching the replacement harness when reassembling the control.
  • Verify both trim-up and trim-down operation after installation.
  • Follow Mercury service procedures for the specific remote control.

Key Features and Benefits

  • Pro Marine aftermarket power trim and tilt switch
  • Switch and attached harness assembly
  • Pro Marine item number 18286P
  • Replacement for Mercury OEM 18286A43
  • Replaces Mercury 18286A26
  • Replaces Mercury 18286A2
  • Replaces Mercury 16991A1
  • Fits the applicable Mercury 4000 Side Mount Power Trim control
  • Supplied fitment lists the 4000 Side Mount control from 1994-Present
  • Mercury OEM version also available from Pro Marine

FAQ

What does Pro Marine 18286P replace?
18286P replaces Mercury switch/harness assembly 18286A43 and previous Mercury numbers 18286A26, 18286A2 and 16991A1.

Is this a power trim and tilt switch?
Yes. This is the remote-control switch used to operate the engine's power trim and tilt system from the compatible Mercury control handle.

Does 18286A43 replace 18286A26?
Yes. Mercury 18286A43 is the current OEM replacement for superseded 18286A26.

Does 18286A43 replace 18286A2 and 16991A1?
Yes. Both 18286A2 and 16991A1 are earlier Mercury switch/harness numbers superseded by 18286A43.

Does this fit the Mercury 4000 Side Mount control?
Yes. The supplied Mercury fitment identifies this switch with the 4000 Side Mount Power Trim control from 1994-Present.

Does this fit by engine horsepower?
This part is primarily identified by the remote-control assembly, rather than engine horsepower alone. Verify the control style and original switch number before ordering.

Does the switch include the harness?
Yes. 18286P is a switch and harness assembly.

Do you carry the genuine Mercury version?
Yes. Pro Marine also stocks the Mercury OEM 18286A43 Switch/Harness Assembly .

Dealer Discounts & Store Policies

Dealer / Marine Industry Discounts

Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.

Apply for a Dealer Account

Shipping Policy

  • Free shipping on orders over $100 continental U.S.
  • Orders ship via UPS, USPS, and FedEx.
  • Orders received before 5:30 PM EST ship the same business day.
  • Typical delivery time is 1-5 business days.

30-Day Return Policy

  • Returns accepted within 30 days of delivery.
  • Parts must be new, unused, and in original packaging.
  • Installed parts are not returnable.
  • Return authorization is required before sending items back.

Need help with a return or order question?
Contact Us
Phone: 941-721-3000

Searchable Part Numbers

18286P, 18286A43, 87-18286A43, 18286A26, 87-18286A26, 18286A2, 87-18286A2, 16991A1, 87-16991A1

Searchable Terms

Mercury trim switch, Mercury tilt switch, Mercury power trim switch, Mercury remote control trim switch, Mercury switch harness, Mercury 4000 trim switch, Mercury 4000 side mount trim switch, Mercury throttle handle trim switch, Mercury control box trim switch, Mercury remote trim switch, Mercury 18286A43 replacement, Pro Marine Mercury trim switch

Item#:
18286P
Cross Reference#:
16991A1
18286A2
18286A26
18286A43
Manufacturer Item:
18286A43
Manufacturer:
Pro Marine
Available:
In Stock
43.9500
Your Price:
37.95
Each

Mercury MerCruiser Neutral Safety Switch - 52939P

Pro Marine Shift Switch for Outboard, Verado, Pro XS and MerCruiser

Pro Marine Mercury / MerCruiser Neutral Safety Switch

Mercury MerCruiser Neutral Safety / Shift Switch - 52939P

Pro Marine 52939P is an aftermarket replacement neutral safety / shift position switch used across a wide range of Mercury Marine applications.

Applications shown in Mercury parts data include select Mercury and Mariner outboards, Verado, Pro XS, racing outboards, MerCruiser sterndrives, inboards and TowSports engines.

Cross-references Mercury / MerCruiser numbers 8M0207794, 8M0052939, 889514A01, 879150T94 and 814281A7. Because this switch appears in several different shift systems, always verify the OEM number and engine serial range before ordering.

Pro Marine 52939P Switch

Part Type: Neutral Safety / Shift Position Switch
Brand: Pro Marine
OEM or Aftermarket: Aftermarket
Applications: Mercury Outboard and MerCruiser
Outboard Families: Mercury, Mariner, Verado, Pro XS and Racing
MerCruiser Applications: Sterndrive, Inboard and TowSports
Current Mercury Reference: 8M0207794
Pro Marine Item #: 52939P

Compatible Applications

The following applications are taken from the supplied Mercury fitment information. Because this switch is used across multiple engine and shift systems, serial number is important.

