S2K Commerce - Products Dropdown
Actions
S2K Commerce - Order Entry
Actions
Tohatsu & Nissan Outboard Parts
Shop Tohatsu and Nissan outboard motor parts by system, including cooling, fuel delivery, electrical, internal engine components, lower unit parts, and service items. Browse OEM and replacement marine parts for maintenance, repair, and rebuild projects.
Shop by System
- Control Cables & Boxes
- Cooling System
- Electrical System
- Engine Oil
- Fuel & Carburetion System
- Intake System
- Internal Engine Components
- Lower Unit Components
- Oiling System
- Paints
- Service Manuals
- Steering Systems
- Transom & Midsection
- Trim System
Common Tohatsu & Nissan Outboard Model References
This category supports many popular Tohatsu and Nissan outboards across a wide horsepower range. Always confirm your model and serial number for best fitment.
- Portable & Midrange: 2.5HP–30HP (2-stroke & 4-stroke)
- Midrange: 35HP–70HP (common 2-stroke platforms)
- 3-Cylinder Ranges: 75HP–90HP
- High Horsepower: 115HP–140HP
- Platforms: Carbureted, EFI, and select TLDI direct-injection models
18-6420
3AA760100
3AA760100M
3421
5040343
6L2-81800-10-00
6L2-81800-11-00
6L2-81800-20-00
682-81800-11-00
682-81800-12-00
8M0223446
8M6007363
803835T02
OEM Mercury & Tohatsu Thermostat Gasket
Mercury & Tohatsu 4HP-30HP FourStroke Thermostat Cover Gasket
Genuine OEM thermostat cover gasket used on many Mercury and Tohatsu 4-stroke outboards ranging from 4HP through 30HP. This gasket helps create a proper seal between the thermostat housing and engine components during cooling system service.
Commonly replaced during thermostat maintenance, cooling system repairs, or preventative service on compatible Mercury, Mariner, Nissan, and Tohatsu outboards.
Compatible Mercury Applications
| Engine Range | Engine Type | Application Notes |
|---|---|---|
| 4HP / 5HP / 6HP | Mercury FourStroke | Select models and serial ranges |
| 8HP / 9.9HP | Mercury FourStroke | 209cc applications |
| 9.9HP ProKicker | Mercury FourStroke | Select ProKicker applications |
| 15HP / 20HP | Mercury Carbureted & EFI FourStroke | 2-cylinder applications |
| 25HP / 30HP | Mercury EFI FourStroke | 3-cylinder applications including Jet models |
| 15HP SeaPro | Mercury FourStroke | International SeaPro models |
Compatible Tohatsu Applications
| Engine Range | Engine Type | Application Notes |
|---|---|---|
| 8HP / 9.8HP | Tohatsu FourStroke | Select MFS models |
| 15HP / 20HP | Tohatsu FourStroke | Select EFI and carbureted models |
| 25HP / 30HP | Tohatsu FourStroke | Select EFI applications |
| Nissan Marine | FourStroke Outboards | Select rebadged Tohatsu applications |
OEM Part Numbers & Cross References
| Brand | Part Numbers |
|---|---|
| Mercury | 8M0214960, 853702, 853702005, 898101194 |
| Tohatsu | 3H6010320, 3H6010320M, 346010320, 346010320M, 350020320, 350020320M |
| Sierra | 18-60920 |
| Mallory | 9-60920 |
What This Thermostat Gasket is Used For
This OEM thermostat cover gasket is used to properly seal the thermostat housing during cooling system operation on compatible Mercury and Tohatsu outboards.
Replacing the gasket during thermostat service helps prevent coolant leaks, improper thermostat sealing, and cooling system pressure loss.
Thermostat gaskets are commonly replaced whenever the thermostat housing is removed for inspection, thermostat replacement, or routine maintenance.
Using the correct OEM gasket helps maintain proper fitment and sealing performance in harsh freshwater and saltwater marine environments.
Key Features and Benefits
- Genuine OEM Mercury and Tohatsu thermostat gasket
- Fits many 4HP-30HP FourStroke outboards
- Helps seal thermostat housing properly
- Supports cooling system reliability
- Common replacement during thermostat service
- Designed for marine cooling system environments
- OEM-quality fit and material construction
- Compatible with multiple Mercury and Tohatsu platforms
Thermostat Gasket Details
- Part Type: Thermostat Cover Gasket
- Primary OEM Number: 8M0214960
- Application: Mercury & Tohatsu FourStroke Outboards
- Horsepower Range: 4HP-30HP
- System: Engine Cooling System
- Use: Thermostat housing sealing
- Material: OEM marine gasket material
FAQ
What does this thermostat gasket fit?
This gasket fits many Mercury and Tohatsu-built 4-stroke outboards
ranging from 4HP through 30HP depending on model and serial range.
Should I replace the gasket when replacing the thermostat?
Yes. It is recommended to replace the thermostat gasket whenever the thermostat housing is removed to help ensure a proper seal.
Is this an OEM Mercury part?
Yes. This is a genuine OEM-style thermostat gasket cross-referenced to Mercury part number 8M0214960 and related superseded numbers.
Does this fit Tohatsu and Nissan outboards?
Yes. Many Mercury small FourStroke outboards are manufactured by Tohatsu, and this gasket also cross references to several Tohatsu and Nissan Marine part numbers.
Can a damaged thermostat gasket cause cooling issues?
