JLM MARINE Carburetor Repair Kit for Johnson Evinrude 90-175 HP — 4-Pack, Gaskets & Diaphragms

If your Johnson or Evinrude outboard is showing signs of rough idling, hard starting, or reduced throttle response, worn carburetor parts are often the cause. This kit supplies the common seals, gaskets, diaphragms, and small parts needed to rebuild the carburetor and return it to reliable operation. The package contains four full repair kits and cross-references OEM and aftermarket numbers so you can confirm compatibility before you begin the job.

Which engines and part numbers does this kit support?

This repair kit is designed for Johnson and Evinrude OMC carburetors used on a range of 90HP to 175HP outboards. It covers multiple OEM part numbers and known aftermarket equivalents for easy identification.

• Compatible HP: 90, 105, 115, 150, 175
• Replaces: Johnson/Evinrude 438996, 435442, 436852, 777719
• Aftermarket cross-references: Sierra 18-7247, Mallory 9-37102 and 9-37108
• Includes four identical carburetor repair sets in one package

What parts are included and what will they fix?

The kit bundles the typical wear items that fail in service — gaskets, O-rings, diaphragms, needle valves and other small replacement parts needed to refurbish the carburetor’s internal seals and metering systems. Replacing these parts corrects common fuel flow issues that lead to poor mixture and engine performance.

• Gaskets and manifold seals to stop air and fuel leaks
• Diaphragms and needle assemblies to restore correct fuel metering
• O-rings and small hardware for secure reassembly
• Four sets included for multiple carburetors or spares

How does installing this kit affect engine performance?

Refurbishing the carburetor with fresh seals and metering parts helps reestablish the intended air-fuel ratio and eliminates vacuum or fuel leaks that often cause misfires, hesitation, or poor throttle response. After rebuilding, expect more consistent idling and smoother acceleration if the carburetor is the root cause.

• Reduces rough idle and stalling from leaking diaphragms
• Improves throttle response by restoring proper fuel flow
• Helps stabilize mixture across rpm range when installed correctly
• Extends service life of the carburetor without full replacement

What should I prepare before I attempt the repair?

Successful carburetor rebuilds require basic tools, a clean workspace, and familiarity with small engine components. Inspect the carburetor body for corrosion or severe damage — a rebuild kit restores internal parts, but it won’t fix cracked bodies or heavily corroded passages.

• Gather screwdrivers, small wrenches, needle-nose pliers, and carb cleaner
• Use a clean tray and take labeled photos during disassembly
• Replace only compatible carburetor models listed on the kit cross-reference
• Consider service manuals or diagrams for correct torque and alignment

Who is this for: The JLM MARINE 438996 Carburetor Repair Kit is aimed at DIY boat owners, marine mechanics, and fleet technicians who maintain Johnson and Evinrude 90–175 HP outboards and want an affordable way to rebuild carburetors. It's ideal for routine maintenance, troubleshooting fuel delivery problems, or stocking spares for multiple carburetors. If your engine shows fuel-related symptoms and the carburetor body is intact, this kit gives you the components to restore proper metering without replacing the entire carburetor.