Mercury / Mariner 3.0L Outboards

Model Serial Range
200 HP 3.0L0T750164 thru 0T800999; 0T801000 thru 1B417701; 1B417702 thru 1B504988; 1B504989 thru 2B528096
225 HP 3.0L0T409000 thru 0T800999; 0T801000 thru 1B417701; 1B417702 thru 1B504988; 1B504989 thru 2B528096
250 HP 3.0L0T409000 thru 0T800999; 0T801000 thru 1B417701; 1B417702 thru 1B504988; 1B504989 thru 2B528096
3.0L Marathon0T409000 thru 0T800999
3.0L SeaPro0T409000 thru 0T800999
225 HP 3.0L Marathon0T801000 thru 1B417701
225 HP 3.0L SeaPro0T801000 thru 1B417701

Mercury 3.0L DFI / Pro XS / Sport XS Applications

Model Serial Range
200 HP DFI 3.0L0T980000 thru 1B417701; 1B417702 thru 1B504988; 1B504989 thru 1B912785; 1B912786 thru 2B535571
225 HP DTS 3.0L0T599000 thru 1B417701; 1B417702 thru 1B504988; 1B504989 thru 1B964735
200 HP DTS 3.0L0T980000 thru 1B417701; 1B417702 thru 1B504988; 1B504989 thru 1B964735
200 HP Pro XS 3.0L1B504989 thru 1B912785; 1B912786 thru 2B535571
225 HP Pro XS 3.0L1B104549 thru 1B426560; 1B426561 thru 1B752546; 1B752547 thru 2B535608
250 HP Pro XS 3.0L1B752547 thru 2B535608
250 HP XS 3.0L0T615945 thru 0T818042; 0T818043 thru 0T997973; 0T997974 thru 1E000796; 1E000797 thru 1E002341; 1E002342 thru 1E051113; 1E053158 thru 1E053958
250 HP Sport XS 2.5L1E002342 thru 1E051823; 1E051824 thru 1E052994
225 HP Sport XS 2.5L1E002584 thru 1E050825
225 HP XS 2.5L1E002584 thru 1B792195
225 HP Pro XS 3.0L1B752547 thru 2B535608

Mercury Racing / Special Performance Applications

Model Serial Range
300X 3.0L Pro Max0T429940 thru 0T999587
300 HP XS 6 Cyl 3.2L1E001867 thru 1E052057; 1E052058 thru 1E053987
200 HP XS 6 Cyl 2.5L1E000797 thru 1E002110
200 HP XS 6 Cyl 2.5L ROS1E050852 thru 1E053876
200 HP XS SST 6 Cyl 2.5L1E050629 thru 1E053875
2.5XS 2.5L0T997974 thru 1E000796
JP 3.0L0T997974 thru 1E003045; 1E003046 thru 1E052824
110 Jet 2.5L1B690542 thru 1B974227
150 HP Pro XS 2.5L1B690542 thru 2B535572

Mercury V6 2.5L Applications

Model Serial Range
135 HP V6 2.5L1B227000 thru 1B417701; 1B417702 thru 1B737495
150 HP V6 2.5L1B227000 thru 1B417701; 1B417702 thru 1B580029
175 HP V6 2.5L1B227000 thru 1B417701; 1B417702 thru 1B508457

Mercury Verado Applications

Model Serial Range
135 HP EFI Verado 4 Cyl1B227000 thru 1B381711; 1B381712 thru 1B517158; 1B517159 thru 2B576734; Belgium 0P419487 thru 0P464487, 0P464488 thru 0P514868, 0P514869 thru 0P593020
150 HP EFI Verado 4 Cyl1B227000 thru 1B381711; 1B381712 thru 1B517158; 1B517159 thru 2B576734; Belgium 0P419487 thru 0P464487, 0P464488 thru 0P514868, 0P514869 thru 0P593020
175 HP EFI Verado 4 Cyl1B227000 thru 1B381711; 1B381712 thru 1B517158; 1B517159 thru 2B576734; Belgium 0P419487 thru 0P464487, 0P464488 thru 0P514868, 0P514869 thru 0P593020
200 HP Verado 4 Cyl1B517159 thru 2B576734; Belgium 0P514869 thru 0P593020
200 HP Verado 6 Cyl0T980000 thru 1B226999; 1B227000 thru 1B381711; 1B381712 thru 1B517433; 1B517434 thru 2B144122; Belgium 0P409357 thru 0P464487, 0P464488 thru 0P520552, 0P520553 thru 2B144122
225 HP Verado 6 Cyl0T980000 thru 1B226999; 1B227000 thru 1B381711; 1B381712 thru 1B517433; 1B517434 thru 2B144122; Belgium 0P409357 thru 0P464487, 0P464488 thru 0P520552, 0P520553 thru 2B144122
250 HP Verado 6 Cyl0T980000 thru 1B226999; 1B227000 thru 1B381711; 1B381712 thru 1B517433; 1B517434 thru 2B144122; Belgium 0P409357 thru 0P464487, 0P464488 thru 0P520552, 0P520553 thru 2B144122
275 HP Verado 6 Cyl0T980000 thru 1B226999; 1B227000 thru 1B381711; 1B381712 thru 1B517433; 1B517434 thru 2B144122; Belgium 0P409357 thru 0P464487, 0P464488 thru 0P520552, 0P520553 thru 2B144122
300 HP Verado 6 Cyl1B517434 thru 2B144122; Belgium 0P520553 thru 2B144122
350 HP SCi Verado1B716557 thru 2B143542
200 HP Pro Verado 6 Cyl2B034840 thru 2B144122
250 HP Pro Verado 6 Cyl1B830170 thru 2B144122
300 HP Pro Verado 6 Cyl1B830170 thru 2B144122

