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Mercury Outboard Parts
Shop OEM and aftermarket Mercury outboard parts for maintenance, repair, troubleshooting, and complete engine rebuild projects. Browse Mercury marine parts by system, including cooling, fuel delivery, electrical and ignition, internal engine components, lower unit parts, steering, trim, and routine service items.
Pro Marine USA carries Mercury outboard engine parts for a wide range of 2-stroke, FourStroke, EFI, Optimax, Pro XS, SeaPro, and Verado applications. Use your engine horsepower, model, serial number, or OEM part number whenever possible to confirm fitment before ordering.
Shop Mercury Outboard Parts by System
- Complete Powerheads
- Control Cables & Boxes
- Cooling System
- Cowlings & Components
- Electrical System
- Engine Oil
- Engine Rebuild Kits
- Fuel & Carburetion System
- Intake System
- Internal Engine Components
- Lower Unit Components
- Oiling System
- Paints
- Service & Oil Change Kits
- Service Manuals
- Steering Systems
- Throttle Components
- Transom & Midsection
- Trim System
- Wizard Performance Parts
Find the Correct Mercury Outboard Part
Mercury outboard parts can vary by horsepower, engine family, model year, and serial number range. If you are unsure which component fits your engine, use the OEM parts lookup to locate the original Mercury part number from an engine diagram.
Once you have the OEM part number, search Pro Marine to find available genuine Mercury and aftermarket replacement options.
Use Our OEM Parts Lookup »Common Mercury Outboard Engine Families
Pro Marine supports many Mercury outboard applications across a wide horsepower range. Always confirm the engine serial number and model information before ordering parts.
- Portable and Midrange: Mercury 2.5HP through 60HP 2-stroke and FourStroke applications
- FourStroke and EFI: common 75HP through 300HP Mercury EFI and FourStroke platforms
- Pro XS: performance-oriented Mercury Pro XS outboards across multiple engine families
- Optimax: direct-injected 2-stroke Mercury Optimax engines, commonly 75HP through 250HP
- Verado: supercharged and naturally aspirated Mercury Verado applications from 135HP through current high-horsepower platforms
- SeaPro: commercial-duty Mercury SeaPro outboards used in professional and high-hour applications
Common Mercury Outboard Repair Areas
- Overheating: inspect the water pump, impeller, thermostat, poppet valve, cooling passages, and related cooling components.
- Hard starting or rough running: inspect fuel pumps, filters, injectors or carburetors, spark plugs, coils, sensors, and intake components.
- No spark or intermittent ignition: check ignition coils, stators, switch boxes, trigger assemblies, sensors, grounds, and wiring.
- Low compression or power loss: inspect pistons, rings, cylinders, bearings, gaskets, reeds, and internal engine components.
- Lower unit noise or water intrusion: inspect seals, bearings, gears, shafts, bearing carriers, and gear lube condition.
- Trim or steering problems: inspect trim motors, pumps, hydraulic components, steering cylinders, hoses, and related rigging parts.
Why Buy Mercury Outboard Parts from Pro Marine USA?
- OEM Mercury and aftermarket replacement options for many common applications.
- Parts for maintenance, repair, engine rebuilding, lower units, electrical systems, fuel systems, steering, trim, and rigging.
- OEM diagram and part-number lookup tools to help identify the correct part before ordering.
- Dealer pricing available for qualified marine repair businesses and dealers.
- Large inventory of Mercury service parts and hard-to-find marine engine components.
- Fast weekday shipping on qualifying in-stock orders.
Frequently Asked Questions
How do I find the correct Mercury outboard part?
Use the engine horsepower, model, serial number, and year whenever available. Mercury frequently uses serial-number ranges to identify engine families, so the serial number is often the most reliable way to confirm fitment.
Can I search Mercury parts by OEM part number?
Yes. Enter the Mercury OEM part number into the Pro Marine site search to locate available OEM and aftermarket replacement options. If you do not know the part number, use the OEM parts lookup first.
Do Mercury outboard parts vary by serial number?
Yes. Many Mercury components change by serial-number range even within the same horsepower or model family. Always compare the serial range listed for the part with your engine before ordering.
Do you carry parts for Mercury Optimax and Verado engines?
