This is a basic guide on how to clean and rebuild Mercury WH WMH WMV series outboard carburetors:
Tools Needed:
Screwdrivers, wrenches
Carburetor cleaner
Compressed air
Rebuild kit (gaskets, needles, etc.)
Clean rags, small brushes
Steps:
Preparation:
Work in a ventilated area; wear safety gear.
Disconnect the fuel lines and remove the carburetors from the engine.
Disassembly:
Remove the float bowl, float, and needle.
Disassemble jets, screws, and other removable parts, keeping track of each.
Cleaning:
Soak metal parts in carburetor cleaner to remove residue.
Use brushes, wire, and compressed air to clean passages and parts.
Rinse and dry thoroughly.
Inspection:
Check all parts for wear or damage; replace as needed.
Ensure the float is intact and buoyant.
Reassembly:
Install new gaskets and seals from the rebuild kit.
Reassemble parts in reverse order, setting the float height to (level on the WMV WHM) (or WH hanging down 1/32") relative to the bowl.
Tighten all screws and bolts securely.
Final Checks:
Ensure the float moves freely, and the needle valve functions correctly.
Set mixture screws to baseline settings (1 and 1/2 turns out on the WMV WHM)
Reinstallation:
Reattach the carburetors, reconnect fuel lines and linkages.
Start the engine, allowing it to warm up, and adjust idle settings as needed.
Always refer to the service manual for specific details (available for download on this site), and work methodically to ensure accuracy. This process will help restore carburetor function and improve engine performance.
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