Mercury 75-115 HP EFI Applications

Model Serial Range
75 HP EFI1B366823 thru 2B094995
80 HP EFI1B366823 thru 2B094995; Belgium 0P459572 thru 2B094995
90 HP EFI1B366823 thru 2B094995
100 HP EFI1B366823 thru 2B094995; Belgium 0P459572 thru 2B094995
115 HP EFI1B366823 thru 2B094995

MerCruiser Sterndrive Applications

The supplied Mercury fitment also shows this switch in multiple MerCruiser Digital Throttle and Shift shift-bracket and actuator assemblies.

MerCruiser Model Serial Range Shown
496 MAG Base / H.O.0M025000 thru 0M687082/143; 0M687083/144 thru 0W059999; 0W060000 thru 0W309999; 0W310000 thru 0W649999; 0W650000 thru 1A066165; 1A066166 thru 1A350678; 1A350679 and later applications shown
5.0L MPI Alpha / Bravo0W310000 thru 0W649999; 0W650000 thru 1A299999; 1A300000 thru 1A611927; 1A611928 thru 1A623184; 1A623185 and later applications shown
5.0L MPI Alpha / Bravo EC1A300000 thru 1A611927; 1A611928 thru 1A623184; 1A623185 and later applications shown
350 MAG MPI Alpha / Bravo0W310000 thru 0W649999; 0W650000 thru 1A299999; 1A300000 thru 1A611927; 1A611928 thru 1A623184; 1A623185 and later applications shown
350 MAG MPI Horizon Alpha / Bravo0W310000 thru 0W649999; 0W650000 thru 1A299999; 1A300000 thru 1A611927; 1A611928 thru 1A623184; 1A623185 and later applications shown
350 MAG MPI Alpha / Bravo EC1A300000 thru 1A611927; 1A611928 thru 1A623184; 1A623185 and later applications shown
377 MAG MPI Bravo1A300000 thru 1A611927; 1A611928 thru 1A623184; later applications shown
377 MAG MPI Bravo EC1A343300 thru 1A611927; 1A611928 thru 1A623184; later applications shown
MX 6.2L MPI Bravo / Horizon Bravo0W310000 thru 0W649999
8.2L Mag / Mag EC Base and H.O.1A350340/478/497 thru 2A041664; 2A041665 thru 2A051740/741; 2A051742/743 and later applications shown
565 EFI0M967821 and later applications shown
5200M970122 and later applications shown
5400M970866 and later applications shown

Mercury Diesel / CMD Applications

Model Application / Serial Range
CMD QSD 2.0 ES 115 / 130 / 150 / 170Multiple sterndrive and inboard/TowSports serial ranges shown in supplied fitment
CMD QSD 2.8 ES 170 / 210 / 220 / 230Multiple sterndrive and inboard/TowSports serial ranges shown in supplied fitment
CMD QSD 4.2 ES 270 / 320 / 350Multiple sterndrive and inboard/TowSports serial ranges shown in supplied fitment
TDI 4.2L 335 MIE / MCMCMC000200 and later applications shown
TDI 4.2L 370 MIE / MCMCMC000200 and later applications shown
3.0L TDI 100 SDAll serials shown
3.0L TDI 230 SD / IBAll serials shown
3.0L TDI 260 SD / IBAll serials shown
Important Fitment Note

This switch is used in many different Mercury Marine shift systems. The engine horsepower by itself is not enough to determine fitment.

Verify your engine model, serial number and OEM switch number before ordering.

Depending on the application, Mercury parts diagrams may show this switch under throttle linkage, shift linkage, shift components, upper shift components, DTS shift brackets, shift actuators or related assemblies.

