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Tohatsu & Nissan Outboard Parts
Shop OEM and aftermarket Tohatsu and Nissan outboard parts for maintenance, repair, troubleshooting, and complete engine service projects. Browse marine parts by system, including cooling, fuel delivery, electrical, internal engine components, lower unit parts, steering, trim, and routine service items.
Pro Marine USA carries Tohatsu and Nissan outboard engine parts for a wide range of 2-stroke, Four Stroke, EFI, and TLDI applications. Use your engine horsepower, model number, serial number, or OEM part number whenever possible to confirm fitment before ordering.
Shop Tohatsu & Nissan Outboard Parts 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
Find the Correct Tohatsu or Nissan Outboard Part
Tohatsu and Nissan outboard parts can vary by horsepower, model number, engine family, and production range. If you are unsure which component fits your engine, use the OEM parts lookup to identify the original part number from a factory parts diagram.
Once you have the OEM part number, search Pro Marine to find available OEM and aftermarket replacement options.
Use Our OEM Parts Lookup »Common Tohatsu & Nissan Outboard Engine Families
Pro Marine supports many Tohatsu and Nissan outboards across a wide horsepower range. Always confirm the exact engine model and serial information before ordering parts.
- Portable and Small Outboards: common 2.5HP through 30HP 2-stroke and Four Stroke applications
- Midrange: 35HP through 70HP applications across multiple engine families
- Three-Cylinder Platforms: common 75HP through 90HP applications
- High-Horsepower: 115HP through 140HP applications
- EFI: electronically fuel-injected Tohatsu platforms
- TLDI: Tohatsu direct-injection 2-stroke engine families
Common Tohatsu & Nissan Repair Areas
- Engine overheating: inspect the water pump, impeller, thermostat, cooling passages, pressure-control components, and engine anodes.
- Hard starting or rough running: inspect fuel pumps, carburetors or injectors, filters, spark plugs, ignition components, and intake sealing.
- No spark or electrical problems: inspect ignition coils, stators, CDI components, rectifiers, sensors, wiring, and grounds.
- Low compression or power loss: inspect pistons, rings, cylinders, bearings, gaskets, reeds, and other internal engine components.
- Lower unit noise or water intrusion: inspect prop shaft seals, driveshaft seals, shift shaft seals, bearings, gears, and gear lube condition.
- Trim or steering problems: inspect trim motors, hydraulic components, steering systems, hoses, seals, and related rigging parts.
Why Buy Tohatsu & Nissan Outboard Parts from Pro Marine USA?
- OEM and aftermarket replacement options for many Tohatsu and Nissan outboard applications.
- Parts for routine maintenance, professional repair, lower units, fuel systems, electrical systems, steering, trim, and internal engine work.
- OEM diagram and part-number lookup tools to help identify the correct component before ordering.
- Dealer pricing available for qualified marine repair businesses and dealers.
- Large selection of cooling, fuel, electrical, lower unit, and service components.
- Fast weekday shipping on qualifying in-stock orders.
Frequently Asked Questions
How do I find the correct Tohatsu or Nissan outboard part?
Start with the engine horsepower, model number, serial number, and production information whenever available. Use the OEM parts lookup to identify the original part number from a factory diagram.
Can I search Tohatsu and Nissan parts by OEM part number?
Yes. Enter the 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 Tohatsu and Nissan outboard parts interchange?
Some Tohatsu and Nissan outboard applications share related engine platforms and components, but fitment should never be assumed. Confirm the model, production range, and OEM part number before ordering.
Do you carry parts for Tohatsu TLDI engines?
Yes. Pro Marine carries parts for many Tohatsu TLDI applications, including cooling, fuel, electrical, internal engine, lower unit, steering, and trim components.
Do you carry parts for older Nissan outboards?
Yes. Pro Marine carries replacement parts for many older Nissan outboard applications. Availability varies by engine family and component.
What Tohatsu and Nissan parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters where applicable, fuel filters, spark plugs, water pump kits, impellers, thermostats, gear lube, drain plug seals, anodes, and model-specific service components.
Fitment Tip: Tohatsu and Nissan outboard parts can vary by model, horsepower, engine family, and production range. Confirm the OEM part number or complete engine identification information whenever possible before ordering.
MAR-FLTHD-10-BK
55481
89876
89876A3
9-37855
9-37862
Sierra Marine Fuel / Water Separator Filter
Sierra 18-7920 Fuel / Water Separator - 10 Micron - 1"-12 Thread
The Sierra 18-7920 Fuel / Water Separator is a 10-micron spin-on replacement filter designed for universal marine fuel filtration applications using a 1"-12 thread.
This filter uses the large center-hole configuration and is designed to help remove water and fine contaminants from the fuel supply before they reach the engine.
