Carburetor Repair Kit for Tohatsu 8HP/9.8HP 4-Stroke Outboards – Replaces 3V1-87122-0
Carburetor Repair Kit for Tohatsu 8HP/9.8HP 4-Stroke Outboards – Replaces 3V1-87122-0 is backordered and will ship as soon as it is back in stock.
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Carburetor Repair Kit for Tohatsu 8HP/9.8HP 4-Stroke Outboards – Re...
Carburetor Repair Kit for Tohatsu 8HP/9.8HP 4-Stroke Outboards – Replaces 3V1-87122-0 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket carburetor repair kit is designed to service compatible Tohatsu 8HP and 9.8HP four-stroke outboard carburetors. It replaces worn gaskets, seals, the float-related components, the needle valve and other service parts to help restore proper fuel metering and reliable engine operation.
The kit is associated with Tohatsu OEM reference 3V1-87122-0, also written without hyphens as 3V1871220M in some listings. Confirm the number, carburetor configuration and engine model before ordering.
- Replacement carburetor service kit for selected marine outboards.
- Helps address hard starting, poor idling, fuel leakage and inconsistent fuel delivery caused by worn service parts.
- Suitable for DIY or professional installation by a technician familiar with outboard carburetors.
- Aftermarket replacement; not an OEM-manufactured component.
Reference Part Numbers
These references are provided for identification and cross-reference purposes. A matching number alone does not replace verification of the complete engine model and serial-number range.
| Brand or source | Reference | Use |
|---|---|---|
| Tohatsu | 3V1-87122-0 | OEM reference |
| Tohatsu | 3V1871220M | Unhyphenated reference format used in some listings |
| Mercury | 802706A1 | Separate Mercury carburetor-kit reference; verify the exact Mercury engine application before using this cross-reference |
| Yamaha | 66M-W0093-01-00 | Separate Yamaha carburetor-kit reference found in Yamaha parts catalogs; verify the exact Yamaha application before ordering |
| Sierra | 18-7738 | Aftermarket cross-reference shown in the original listing; verify application independently |
| Mallory | 9-37510 | Aftermarket cross-reference shown in the original listing; verify application independently |
Confirmed Application Guidance
The strongest available application evidence associates reference 3V1-87122-0 with Tohatsu carburetor kits for the MF8/9.8A, MF8/9.8A2 and MF8/9.8A3 model families. The model-family reference does not establish every year, serial number, shaft length or regional variant, so those details must be checked against the engine identification plate and service information.
| Brand | Model family | Rated output | Stroke | Application note |
|---|---|---|---|---|
| Tohatsu | MF8/9.8A | 8HP / 9.8HP | 4-Stroke | Verify the exact carburetor and serial range |
| Tohatsu | MF8/9.8A2 | 8HP / 9.8HP | 4-Stroke | Verify the exact carburetor and serial range |
| Tohatsu | MF8/9.8A3 | 8HP / 9.8HP | 4-Stroke | Verify the exact carburetor and serial range |
Do not assume compatibility with Nissan-branded engines, Mercury engines or Yamaha engines solely because a similar reference appears in a cross-reference list. Those applications require separate confirmation of the engine model, year or serial range and carburetor configuration.
Technical Specifications
- Product Type
- Carburetor repair kit
- Primary Application
- Selected Tohatsu 8HP and 9.8HP four-stroke outboards
- Fuel System
- Carbureted gasoline outboard engine
- Installation
- DIY or professional installation
- Part Type
- Aftermarket replacement service kit
- Fitment Requirement
- Match the carburetor and engine identification details before purchase
What’s in the Box
The original listing identifies the following service components. Exact component appearance may vary by production batch, so compare the supplied pieces with the original carburetor and the applicable service information before installation.
- 1 x Gasket, 66M-14398-00-00 reference
- 1 x Gasket, 6L2-14398-00-00 reference
- 1 x Stopper, 66M-14377-00-00 reference
- 1 x Float-chamber gasket, 66M-14384-00-00 reference
- 1 x Float, 6L2-14385-00-00 reference
- 1 x Float pin, 6E5-14386-01-00 reference
- 1 x Needle valve, 6L2-14392-00-00 reference
- 1 x Gasket, 62Y-14399-00-00 reference
- 1 x Air-adjusting screw, 12V-14105-00-00 reference
- 4 x Screws with washers, 97980-04112-00 reference
- 1 x O-ring, 5H0-14397-00-00 reference
- 1 x O-ring, 6F5-14397-00-00 reference
- 1 x Filter, 66M-14827-00-00 reference
Installation Notes
- Stop the engine, disconnect the battery where applicable and shut off the fuel supply before beginning work.
- Remove the carburetor according to the applicable engine service procedure.
- Disassemble the carburetor on a clean work surface and record the position of adjustment parts before removal.
- Clean reusable metal parts with a suitable carburetor cleaner. Keep rubber and plastic components away from solvents that may damage them.
- Remove the old gaskets, seals, float components and needle valve being replaced.
- Install the new components and confirm that each gasket and O-ring is seated correctly.
- Set float height and adjustment screws only to the specifications in the applicable engine service manual.
- Reassemble and reinstall the carburetor, reconnect the fuel line and check carefully for leaks.
- Start and tune the engine only in a safe, well-ventilated area and follow the manufacturer’s adjustment procedure.
Troubleshooting & FAQ
How do I confirm fitment?
Compare the number on the original carburetor or repair kit with the listed reference, then verify the complete engine model family and serial-number range. Also compare the carburetor body, float arrangement and gasket layout before installation.
What symptoms may indicate a carburetor rebuild is needed?
Hard starting, rough idle, stalling, fuel leakage, poor throttle response and loss of power may result from blocked passages, worn gaskets, a damaged float or a leaking needle valve. These symptoms can also have other causes, so inspect the complete fuel system.
Are special tools required?
Basic hand tools and appropriate carburetor cleaner are generally required. A float-height gauge or suitable measuring tool may be needed, depending on the engine service procedure.
Can this kit be used on every 8HP or 9.8HP outboard?
No. Horsepower and stroke alone do not confirm fitment. Match the engine model, serial range and carburetor configuration before ordering.
What should I do if the engine runs poorly after installation?
Check for air leaks, fuel leaks, incorrect gasket placement, debris in the passages and an incorrectly set float. Use the applicable service manual for idle and mixture adjustments rather than relying on a universal setting.
Is this an OEM part?
No. This is an aftermarket replacement kit. The listed manufacturer numbers are reference numbers used to identify possible applications and are not a claim that this kit was manufactured by the engine brand.
Safety & Important Information
- Work in a well-ventilated area away from flames, sparks and other ignition sources.
- Use eye protection and follow the instructions for any cleaning chemicals.
- Confirm the engine model, serial range and carburetor configuration before purchase.
- Professional installation is recommended when the correct float, gasket or adjustment specifications are uncertain.
About Sea Sierra
Sea Sierra supplies aftermarket marine replacement parts and service components for maintenance and repair applications. Product fitment should always be confirmed against the engine identification information and the original component before ordering.
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