OEM and Cross Reference Numbers

Brand / Type Part Number
Pro Marine 52939P
Current Mercury Reference 8M0207794
Mercury OEM 8M0052939
Mercury OEM 889514A01
Mercury OEM 814281A7
Mercury Cross Reference 879150T94

OEM Mercury Version Available

Mercury OEM Switch - 8M0052939

Prefer the genuine Mercury version? Pro Marine USA also stocks the OEM Mercury switch for this application.

View Mercury OEM 8M0052939 Switch

What This Part is Used For

The neutral safety / shift position switch provides the engine or control system with information about the position of the shift mechanism.

In applications where it functions as the neutral safety switch, it is part of the starting-safety circuit designed to prevent the engine from being started when the shift mechanism is in gear.

Mercury also uses this switch within several mechanical and Digital Throttle and Shift (DTS) systems, which explains the wide variety of outboard, sterndrive and inboard applications shown in the fitment data.

Common Symptoms of a Faulty Neutral Safety / Shift Switch

  • Engine will not crank even though the control is in neutral
  • Intermittent no-crank condition
  • Starting issue changes when the control lever is moved slightly
  • Incorrect or inconsistent shift-position signal
  • DTS or shift-related fault after other causes have been ruled out
  • Physical damage to the switch or actuator
  • Corrosion or damaged electrical connections

These symptoms can also be caused by wiring, adjustment, control or starting-system problems. Diagnose the system before replacing the switch.

Installation and Replacement Tips

  • Disconnect battery power before servicing the shift or starting circuit.
  • Confirm the OEM switch number before removing the original part.
  • Note the position and adjustment of the original switch before removal.
  • Inspect the switch connector and wiring for corrosion or damage.
  • Check the shift linkage for excessive wear or improper adjustment.
  • Install and adjust the switch according to the applicable Mercury service procedure.
  • Verify that the engine starts only in the intended neutral position where applicable.
  • Verify proper forward, neutral and reverse operation after installation.
  • On DTS applications, follow the appropriate Mercury diagnostic and setup procedures.

Key Features and Benefits

  • Pro Marine aftermarket replacement switch
  • Fits numerous Mercury Marine shift-system applications
  • Applications include Mercury and Mariner outboards
  • Fits select Mercury Verado and Pro Verado models
  • Fits select Mercury Pro XS, XS and racing outboards
  • Fits select MerCruiser sterndrive applications
  • Fits select MerCruiser inboard and TowSports applications
  • Used in mechanical and DTS-related shift systems depending on application
  • Crosses to Mercury 8M0207794
  • Crosses to Mercury 8M0052939
  • Crosses to 889514A01, 814281A7 and 879150T94
  • Pro Marine item number 52939P

FAQ

What does Pro Marine 52939P fit?
It fits a wide range of select Mercury Marine applications including Mercury and Mariner outboards, Verado, Pro XS and racing outboards, plus numerous MerCruiser sterndrive, inboard and TowSports applications. Use the model and serial-number tables above for fitment.

Is 52939P a neutral safety switch?
Yes. It is commonly identified as a neutral safety / shift position switch. Its exact role varies with the Mercury shift system in which it is installed.

Does 52939P replace Mercury 8M0207794?
Yes. 8M0207794 is the current Mercury reference associated with this switch application.

What happened to Mercury 8M0052939?
Mercury parts data shows 8M0052939 superseded by 8M0207794.

Does this replace 889514A01?
Yes. 889514A01 is an earlier Mercury switch assembly in the verified supersession family.

Does this replace 814281A7?
Yes. 814281A7 is also an earlier Mercury switch number in the verified supersession family.

Does it fit Mercury Verado?
Yes. The supplied Mercury fitment includes numerous 135-350 HP Verado applications, including 4-cylinder, 6-cylinder and Pro Verado models. Serial number must be verified.

Does it fit Mercury Pro XS?
Yes. The supplied fitment includes several Pro XS applications, including 2.5L and 3.0L models. Refer to the model and serial ranges above.

Does it fit MerCruiser engines?
Yes. The supplied Mercury fitment includes numerous MerCruiser sterndrive and inboard applications, including 496 MAG, 5.0L MPI, 350 MAG, 377 MAG, 8.2L and several CMD / TDI diesel applications.

Can I select this switch by horsepower?
No. This switch spans many engine families and shift systems. Verify the engine model, serial number and OEM part number before ordering.

Do you also carry the genuine Mercury switch?
Yes. Pro Marine USA also stocks the Mercury OEM 8M0052939 switch .

Dealer Discounts & Store Policies

Dealer / Marine Industry Discounts

Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.