Yes. A leaking or damaged gasket can contribute to improper thermostat operation, coolant leakage, or inconsistent engine temperatures.
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.
- 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
8M0214960, 853702, 853702005, 898101194, 3H6010320, 3H6010320M, 346010320, 346010320M, 350020320, 350020320M, thermostat gasket, Mercury thermostat gasket, Tohatsu thermostat gasket, Mercury 25HP thermostat gasket, Mercury 30HP thermostat gasket, Tohatsu thermostat cover gasket, Nissan Marine thermostat gasket, Sierra 18-60920
3H6010320
3H6010320M
346010320
346010320M
350020320
350020320M
5040066
8M0214960
853702
853702005
898101194
Starter Motor 9 Tooth 3453A
The 3453A Starter Motor 9 Tooth PRO is a high-quality replacement starter designed for Honda and Tohatsu four-stroke outboards. This unit delivers reliable cranking performance and replaces multiple OEM starter motor part numbers used across the 75HP–150HP platform.
Fitment Overview
This starter is used on Honda BF-series outboards and their Tohatsu equivalents. Cross reference numbers including 31200-ZY6-003, 31200-ZY9-003, and 31200-ZY9-H01 confirm fitment across the full Honda 4-cylinder 75HP–150HP engine family.
Compatibility
| Brand | Model | Year Range |
|---|---|---|
| Honda | BF75 | 2004-Present |
| Honda | BF90 | 2004-Present |
| Honda | BF115 | 2004-Present |
| Honda | BF135 | 2004-Present |
| Honda | BF150 | 2004-Present |
| Tohatsu | BFT75A | 2014-Present |
| Tohatsu | BFT90A | 2014-Present |
| Tohatsu | BFT115A | 2014-Present |
| Tohatsu | BFT135A | 2014-Present |
| Tohatsu | BFT150A | 2014-Present |
Fits These Serial Ranges
This starter is used across the Honda 75HP–150HP four-cylinder platform and does not have a single clean serial break. Fitment is best confirmed by matching one of the OEM part numbers listed below to your engine diagram.
Important: Always verify your original starter number or engine serial number before ordering to ensure correct fitment.
Part Numbers and Cross References
| Type | Part Number |
|---|---|
| Pro Marine | 3453A |
| Honda OEM | 31200-ZY6-003 |
| Honda OEM | 31200-ZY9-003 |
| Honda OEM | 31200-ZY9-H01 |
| Honda Alt | HZY631200003 |
| Honda Alt | HZY931200H01 |
| Sierra | 18-6959 |
| Mercury | 8M6007337 |
| Mercury | 8M6010750 |
What This Part Is Used For
This starter motor is responsible for turning the engine over during startup. It engages the flywheel using a 9-tooth gear and provides the torque needed to crank larger four-stroke outboards reliably.
- 9-tooth starter drive for proper engagement
- Designed for Honda 75–150HP four-stroke engines
- Also fits Tohatsu rebadged Honda platforms
- Direct replacement for multiple OEM starter numbers
If your engine is slow to crank, clicks without starting, or has intermittent starting issues, replacing the starter motor can restore proper operation.
FAQ
What engines does this starter fit?
It fits Honda BF75, BF90, BF115, BF135, and BF150 models, as well as Tohatsu BFT75A, BFT90A, BFT115A, BFT135A, and BFT150A.
What OEM numbers does this replace?
It replaces 31200-ZY6-003, 31200-ZY9-003, 31200-ZY9-H01 and related cross references.
Is this a 9-tooth starter?
Yes, this is a 9-tooth starter motor designed for these engine platforms.
How do I confirm fitment?
Match your original starter number or check your engine diagram against the OEM numbers listed 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.
- 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 Part Numbers
3453A, 31200-ZY6-003, 31200-ZY9-003, 31200-ZY9-H01, HZY631200003, HZY931200H01, 18-6959, 8M6007337, 8M6010750
HZY631200003
HZY931200H01
18-6959
31200-ZY6-003
31200-ZY9-H01
31200-ZY9-003
8M6007337
8M6010750
16911-ZY3-000
16911-ZY3-000
16911-ZY3-010
18-79908
18-79908
16058T
18-5143
369-06021-0
369060210
369060210M
HZY623172000
23172-ZY6-000
16064T05
160642
160643
160645
18-5133
184-0643
189-3081
189-3381
3A0-06040-1
3A0060400
3A0060400M
3A0060401
3A0060401M
3A0060480
3A0060480M
3A0060481
3A0060481M
3A0060500
3A0060500M
3A0060501
3A0060501
3A0060530
3A0060530M
8M0047311
184-3706
189-3381
3G2-06040-2
3G206040M
3G2060400M
3G2060401
3G2060401M
3G2060402
3G2060402M
3G2060530
3G2060530M
3M060480
3M3-06048-2
3M3060480M
3M3060481
3M3060481M
3M3060482M
362060500
362060500M
362060501
362060501M
6G2060400
8M0047313
8M0121784
803706A1
803706A3
8-90HP
Tohatsu
60hp 2014-2019
75hp 2014-2019
90hp 2014-2019
HZV416910015
16910-ZV4-015
9-37957
Honda
BF 115 130 135 150 175 200 225
Tohatsu
115hp 2014-2019
150hp 2014-2023
200hp 2018-2023
225hp 2018-2023
250hp 2018-2023
16901-ZY3-003
16911-ZY3-003
18-79909
HZY316901003
16901-ZY3-003
16911-ZY3-003
18-79909