The WMC carburetor is a common type of carburetor used on Mercury Outboard engines. Over time, these carburetors can become clogged and dirty, which can lead to performance problems. Rebuilding a WMC carburetor is a relatively simple task that can be done with basic tools and knowledge.

Tools and Materials Needed

  • Carburetor rebuild kit
  • Screwdrivers
  • Wrenches
  • Sockets
  • Carburetor cleaner
  • Compressed air
  • Shop towels
  • Safety glasses
  • Gloves

Instructions

  1. Disassemble the carburetor. Start by removing the float bowl. Then, remove the main jet, pilot jet, and idle mixture screw. Be careful not to lose any of the small parts.
  2. Clean the carburetor. Use carburetor cleaner to clean all of the carburetor parts. Be sure to pay special attention to the jets and orifices. Once the parts are clean, rinse them with water and blow them dry with compressed air.
  3. Inspect the carburetor parts. Look for any worn or damaged parts. If you find any, they will need to be replaced.
  4. Reassemble the carburetor. Start by installing the float bowl gasket. Then, install the float bowl and float. Next, install the main jet, pilot jet, and idle mixture screw. Be sure to tighten all of the screws and bolts to the specified torque.
  5. Adjust the carburetor. Once the carburetor is assembled, it will need to be adjusted. The specific adjustment procedures will vary depending on the carburetor model. However, most WMC carburetors have a single idle mixture screw that can be adjusted to achieve the desired idle speed and air/fuel mixture.

Tips

  • Be careful not to lose any of the small parts when disassembling and reassembling the carburetor.
  • Use carburetor cleaner to thoroughly clean all of the carburetor parts.
  • Inspect the carburetor parts for wear and damage. Replace any worn or damaged parts.
  • Tighten all of the screws and bolts to the specified torque.
  • Adjust the carburetor according to the specific adjustment procedures for your carburetor model.

Troubleshooting

If you are having problems rebuilding your WMC carburetor, here are a few tips:

  • Make sure that all of the parts are clean and free of debris.
  • Check the float bowl gasket to make sure that it is not torn or damaged.
  • Make sure that the main jet, pilot jet, and idle mixture screw are installed correctly.
  • Tighten all of the screws and bolts to the specified torque.
  • Adjust the carburetor according to the specific adjustment procedures for your carburetor model.

If you are still having problems, consult a qualified marine mechanic for assistance.