Apply for a Dealer Account

Shipping Policy

  • Free shipping on orders over $100 continental U.S.
  • Orders ship via UPS, USPS, and FedEx.
  • Orders received before 5:30 PM EST ship the same business day.
  • Typical delivery time is 1-5 business days.

30-Day Return Policy

  • Returns accepted within 30 days of delivery.
  • Parts must be new, unused, and in original packaging.
  • Installed parts are not returnable.
  • Return authorization is required before sending items back.

Need help with a return or order question?
Contact Us
Phone: 941-721-3000

Searchable Part Numbers

52939P, 8M0207794, 8M0052939, 889514A01, 814281A7, 879150T94

Searchable Terms

Mercury neutral safety switch, Mercury shift switch, Mercury shift position switch, Mercury neutral switch, Mercury outboard neutral safety switch, Mercury Pro XS shift switch, Mercury Verado shift switch, Verado neutral safety switch, Mercury 3.0L shift switch, Mercury DTS shift switch, MerCruiser neutral safety switch, MerCruiser shift switch, MerCruiser DTS switch, 8M0207794 switch, 8M0052939 switch, Pro Marine 52939P

Item#:
52939P
Cross Reference#:
8M0052939
8M0207794
814281A7
879150T94
889514A01
Manufacturer Item:
8M0207794
Manufacturer:
Pro Marine
Available:
In Stock
49.9500
Your Price:
42.95
Each

Push Switch, Momentary On

Item#:
39160
Cross Reference#:
MP39160
Manufacturer:
Sierra
Available:
In Stock
Your Price:
22.09
Each

Mercury MerCruiser OEM Neutral Safety Switch - 8M0052939

Genuine Mercury Shift Switch Superseded to 8M0207794

Genuine Mercury Marine Neutral Safety / Shift Switch

Mercury MerCruiser OEM Neutral Safety / Shift Switch - 8M0052939

Mercury Marine 8M0052939 is a genuine OEM neutral safety / shift position switch used across a wide range of Mercury outboard, Verado, Pro XS, racing and MerCruiser applications.

Mercury has superseded 8M0052939 to current OEM part number 8M0207794. The newer number is the current Mercury replacement for applications that originally called for 8M0052939.

Additional cross references include 814281A7, 889514A01 and 879150T94. Pro Marine also offers an aftermarket version for the same compatible applications.

Mercury Marine 8M0052939 Switch

Part Type: Neutral Safety / Shift Position Switch
Manufacturer: Mercury Marine
OEM or Aftermarket: Genuine OEM
Applications: Mercury Outboard and MerCruiser
Outboard Families: Mercury, Mariner, Verado, Pro XS and Racing
MerCruiser Applications: Sterndrive, Inboard and TowSports
Original OEM #: 8M0052939
Current Replacement #: 8M0207794
Mercury Supersession Notice

Mercury Marine has superseded 8M0052939 to 8M0207794.

If you order the current genuine Mercury replacement, the part may arrive under OEM number 8M0207794 and may look slightly different from an older 8M0052939 switch while serving the same specified replacement application.

Compatible Applications

Mercury 8M0052939 / 8M0207794 is used in a broad range of Mercury Marine shift systems. The supplied Mercury fitment includes outboard, Verado, Pro XS, racing, sterndrive, inboard and TowSports applications.

Because the same switch is used across several different engine and shift systems, always verify the model, serial number and OEM part number.

Mercury / Mariner 3.0L Outboards

Model Serial Range
200 HP 3.0L 0T750164 thru 0T800999; 0T801000 thru 1B417701; 1B417702 thru 1B504988; 1B504989 thru 2B528096
225 HP 3.0L 0T409000 thru 0T800999; 0T801000 thru 1B417701; 1B417702 thru 1B504988; 1B504989 thru 2B528096
250 HP 3.0L 0T409000 thru 0T800999; 0T801000 thru 1B417701; 1B417702 thru 1B504988; 1B504989 thru 2B528096
3.0L Marathon 0T409000 thru 0T800999
3.0L SeaPro 0T409000 thru 0T800999
225 HP 3.0L Marathon 0T801000 thru 1B417701
225 HP 3.0L SeaPro 0T801000 thru 1B417701

