Carb troubleshooting

[wtm442]

Secondary float adjustment same as the primary float except for one important bit of info.

If the secondary float is too low, use the steps above for the primary float level.

If the secondary float level is too high, you cannot use up the gas just by running at idle. You have to get the secondaries to open up. That means taking the car or boat out for a ride and floor it a few times.

Of course, if you feel brave, just remove one of the lower float bowl screws and let the gas drain into a cup. You probably will have to make a special cup if the carb bowls are close to the manifold. Then replace the screw. Now start the engine and let it run for a few minutes if you have a mechanical pump.

On the other hand, if you have an electric pump, just turn on the pump without starting the motor.

Repeat the steps for the secondary bowl until the levels are correct.

Now take the boat or car out for a 10 minute cruise. Make sure the secondaries are opened up a few times.

Now check the level again, but with the engine running. Many novices make the adjustments too quick or over-adjust. This last step is important, just to check your work with the floats before you move on the acc pump adjustments, jet changes and secondary actuation changes.