Yes. Pro Marine carries parts for many Mercury Optimax, Verado, Pro XS, EFI, FourStroke, and SeaPro applications, including maintenance, fuel, electrical, cooling, internal engine, lower unit, steering, and rigging components.
Do you carry both OEM and aftermarket Mercury parts?
Yes. Pro Marine offers genuine Mercury parts along with aftermarket replacement parts for many common Mercury outboard maintenance, repair, and rebuild applications.
What Mercury outboard parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters, fuel filters, spark plugs, water pump kits, impellers, thermostats, gear lube, drain plug seals, anodes, and manufacturer-specific service kit components.
Fitment Tip: Mercury outboard parts often vary by serial-number range. Confirm your engine serial number and OEM part number whenever possible before ordering.
18-3540
19300-ZY6-003
6E5-12411-10-00
6E5-12411-20-00
6E5-12411-30-00
688-12411-00-00
688-12411-01-00
688-12411-10-00
688-12411-11-00
8M0175319
8M6010294
18-3540
19300-ZY6003
6E5-12411-10-00
6E5-12411-20-00
6E5-12411-30-00
688-12411-00-00
688-12411-01-00
688-12411-10-00
688-12411-11-00
8M0175319
8M6010294
09482-00316
09482-00359
09482-00522
5030142
765945
98079-57846
Yamaha OEM 122°F / 50°C Thermostat
Yamaha, Suzuki & Mercury 122°F / 50°C Thermostat - F12411-1
The F12411-1 Thermostat is a genuine Yamaha OEM 122°F / 50°C engine thermostat used across a surprisingly broad range of Yamaha, Suzuki and Mercury outboard applications.
Yamaha applications include select F115 four-strokes plus 200-300HP HPDI families including VZ200, VZ225, VZ250, VZ300, Z250, Z300, LZ250 and LZ300. Suzuki applications include select DF100A through DF300AP four-stroke engines. Mercury applications include select 115HP EFI outboards.
This thermostat cross references Yamaha 60V-12411-00-00 and 68V-12411-00-00, Suzuki 17670-90J20 / 17670-90J21, Sierra 18-3525, and several Mercury numbers listed below.
OEM & Cross Reference Numbers
| Brand / Type | Part Number |
|---|---|
| Pro Marine Reference | F12411 |
| Yamaha OEM | 60V-12411-00-00 |
| Yamaha OEM | 68V-12411-00-00 |
| Suzuki OEM | 17670-90J20 |
| Suzuki OEM | 17670-90J21 |
| Sierra | 18-3525 |
| Mercury OEM | 8M0175320 |
| Mercury OEM | 8M6010295 |
| Mercury OEM | 8M6013864 |
| Mercury OEM | 881429 |
Yamaha Fitment
F115 / LF115 four-stroke, VZ200, VZ225, VZ250, VZ300 HPDI, Z250 / Z300 HPDI and LZ250 / LZ300 counter-rotation HPDI applications.
| Engine Family | Verified Years / Models |
|---|---|
| Yamaha F115 Four-Stroke | 2000-Present fitment represented by F115TLRY, F115TLRZ, F115TJRA/B/C/D, F115TLRA/B/C/D, F115TXRA/B/C/D and later F115JA, F115LA, F115TJR, F115TLR, F115TXR and F115XA model families. |
| Yamaha LF115 Counter-Rotation Four-Stroke | 2000-Present fitment represented by LF115TXRY, LF115TXRZ, LF115TXRA/B/C/D, LF115TXR, LF115XA and related model families. |
| Yamaha VZ200 HPDI | Select 2005-Present VZ200TLR / VZ200RTLR applications. |
| Yamaha VZ225 HPDI | Select 2003-Present VZ225TLR and VZ225HTLR applications. |
| Yamaha VZ250 HPDI | Select 2003-Present VZ250TLR and VZ250FTLR applications. |
| Yamaha VZ300 HPDI | Select 2004-Present VZ300TLR and VZ300BTLR applications. |
| Yamaha Z250 HPDI | Select 2003-Present Z250TUR and Z250TXR applications. |
| Yamaha Z300 HPDI | Select 2004-Present Z300TUR and Z300TXR applications. |
| Yamaha LZ250 / LZ300 HPDI | Select 2003-Present counter-rotation LZ250 and LZ300 TUR / TXR applications. |
Suzuki Four-Stroke Fitment
Suzuki uses this 50°C / 122°F thermostat across numerous inline-four and larger four-stroke engine families. The supplied fitment includes the following major groups:
| Suzuki Engine Family | Verified Application Coverage |
|---|---|
| DF100A | Select DF100A / DF100AT applications from 2013 and later, including 10003F and related serial families. |
| DF115A | Select DF115A, DF115AT, DF115AST, DF115AZ and related variants from 2013 and later. |