Mercury DFI, Pro XS and Sport XS Applications

Model Serial Range
200 HP DFI 3.0L 0T980000 thru 1B417701; 1B417702 thru 1B504988; 1B504989 thru 1B912785; 1B912786 thru 2B535571
225 HP DTS 3.0L 0T599000 thru 1B417701; 1B417702 thru 1B504988; 1B504989 thru 1B964735
200 HP DTS 3.0L 0T980000 thru 1B417701; 1B417702 thru 1B504988; 1B504989 thru 1B964735
200 HP Pro XS 3.0L 1B504989 thru 1B912785; 1B912786 thru 2B535571
225 HP Pro XS 3.0L 1B104549 thru 1B426560; 1B426561 thru 1B752546; 1B752547 thru 2B535608
250 HP Pro XS 3.0L 1B752547 thru 2B535608
250 HP XS 3.0L 0T615945 thru 0T818042; 0T818043 thru 0T997973; 0T997974 thru 1E000796; 1E000797 thru 1E002341; 1E002342 thru 1E051113; 1E053158 thru 1E053958
250 HP Sport XS 2.5L 1E002342 thru 1E051823; 1E051824 thru 1E052994
225 HP Sport XS 2.5L 1E002584 thru 1E050825
225 HP XS 2.5L 1E002584 thru 1B792195

Mercury Racing and Special Performance Applications

Model Serial Range
300X 3.0L Pro Max0T429940 thru 0T999587
300 HP XS 6 Cyl 3.2L1E001867 thru 1E052057; 1E052058 thru 1E053987
200 HP XS 6 Cyl 2.5L1E000797 thru 1E002110
200 HP XS 2.5L ROS1E050852 thru 1E053876
200 HP XS SST 2.5L1E050629 thru 1E053875
2.5XS 2.5L0T997974 thru 1E000796
JP 3.0L0T997974 thru 1E003045; 1E003046 thru 1E052824
110 Jet 2.5L1B690542 thru 1B974227
150 HP Pro XS 2.5L1B690542 thru 2B535572

Mercury V6 2.5L Applications

Model Serial Range
135 HP V6 2.5L1B227000 thru 1B417701; 1B417702 thru 1B737495
150 HP V6 2.5L1B227000 thru 1B417701; 1B417702 thru 1B580029
175 HP V6 2.5L1B227000 thru 1B417701; 1B417702 thru 1B508457

Mercury Verado Applications

Model Serial Range
135 HP EFI Verado 4 Cyl 1B227000 thru 1B381711; 1B381712 thru 1B517158; 1B517159 thru 2B576734; Belgium 0P419487 thru 0P464487, 0P464488 thru 0P514868, 0P514869 thru 0P593020
150 HP EFI Verado 4 Cyl 1B227000 thru 1B381711; 1B381712 thru 1B517158; 1B517159 thru 2B576734; Belgium 0P419487 thru 0P464487, 0P464488 thru 0P514868, 0P514869 thru 0P593020
175 HP EFI Verado 4 Cyl 1B227000 thru 1B381711; 1B381712 thru 1B517158; 1B517159 thru 2B576734; Belgium 0P419487 thru 0P464487, 0P464488 thru 0P514868, 0P514869 thru 0P593020
200 HP Verado 4 Cyl 1B517159 thru 2B576734; Belgium 0P514869 thru 0P593020
200 HP Verado 6 Cyl 0T980000 thru 1B226999; 1B227000 thru 1B381711; 1B381712 thru 1B517433; 1B517434 thru 2B144122; Belgium 0P409357 thru 0P464487, 0P464488 thru 0P520552, 0P520553 thru 2B144122
225 HP Verado 6 Cyl 0T980000 thru 1B226999; 1B227000 thru 1B381711; 1B381712 thru 1B517433; 1B517434 thru 2B144122; Belgium 0P409357 thru 0P464487, 0P464488 thru 0P520552, 0P520553 thru 2B144122
250 HP Verado 6 Cyl 0T980000 thru 1B226999; 1B227000 thru 1B381711; 1B381712 thru 1B517433; 1B517434 thru 2B144122; Belgium 0P409357 thru 0P464487, 0P464488 thru 0P520552, 0P520553 thru 2B144122
275 HP Verado 6 Cyl 0T980000 thru 1B226999; 1B227000 thru 1B381711; 1B381712 thru 1B517433; 1B517434 thru 2B144122; Belgium 0P409357 thru 0P464487, 0P464488 thru 0P520552, 0P520553 thru 2B144122
300 HP Verado 6 Cyl1B517434 thru 2B144122; Belgium 0P520553 thru 2B144122
350 HP SCi Verado1B716557 thru 2B143542
200 HP Pro Verado 6 Cyl2B034840 thru 2B144122
250 HP Pro Verado 6 Cyl1B830170 thru 2B144122
300 HP Pro Verado 6 Cyl1B830170 thru 2B144122

Mercury 75-115 HP EFI Applications

Model Serial Range
75 HP EFI1B366823 thru 2B094995
80 HP EFI1B366823 thru 2B094995; Belgium 0P459572 thru 2B094995
90 HP EFI1B366823 thru 2B094995
100 HP EFI1B366823 thru 2B094995; Belgium 0P459572 thru 2B094995
115 HP EFI1B366823 thru 2B094995

