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99157A02
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89616
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175hp DFI 1E052967 & Up
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L4 Inline 4 / L6 Inline 6
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Mariner
135HP
150Hp
175hp
200hp
225hp
250hp
275hp
300hp
881879A20
881879T26
Pro Marine 122°F / 50°C Outboard Thermostat
Yamaha, Suzuki & Mercury 122°F / 50°C Thermostat - Pro Marine F12411
The Pro Marine F12411 Thermostat is an aftermarket 122°F / 50°C outboard engine thermostat for a broad range of Yamaha, Suzuki and Mercury applications.
Verified fitment includes select Yamaha F115 / LF115 four-strokes and 200-300HP HPDI engines, extensive Suzuki DF100A through DF300AP four-stroke applications, and select Mercury 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 multiple Mercury OEM numbers listed below.
OEM & Cross Reference Numbers
| Brand / Type | Part Number |
|---|---|
| Pro Marine | 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 engines.
| Yamaha Engine Family | Verified Application Coverage |
|---|---|
| F115 Four-Stroke | Extensive 2000 and later F115 applications including F115TLR, F115TXR, F115TJR, F115JA, F115LA, F115XA and related configurations. |
| LF115 Counter-Rotation | Extensive 2000 and later LF115 applications including LF115TXR, LF115XA and related counter-rotation configurations. |
| VZ200 HPDI | Select 2005 and later VZ200TLR and VZ200RTLR applications. |
| VZ225 HPDI | Select 2003 and later VZ225TLR and VZ225HTLR applications. |
| VZ250 HPDI | Select 2003 and later VZ250TLR and VZ250FTLR applications. |
| VZ300 HPDI | Select 2004 and later VZ300TLR and VZ300BTLR applications. |
| Z250 / LZ250 HPDI | Select 2003 and later Z250 and counter-rotation LZ250 TUR / TXR applications. |
| Z300 / LZ300 HPDI | Select 2004 and later Z300 and counter-rotation LZ300 TUR / TXR applications. |
Suzuki Fitment
| Suzuki Engine Family | Verified Application Coverage |
|---|---|
| DF100A | Select DF100A and DF100AT applications beginning with 2013 and later model / serial families. |
| DF115A | Select DF115A, DF115AT, DF115AST and DF115AZ applications. |
| DF140A | Select DF140A, DF140AT and DF140AZ applications. |
| DF150 | Select DF150, DF150AP, DF150AS, DF150AST, DF150AT and DF150AZ applications including later model / serial families. |
| DF175 | Select DF175, DF175AP, DF175AT and DF175AZ applications. |
| DF200A | Select DF200A, DF200AP, DF200AST, DF200AT and DF200AZ applications. |
| DF250A | Select DF250A, DF250AP and DF250ATSS applications. |
| DF300A / DF300AP | Select DF300A and DF300AP applications including later 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 |
Thermostat fitment can vary within the same horsepower and engine family. Verify the complete engine model / serial number and confirm that the original thermostat cross references one of the OEM numbers listed above.
This thermostat is rated at approximately 122°F / 50°C.
OEM Thermostat Options
Prefer an OEM thermostat? Pro Marine stocks both the Yamaha OEM and Suzuki OEM versions of this thermostat family.
Yamaha OEM F12411-1 122°F / 50°C Thermostat
Genuine Yamaha OEM thermostat for compatible Yamaha engines using 60V-12411-00-00 or 68V-12411-00-00.
Suzuki OEM 17670-90J21 50°C / 122°F Thermostat
Genuine Suzuki OEM thermostat for compatible Suzuki applications using 17670-90J20 or 17670-90J21.
What This Thermostat Does
The thermostat regulates cooling-water flow through the engine so the powerhead can reach and maintain the correct operating temperature.
When the engine is cold, the thermostat restricts cooling-water flow. As the engine reaches approximately 122°F / 50°C, the thermostat begins opening to allow additional cooling water to circulate.
Proper thermostat operation helps support correct engine warm-up, fuel management, combustion quality and overall cooling-system performance.
Common Signs of a Thermostat Problem
- Engine running hotter than normal
- Overheat alarm or warning
- Thermostat stuck closed and restricting cooling water
- Engine running too cool because the thermostat is stuck open
- Salt, mineral or corrosion buildup
- Damaged thermostat spring or valve
- Thermostat does not open at the correct temperature during testing
Why Choose the Pro Marine F12411?