| DF140A | Select DF140A, DF140AT and DF140AZ applications from 2013 and later. |
| DF150 / DF150AP | Select DF150, DF150AP, DF150AS, DF150AST, DF150AT and DF150AZ applications including multiple 2020-2026 model / serial families. |
| DF175 / DF175AP | Select DF175, DF175AP, DF175AT and DF175AZ applications including multiple 2020-2026 model / serial families. |
| DF200A / DF200AP | Select DF200A, DF200AP, DF200AST, DF200AT and DF200AZ applications, including 2015 and later model families. |
| DF250A / DF250AP | Select DF250A, DF250AP and DF250ATSS applications including 2013, 2015 and later serial families. |
| DF300A / DF300AP | Select DF300A and DF300AP applications including 2013, 2015 and later model / serial families. |
Mercury 115HP EFI Fitment
| Engine | Serial Range |
|---|---|
| Mercury 115HP EFI | 0T178500 thru 0T800999 |
| Mercury 115HP EFI | 0T801000 thru 1B226999 |
| Mercury 115HP EFI | 1B227000 thru 1B366822 |
Thermostats can vary within the same horsepower range and engine family. Match the engine model / serial number and confirm that the original thermostat cross references one of the OEM numbers listed above.
This thermostat has an opening temperature of approximately 122°F / 50°C.
Choose Your Thermostat
Pro Marine stocks this thermostat in multiple versions, allowing you to choose between the Yamaha OEM thermostat, the Pro Marine aftermarket version or the Suzuki OEM version.
Pro Marine F12411 122°F / 50°C Thermostat
Pro Marine aftermarket version of this 122°F / 50°C thermostat. A cost-effective replacement for compatible Yamaha, Suzuki and Mercury applications using the OEM cross references listed above.
Suzuki OEM 17670-90J21 50°C / 122°F Thermostat
Genuine Suzuki OEM version for compatible DF100A through DF300-series applications that call for Suzuki thermostat 17670-90J20 or 17670-90J21.
What This Thermostat Does
The thermostat regulates coolant flow through the engine so the powerhead can reach and maintain its intended operating temperature. When the engine is cold, the thermostat restricts cooling-water flow. As temperature rises to approximately 122°F / 50°C, the thermostat begins opening to allow additional cooling water to circulate.
Correct thermostat operation is important for engine warm-up, combustion quality, fuel management and overall cooling-system performance.
Common Signs of a Thermostat Problem
- Engine running hotter than normal
- Overheat warning or alarm
- Thermostat stuck closed and restricting cooling water
- Engine running unusually cool because the thermostat is stuck open
- Excessive deposits or corrosion around the thermostat
- Damaged thermostat spring or valve
- Thermostat fails temperature / opening test
Why Replace an Outboard Thermostat?
Marine thermostats operate continuously in raw-water cooling systems and can become affected by salt, minerals, corrosion, debris and age. A thermostat that sticks closed can restrict cooling flow, while one that remains open can prevent the engine from reaching its intended operating temperature.
Thermostats should be inspected during cooling-system service and replaced when damaged, corroded, sticking or outside the manufacturer's temperature specification.
Key Features and Benefits
- Genuine Yamaha OEM thermostat
- 122°F / 50°C temperature rating
- Fits select Yamaha F115 and LF115 four-stroke outboards
- Fits select Yamaha VZ200-VZ300 HPDI engines
- Fits select Yamaha Z250 / Z300 and LZ250 / LZ300 HPDI engines
- Fits select Suzuki DF100A-DF300AP applications
- Fits select Mercury 115HP EFI serial ranges
- Cross references Yamaha 60V-12411-00-00 and 68V-12411-00-00
- Cross references Suzuki 17670-90J20 and 17670-90J21
- Cross references Sierra 18-3525
- Cross references Mercury 8M0175320, 8M6010295, 8M6013864 and 881429
- Pro Marine aftermarket and Suzuki OEM alternatives linked above
FAQ
What temperature is this thermostat?