MerCruiser Sterndrive Applications

MerCruiser Model Serial Range Shown
496 MAG Base / H.O. 0M025000 thru 0M687082/143; 0M687083/144 thru 0W059999; 0W060000 thru 0W309999; 0W310000 thru 0W649999; 0W650000 thru 1A066165; 1A066166 thru 1A350678; later applications shown
5.0L MPI Alpha / Bravo 0W310000 thru 0W649999; 0W650000 thru 1A299999; 1A300000 thru 1A611927; 1A611928 thru 1A623184; later applications shown
5.0L MPI Alpha / Bravo EC 1A300000 thru 1A611927; 1A611928 thru 1A623184; later applications shown
350 MAG MPI Alpha / Bravo 0W310000 thru 0W649999; 0W650000 thru 1A299999; 1A300000 thru 1A611927; 1A611928 thru 1A623184; later applications shown
350 MAG MPI Horizon Alpha / Bravo 0W310000 thru 0W649999; 0W650000 thru 1A299999; 1A300000 thru 1A611927; 1A611928 thru 1A623184; later applications shown
350 MAG MPI Alpha / Bravo EC 1A300000 thru 1A611927; 1A611928 thru 1A623184; later applications shown
377 MAG MPI Bravo / Bravo EC 1A300000 / 1A343300 thru 1A611927; 1A611928 thru 1A623184; later applications shown
MX 6.2L MPI Bravo / Horizon Bravo0W310000 thru 0W649999
8.2L Mag / Mag EC Base and H.O. 1A350340/478/497 thru 2A041664; 2A041665 thru 2A051740/741; 2A051742/743 and later applications shown
565 EFI0M967821 and later applications shown
5200M970122 and later applications shown
5400M970866 and later applications shown

Mercury Diesel / CMD Applications

Model Application
CMD QSD 2.0 ES 115 / 130 / 150 / 170Select sterndrive and inboard / TowSports applications
CMD QSD 2.8 ES 170 / 210 / 220 / 230Select sterndrive and inboard / TowSports applications
CMD QSD 4.2 ES 270 / 320 / 350Select sterndrive and inboard / TowSports applications
TDI 4.2L 335 MIE / MCMCMC000200 and later applications shown
TDI 4.2L 370 MIE / MCMCMC000200 and later applications shown
3.0L TDI 100 SDAll serials shown
3.0L TDI 230 SD / IBAll serials shown
3.0L TDI 260 SD / IBAll serials shown
Important Fitment Note

This switch is used in many different Mercury Marine engine and shift systems.

Do not determine fitment by horsepower alone.

Verify your exact engine model, serial number and original OEM switch number before ordering. Depending on the application, Mercury may show this switch in throttle linkage, shift linkage, upper shift components, DTS shift brackets or shift actuator assemblies.

OEM and Cross Reference Numbers

Type Part Number Status
Mercury Marine OEM 8M0207794 Current OEM Replacement
Mercury Marine OEM 8M0052939 Superseded to 8M0207794
Mercury Marine OEM 889514A01 Previous OEM Number
Mercury Marine OEM 814281A7 Previous OEM Number
Mercury Cross Reference 879150T94 Cross Reference

Pro Marine Replacement Available

Pro Marine Neutral Safety Switch - 52939P

Pro Marine also stocks an aftermarket replacement switch for the same compatible Mercury Marine applications.

Choose between the genuine Mercury OEM switch and the Pro Marine 52939P aftermarket replacement.

View Pro Marine 52939P Neutral Safety Switch

What This Part is Used For

The neutral safety / shift position switch provides the engine or control system with information about the position of the shift mechanism.

On applications where it serves as a neutral safety switch, it is part of the starting-safety circuit that helps prevent the engine from starting while the transmission or gearcase is in gear.

Mercury also uses this switch in several mechanical and Digital Throttle and Shift (DTS) systems, which is why the same OEM switch appears in outboard, sterndrive, inboard and diesel applications.

Common Symptoms of a Neutral Safety or Shift Switch Problem

  • Engine will not crank even though the control is in neutral
  • Intermittent no-crank condition
  • Engine starts only when the control lever is moved slightly
  • Incorrect or inconsistent shift-position indication
  • DTS or shift-related fault after other causes have been eliminated
  • Physical damage to the switch or actuator
  • Corrosion or damage at the electrical connector

These symptoms can also be caused by wiring, linkage adjustment, control-box problems or other starting-system components. Diagnose the system before replacing the switch.

