Description
Complete Carburetor Rebuild Kit — Mercury/Mariner Outboard
The iFJF 18-7750-1 carburetor repair kit provides a comprehensive solution for rebuilding your outboard carburetor. Engineered for Mercury, Mariner, and compatible 2-stroke outboard applications, this kit replaces all critical wear components — restoring proper fuel metering, eliminating fuel leaks, and returning your engine to peak running condition.
Key Features
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Complete Rebuild Kit: Includes float bowl gasket, inlet needle & seat, body gaskets, o-rings, welch plugs, and drain screw washers — everything required for a full carburetor overhaul.
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Ethanol-Resistant Components: All rubber and composite parts are formulated to withstand E10 and ethanol-blended fuels that can swell and degrade standard materials.
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OEM-Spec Precision: Manufactured to exact factory tolerances for proper float height control, leak-free sealing, and consistent fuel delivery throughout the RPM range.
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Restores Performance: Fixes common outboard issues: hard starting, rough idle, hesitation on acceleration, fuel leaks, and rich/lean running conditions.
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Cost-Effective: A fraction of the cost of a complete carburetor replacement — and in most cases, the only parts that actually wear out.
Cross-Reference / Interchange Part Numbers
| Brand |
Part Number |
| Sierra Marine |
18-7750-1 |
| Mercury / Mariner OEM |
1395-8236354, 1395-8236353, 1395-8236352, 1395-8236351 |
Why Carburetor Gaskets Fail
Modern pump gasoline contains up to 10% ethanol (E10) — a solvent that attacks traditional rubber and cork gasket materials. Over time, ethanol causes gaskets to swell, shrink, or disintegrate entirely. This kit's components use upgraded materials designed to resist ethanol degradation, providing a longer-lasting seal in today's fuel environment. For maximum lifespan, we recommend using ethanol-free marine fuel whenever available.
Installation Tips
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Document everything: Take photos of linkage positions, hose routing, and gasket orientation before disassembly.
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Deep clean: Soak the stripped carburetor body in quality carb cleaner. Blow compressed air through every passage.
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Verify float height: Check and adjust to factory specification before closing the bowl. Incorrect float height is the #1 cause of post-rebuild running issues.
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Replace one at a time: On multi-carb engines, rebuild carbs individually to avoid mixing up components.
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Primer bulb test: After reassembly, pump the primer bulb until firm and check for leaks before starting.
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Initial start: It may take several pulls or extended cranking to fill the dry carburetor with fuel.
Frequently Asked Questions
Q: How many carburetors does one kit cover?
A: One kit services ONE carburetor. If your outboard has 2, 3, or 4 carburetors, order the corresponding number of kits. For best results, rebuild all carburetors at the same time for balanced fuel delivery.
Q: Does this kit include new jets?
A: No. Jets are typically reusable unless physically damaged or severely corroded. The jets in your existing carburetor can be cleaned and reinstalled. If you need replacement jets, they're available separately.
Q: Will this fix my engine running rough at low RPM?
A: In many cases, yes. Rough low-speed running is often caused by a clogged pilot/idle circuit or air leak from deteriorated gaskets. The thorough cleaning you'll perform during the rebuild, combined with new gaskets, addresses both issues.
Q: How long does a rebuilt carburetor last?
A: With ethanol-free fuel, 5-10+ years before another rebuild is needed. With E10 fuel and regular use, expect 3-5 years. Running the carburetor dry before storage significantly extends rebuild life by preventing fuel varnish buildup.
Q: Can a beginner rebuild an outboard carburetor?
A: Yes, with patience and organization. Key requirements: a clean workspace, good lighting, a service manual for your specific engine, and the discipline to not rush. Budget 1.5-2 hours per carburetor.
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