Sierra 18-7920 cross references popular Mercury, Johnson / Evinrude, OMC, Racor and Fram fuel / water separator numbers listed below.
Thread: 1"-12
Filtration: 10 Micron
Style: Spin-On Replacement
Application: Universal Marine
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Sierra |
| Sierra Part Number | 18-7920 |
| Filter Type | Fuel / Water Separator |
| Filtration Rating | 10 Micron |
| Thread Pitch | 1"-12 |
| Configuration | Large Center Hole |
| Replacement Style | Spin-On |
| Application | Universal Marine |
OEM & Cross Reference Numbers
| Manufacturer / Brand | Part Number |
|---|---|
| Sierra | 18-7920 |
| Fram | CH33APL |
| Johnson / Evinrude Outboard | 771839 |
| Mercury Marine | 35-809099 |
| OMC Stern Drive | 771839 |
| Racor | B32014 |
| Racor | S3214 |
Universal Marine Application
Sierra 18-7920 is a universal replacement fuel / water separator filter for compatible marine filter heads using a 1"-12 threaded filter.
Because this filter is used across multiple marine engine brands and fuel systems, fitment should be determined by the filter-head thread and the existing filter cross-reference number rather than by engine horsepower alone.
This is the large-hole 1"-12 thread style fuel / water separator.
Compare your existing filter number and filter-head thread before ordering. Marine fuel separator filters may look very similar while using different center-hole sizes or thread pitches.
What a Fuel / Water Separator Does
A marine fuel / water separator helps protect the engine fuel system by removing water and particulate contamination before the fuel reaches the engine.
Water can enter a marine fuel system through condensation, contaminated fuel or moisture in the tank. The separator provides an additional stage of filtration before the engine-mounted fuel filter or fuel injection system.
10-Micron Filtration
The Sierra 18-7920 is rated at 10 microns, allowing it to capture fine fuel contaminants while separating water from the fuel supply.
Maintaining a clean fuel / water separator can help reduce the chance of restricted fuel flow and contamination reaching carburetors, fuel pumps or fuel injection components.
When Should a Fuel / Water Separator Be Replaced?
Replacement intervals vary based on engine use, fuel quality and operating conditions. Fuel / water separator filters should be inspected and replaced as part of regular marine engine maintenance.
Replacement should also be considered whenever contaminated fuel or water in the fuel system is suspected.
Common Reasons for Replacement
- Routine annual or seasonal maintenance
- Water found in the fuel system
- Contaminated or stale fuel
- Restricted fuel flow
- Engine fuel starvation symptoms
- Unknown age of the existing fuel separator
- Replacing Fram CH33APL
- Replacing Johnson / Evinrude or OMC 771839
- Replacing Mercury 35-809099
- Replacing Racor B32014 or S3214
Installation Notes
Confirm that the filter head uses the correct 1"-12 thread before installation.
Follow the engine or filter-head manufacturer's installation procedure. Inspect the filter-head sealing surface and make sure the old filter gasket has been completely removed before installing the replacement.
Key Features and Benefits
- Sierra marine replacement fuel / water separator
- Sierra part number 18-7920
- 10-micron filtration rating
- 1"-12 thread pitch
- Large center-hole configuration
- Spin-on replacement design
- Universal marine application
- Replaces Fram CH33APL
- Replaces Johnson / Evinrude 771839
- Replaces OMC 771839
- Replaces Mercury 35-809099
- Replaces Racor B32014
- Replaces Racor S3214
- Helps remove water and contaminants from marine fuel
FAQ
What is the micron rating of Sierra 18-7920?
The Sierra 18-7920 is a 10-micron fuel / water separator.
What thread does Sierra 18-7920 use?
It uses a 1"-12 thread.
Is this the large-hole fuel / water separator?
Yes. Sierra 18-7920 is the large center-hole configuration.
Is Sierra 18-7920 a spin-on filter?
Yes. It is a spin-on replacement fuel / water separator.
What Mercury filter does Sierra 18-7920 replace?
It cross references Mercury Marine 35-809099.
What Johnson / Evinrude or OMC number does it replace?
It replaces 771839.
What Racor filters does it replace?
It cross references Racor B32014 and S3214.
What Fram filter does it replace?
It cross references Fram CH33APL.
Is this filter engine-specific?
No. It has a universal marine application for compatible
filter heads using the correct 1"-12 thread.
How do I know if this filter fits my boat?
Compare the existing filter part number and verify that your filter head
uses a 1"-12 thread. Cross-reference numbers are 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 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 verifying the correct fuel separator?
Contact Pro Marine
Phone: 941-721-3000
Searchable Terms
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0002507
0771839
18-7920
MAR-FLTHD-10-BK
9-37862
0360941
0398319
0435918
0765595
0777715
18-7831
18-7831
311679
360941
398319
40165
765595
777715
802128A1
55481
89876
89876A3
9-37855