Installation and Replacement Tips

  • Disconnect battery power before servicing the shift or starting circuit.
  • Confirm the OEM switch number before removing the original part.
  • Note the position and adjustment of the original switch.
  • Inspect the electrical connector and wiring for corrosion or damage.
  • Inspect mechanical shift linkage for wear or improper adjustment.
  • Install and adjust the switch according to Mercury service procedures.
  • Verify proper forward, neutral and reverse operation after installation.
  • Where applicable, verify the engine starts only in neutral.
  • On DTS applications, follow the appropriate Mercury diagnostic procedure.

Key Features and Benefits

  • Genuine Mercury Marine OEM component
  • Mercury item number 8M0052939
  • Current Mercury replacement number 8M0207794
  • Fits numerous Mercury and Mariner outboard applications
  • Fits select Mercury Verado and Pro Verado models
  • Fits select Mercury Pro XS, XS and racing outboards
  • Fits select MerCruiser sterndrive applications
  • Fits select MerCruiser inboard and TowSports applications
  • Used in mechanical and DTS-related shift systems depending on application
  • Replaces earlier Mercury 889514A01 and 814281A7 numbers
  • Pro Marine aftermarket version also available

FAQ

Is 8M0052939 a genuine Mercury part?
Yes. This listing is for the genuine Mercury Marine OEM switch.

What replaced Mercury 8M0052939?
Mercury has superseded 8M0052939 to 8M0207794.

Will 8M0207794 replace 8M0052939?
Yes. 8M0207794 is the current Mercury functional replacement for 8M0052939.

Does this replace 889514A01?
Yes. 889514A01 is an earlier Mercury part number in the replacement family.

Does this replace 814281A7?
Yes. 814281A7 is also an earlier Mercury number in the replacement chain.

Does this switch fit Mercury Verado?
Yes. The supplied fitment includes many 135-350 HP Verado applications, including 4-cylinder, 6-cylinder and Pro Verado models. Verify the serial range above.

Does it fit Mercury Pro XS?
Yes. The supplied Mercury data includes multiple Pro XS applications, including 2.5L and 3.0L models.

Does 8M0052939 fit MerCruiser?
Yes. The supplied Mercury fitment includes multiple MerCruiser sterndrive, inboard and TowSports applications, including 496 MAG, 5.0L MPI, 350 MAG, 377 MAG, 8.2L and CMD / TDI diesel models.

Is this strictly a neutral safety switch?
It is commonly used as a neutral safety / shift position switch, but Mercury uses the same switch in several different mechanical and DTS shift assemblies depending on the application.

Can I determine fitment by horsepower alone?
No. This switch covers many different Mercury engine families. Verify the model, serial number and OEM part number before ordering.

Do you carry an aftermarket version?
Yes. Pro Marine also stocks the Pro Marine 52939P Neutral Safety Switch .

Dealer Discounts & Store Policies

Dealer / Marine Industry Discounts

Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.

Apply for a Dealer Account

Shipping Policy

  • Free shipping on orders over $100 continental U.S.
  • Orders ship via UPS, USPS, and FedEx.
  • Orders received before 5:30 PM EST ship the same business day.
  • Typical delivery time is 1-5 business days.

30-Day Return Policy

  • Returns accepted within 30 days of delivery.
  • Parts must be new, unused, and in original packaging.
  • Installed parts are not returnable.
  • Return authorization is required before sending items back.

Need help with a return or order question?
Contact Us
Phone: 941-721-3000

Searchable Part Numbers

8M0052939, 8M0207794, 87-8M0052939, 87-8M0207794, 889514A01, 814281A7, 879150T94

Searchable Terms

Mercury OEM neutral safety switch, Mercury neutral switch, Mercury shift switch, Mercury shift position switch, Mercury outboard neutral safety switch, Mercury Pro XS shift switch, Mercury Verado shift switch, Verado neutral safety switch, Mercury DTS shift switch, MerCruiser neutral safety switch, MerCruiser shift switch, MerCruiser DTS switch, 8M0052939 switch, 8M0207794 switch

Item#:
8M0052939
Cross Reference#:
8M0052939
8M0207794
814281A7
889514A01
Manufacturer Item:
8M0052939
Manufacturer:
Mercury Marine
Available:
In Stock
Your Price:
58.99
Each

Atlas Blinker Trim System

Will Not fit Uflex Helms Single Switch
Item#:
FT1
Manufacturer:
TH Marine
Available:
In Stock
Your Price:
135.73
Each

Atlas Blinker Trim System

Will Not fit Uflex Helms Dual Switch
This item has been discontinued and replaced by item 
Item#:
FT2
Manufacturer:
TH Marine
Available:
Out of Stock
Your Price:
224.31
Each
This item is discontinued
|◀ ◀ 13 - 18 of 18 ▶ ▶|
View: