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Pro Piston Kit .015 Stbd

Mercury 3.0L 200-300Hp 1994-2008 Bore Size 3.640
Item#:
7015S
Cross Reference#:
18-4642
826266A2
826266A4
826266A5
878572A2
Manufacturer Item:
826266A4
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
99.99
Each

Rubber Damper

Kawasaki 96-06 900/1100 Carb/DI Models
Item#:
921611
Cross Reference#:
92160-3883
Manufacturer Item:
92160-3883
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
20.75
Each

Fuel Pump, Electrical

Mercury75-300 DFI 1.5L 3.0L 2003 & Up OEM
Item#:
888725
Cross Reference#:
888725T02
888725T1
Manufacturer Item:
888725T02
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
486.01
Each

Bearing, Crankshaft w/Ring

Seadoo 580 Inner Mag Side 6305N Sub
Item#:
6305NR
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
13.03
Each

O Ring, Cylinder Bore Seal

Mercury Race 2.5L V6 Not a replacement for 9772!!
Item#:
9772-1
Cross Reference#:
817574
Manufacturer Item:
817574
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
6.29
Each

Carburetor Kit

Holley 4bbl List# 80318
Item#:
98502
Cross Reference#:
18-7017
802417
9-37632
982052
982540
985052
Manufacturer Item:
985052
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
67.93
Each

Gear Set, Upper

OMC Cobra 5.7L 5.8L V8 w/21/16 Gears 1986-1993
Item#:
87825
Cross Reference#:
18-1600
22520
Manufacturer Item:
983825
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
776.00
Each

Crankshaft w/ Oil Gear

Yamaha 40-50hp Core Required or $200Fee
Item#:
6H4S-1
Manufacturer:
Pro Marine
Available:
Out of Stock
 
Heavy
Your Price:
600.78
Each

Choke Thermostat

Rochester & Mercarb 2Bbl 1975-1987
Item#:
70125
Cross Reference#:
18-7665
70125
70125A02
70125A1
8M6007367
8M6014121
9-34040
Manufacturer Item:
70125A02
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
83.69
Each

Valve Idle Air

Fits Mercruiser 3.0L 5.0L 5.7L 8.1L w/ MPI & ECM 555
Item#:
862998
Cross Reference#:
18-7701
18-7701
8M0045797
8M0181068
862998
Manufacturer Item:
8M0181068
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
123.60
Each

Gear Set, Upper

OMC Cobra 4.3L V6 w/ 21/19 Gears 1986-1993
Item#:
87812
Cross Reference#:
18-1602
22540
Manufacturer Item:
984012
Manufacturer:
Pro Marine
Available:
Out of Stock
Your Price:
910.99
Each

Pro Marine Thermostat Assembly Yamaha 6CE-12411-00-00

Pro Marine Thermostat Assembly

Aftermarket Yamaha 4.2L V6 Thermostat

This Pro Marine thermostat assembly is an aftermarket replacement for Yamaha OEM part number 6CE-12411-00-00 and Mercury cross reference 8M6012799.

The thermostat regulates engine cooling system temperature to help maintain proper engine operating temperature, fuel efficiency, corrosion protection, and reliable engine performance.

Compatible Applications

Engine Range Engine Type System Application Notes
Yamaha F225 / LF225 4.2L FourStroke V6 Cooling System Select models using thermostat 6CE-12411-00-00
Yamaha F250 / LF250 4.2L FourStroke V6 Cooling System Select offshore and standard rotation applications
Yamaha F300 / LF300 4.2L FourStroke V6 Cooling System Used in compatible offshore cooling systems
Yamaha VF250 V MAX SHO 4.2L Cooling System Select SHO cooling system applications


Fitment Note: This thermostat is used in Yamaha 4.2L V6 FourStroke cooling systems including many offshore, LF counter-rotation, and VF SHO applications.

Mercury OEM number 8M6012799 cross references this Yamaha thermostat for compatible Mercury-branded Yamaha powerhead applications.

Always verify your model number, serial number, and cooling system diagram before ordering thermostats and cooling system components.

OEM Part Numbers & Cross References

Brand / Type Part Number
Pro Marine 6CE-12411P
Replaces Yamaha OEM 6CE-12411-00-00
Replaces Mercury OEM 8M6012799
Alternate Search Format 6CE124110000

OEM and EMP Alternatives

What This Thermostat is Used For

This thermostat is used in compatible Yamaha and Mercury FourStroke cooling systems to regulate engine operating temperature.

The thermostat controls coolant flow through the engine to help the engine warm up properly and maintain consistent operating temperature.

A faulty thermostat may contribute to overheating, improper engine temperature, poor fuel efficiency, or excessive engine wear.

Replacing worn thermostats during cooling system maintenance helps maintain reliable engine performance and cooling system operation.

Key Features and Benefits

  • Pro Marine aftermarket thermostat assembly
  • Replaces Yamaha thermostat 6CE-12411-00-00
  • Fits select Yamaha F225, F250, F300, LF-series, and VF250 models
  • Designed for Yamaha 4.2L V6 cooling systems
  • Helps maintain proper engine operating temperature
  • Supports cooling system performance and engine efficiency
  • Aftermarket alternative to OEM Yamaha thermostat

Thermostat Details

  • Brand: Pro Marine
  • Part Type: Thermostat Assembly
  • Pro Marine Part Number: 6CE-12411P
  • Replaces OEM: Yamaha 6CE-12411-00-00
  • Mercury Cross Reference: 8M6012799
  • Application: Yamaha 4.2L V6 Cooling Systems
  • System: Cooling System
  • Use: Engine temperature regulation
  • Quantity Sold: Each

FAQ

What does Pro Marine 6CE-12411P replace?
This thermostat replaces Yamaha OEM thermostat 6CE-12411-00-00 and Mercury thermostat 8M6012799.

What engines does this thermostat fit?
This thermostat fits select Yamaha F225, F250, F300, LF-series, and VF250 4.2L V6 outboards.

What does this thermostat do?
It regulates engine cooling system temperature and coolant flow.

Can a bad thermostat cause overheating?
Yes. A faulty thermostat may restrict coolant flow or prevent proper engine temperature regulation.

Is this an OEM Yamaha thermostat?
No. This is a Pro Marine aftermarket replacement thermostat.

Are OEM and EMP versions available?
Yes. OEM Yamaha and EMP replacement versions are also available.

Should I verify fitment before ordering?
Yes. Yamaha used multiple thermostat configurations depending on model and production range.

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.
  • Cooling system components should be installed only after confirming correct fitment.
  • Items must be new, unused, and in original packaging.
  • Return authorization is required before sending items back.

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

Searchable Terms

6CE-12411P, 6CE-12411-00-00, 8M6012799, Pro Marine thermostat, Yamaha thermostat, Yamaha 4.2 thermostat, Yamaha F225 thermostat, Yamaha F250 thermostat, Yamaha F300 thermostat, Yamaha LF250 thermostat, Yamaha LF300 thermostat, Yamaha VF250 thermostat, Mercury thermostat, Mercury 8M6012799, offshore thermostat, cooling system thermostat, FourStroke thermostat

Item#:
6CE-12411P
Cross Reference#:
18-3524
6CE-12411-00-00
8M6012799
Manufacturer Item:
6CE-12411-00-00
Manufacturer:
Pro Marine
Available:
In Stock
Your Price:
37.07
Each
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