- Pro Marine aftermarket 122°F / 50°C thermostat
- Cost-effective alternative to OEM Yamaha and Suzuki versions
- Replaces Yamaha 60V-12411-00-00
- Replaces Yamaha 68V-12411-00-00
- Replaces Suzuki 17670-90J20 and 17670-90J21
- Cross references Sierra 18-3525
- Cross references Mercury 8M0175320
- Cross references Mercury 8M6010295
- Cross references Mercury 8M6013864
- Cross references Mercury 881429
- Fits select Yamaha F115 / LF115 four-strokes
- Fits select Yamaha 200-300HP HPDI engines
- Fits select Suzuki DF100A-DF300AP applications
- Fits select Mercury 115HP EFI engines
- Yamaha OEM and Suzuki OEM options linked above
FAQ
What temperature is the Pro Marine F12411 thermostat?
It is rated at approximately 122°F / 50°C.
Is F12411 an OEM thermostat?
No. F12411 is the Pro Marine aftermarket version.
Genuine Yamaha and Suzuki OEM options are linked above.
Does F12411 fit Yamaha F115?
Yes. The supplied fitment includes numerous F115 and LF115 four-stroke
applications beginning with 2000 model families and continuing into later
applications.
Does it fit Yamaha HPDI engines?
Yes. Verified fitment includes select VZ200, VZ225, VZ250, VZ300,
Z250, Z300, LZ250 and LZ300 HPDI applications.
Does this fit Suzuki DF100A, DF115A and DF140A?
Yes. Extensive applications are included for all three families.
Does it fit Suzuki DF150, DF175 and DF200A?
Yes. The supplied fitment includes numerous standard, AP, AT, AZ and
related configurations.
Does it fit Suzuki DF250 and DF300?
Yes. Select DF250A / AP / ATSS and DF300A / AP applications are included.
Does this fit Mercury 115HP EFI?
Yes. Verified applications include serial ranges
0T178500 thru 0T800999,
0T801000 thru 1B226999, and
1B227000 thru 1B366822.
What Yamaha OEM thermostat numbers does F12411 replace?
It cross references 60V-12411-00-00 and
68V-12411-00-00.
What Suzuki thermostat numbers does it replace?
It cross references 17670-90J20 and
17670-90J21.
Is a Yamaha OEM version available?
Yes. The Yamaha OEM F12411-1 thermostat is linked above.
Is a Suzuki OEM version available?
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, Pro Marine F12411, 122 degree thermostat, 122F thermostat, 50C thermostat, Yamaha thermostat, Suzuki thermostat, Mercury thermostat, 60V-12411-00-00, Yamaha 60V-12411-00-00, 68V-12411-00-00, Yamaha 68V-12411-00-00, 17670-90J20, Suzuki 17670-90J20, 17670-90J21, Suzuki 17670-90J21, 18-3525, Sierra 18-3525, 8M0175320, 8M6010295, 8M6013864, 881429, Yamaha F115 thermostat, Yamaha LF115 thermostat, Yamaha HPDI thermostat, Yamaha VZ200 thermostat, Yamaha VZ225 thermostat, Yamaha VZ250 thermostat, Yamaha VZ300 thermostat, Yamaha Z250 thermostat, Yamaha Z300 thermostat, Suzuki DF100A thermostat, Suzuki DF115A thermostat, Suzuki DF140A thermostat, Suzuki DF150 thermostat, Suzuki DF175 thermostat, Suzuki DF200A thermostat, Suzuki DF250A thermostat, Suzuki DF300A thermostat, Suzuki DF300AP thermostat, Mercury 115 EFI thermostat
17670-90J20
17670-90J21
18-3525
60V-12411-00-00
68V-12411-00-00
8M0175320
8M6010295
8M6013864
881429
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
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
334650210
334650210M
5040046
8M0135803
8M0214944
803748
0382385
0396987
0778261
13080
18-3557
382385
396987
47594
778261
9-43024
0768741
0777840
10561
18-3290
321886
768741
777-105
777840
32437A3
37433A1
42579A4
44292A4
48747A3
508395
508399
508400
508402
508403
508404
508406
508414
509047
57234A3
58618A4
60367A1
60367A4
64141A11
69222A3
73802A3
73804A3
78400A2
96148A5
96148A8
96148BK8
96148B5
96148B8
96148T8