This thermostat is rated at approximately 122°F / 50°C.
Is F12411-1 a genuine Yamaha thermostat?
Yes. This listing is for the Yamaha OEM version.
A Pro Marine aftermarket version is linked above.
Does this fit Yamaha F115?
Yes. The supplied fitment includes numerous Yamaha F115 and LF115
four-stroke models from 2000 through later applications. Verify your
complete model number before ordering.
Does this fit Yamaha HPDI engines?
Yes. Verified fitment includes select VZ200, VZ225, VZ250, VZ300,
Z250, Z300, LZ250 and LZ300 HPDI models.
Does this fit Suzuki DF100A through DF200A?
Yes. The supplied fitment includes extensive DF100A, DF115A, DF140A,
DF150, DF175 and DF200A / AP applications.
Does this fit Suzuki DF250 and DF300?
Yes. Select DF250A / AP and DF300A / AP applications are included in
the fitment supplied above.
Does this fit Mercury 115 EFI?
Yes. Verified Mercury fitment includes 115HP EFI serial ranges
0T178500 thru 0T800999,
0T801000 thru 1B226999, and
1B227000 thru 1B366822.
What Yamaha OEM numbers does it replace?
Yamaha references include 60V-12411-00-00 and
68V-12411-00-00.
What Suzuki thermostat does this cross reference?
It cross references Suzuki 17670-90J20 and
17670-90J21.
Do you stock an aftermarket version?
Yes. The Pro Marine F12411 122°F / 50°C thermostat is
linked above.
Do you stock the genuine Suzuki version?
Yes. The genuine Suzuki 17670-90J21 thermostat is also
linked above.
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.
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 Terms
F12411-1, F12411, Yamaha thermostat, Yamaha 122 degree thermostat, Yamaha 50C thermostat, 60V-12411-00-00, Yamaha 60V-12411-00-00, 68V-12411-00-00, Yamaha 68V-12411-00-00, Suzuki thermostat, 17670-90J20, 17670-90J21, Suzuki 17670-90J21, 18-3525, Sierra 18-3525, 8M0175320, 8M6010295, 8M6013864, 881429, Mercury 115 EFI thermostat, Yamaha F115 thermostat, Yamaha LF115 thermostat, Yamaha VZ200 thermostat, Yamaha VZ225 thermostat, Yamaha VZ250 thermostat, Yamaha VZ300 thermostat, Yamaha Z250 thermostat, Yamaha Z300 thermostat, Yamaha LZ250 thermostat, Yamaha LZ300 thermostat, Suzuki DF100A thermostat, Suzuki DF115A thermostat, Suzuki DF140A thermostat, Suzuki DF150 thermostat, Suzuki DF175 thermostat, Suzuki DF200A thermostat, Suzuki DF250 thermostat, Suzuki DF300 thermostat, Suzuki DF300AP thermostat
17670-90J20
17670-90J21
18-3525
60V-12411-00-00
68V-12411-00-00
8M0175320
8M6010295
8M6013864
881429
B6EA
B7EA
DCP-R6E00-00-00
DCPR6E
DCPR7E
DPR-6EA90-00-00
DPR-7EA90-00-00
DPR6EA-9
DPR7EA9
D6EA
D7E-A0000-00-00
D7EA
K92070-081
NGK-DCPR6-E0-00
NGK-DPR6E-A9-00
NGK-DPR7E-A9-00
NGK-DPR7E-VX-90
NGK-D6EA
NGK-D7EA0-00-00
NGK-D7ES0-00-00
0500476
0584918
0765841
0765865
0765960
09482-00446
500476
5031287
5031287
5031912
5035540
5041710
584918
59482-94J00
765841
765865
765960
8M0204682
8M0234113
803507
92070-Y003
92070-1013
92070-1125
92070-1146
94701-00060-00
94701-00189-00
94701-00262-00
94701-00375-00
94701-00379-00
970101103
970101103M
970111103
970111103M
98069-5797Q
68V-13781-00-00
8M0070200
881322
881322002
334650210
334650210M
5040046
8M0135803
8M0214944
803748
61N-11636-00-00
9-53807
6E7-11631-00-97
7131M
7133M
7134M
7982M
7982T
