4x4 Carburetor Maintenance & Repair Basics

Once the carb is off the manifold, look for anything out of the ordinary. If it's dirty and gummed up, it may be necessary to completely disassemble it and carefully clean it. This Holley carb wasn't that dirty so we just stuck with the gasket repair in the primary float bowl. When you are cleaning the old gasket off any surface, take great care not to gouge the metal. You can dry the carb and blow out any old material with your air hose. Hold the air nozzle laterally to any part so you don't blow any old material into the ports and passages. There are chemical gasket strippers available but inevitably you always end up manually scraping off some of the old gasket. Using a plastic scraper is also a safe way to make sure you don't damage any parts.

With the new gaskets and metering plate in place, the bowl is ready to screw on. After that you can reinstall the accelerator pump. Be careful not to overtighten the screws or you will spend more time trying to tap the screw holes.

Make sure you clean the intake manifold thoroughly and install a new gasket. While the carb is removed, it's a good idea to stuff the intake ports of the manifold with clean rags. This will keep any nuts, bolts, and old gasket material from dropping in. If something falls in, you just added hours to your minor carb repair. Installation of the carb is just the reverse of its removal: easy. Just be sure not to overtighten anything.

Upon reassembly you can use an old hot-rod trick and very lightly coat the gasket with Chapstick. This keeps the gasket from sticking if you need to remove it again, especially if you are a tinkerer and keep playing with the jets.

Adjustment of the accelerator pump is critical and needs to be exact. There are many theories on the adjustment, but we feel that it should have some play so the lever won't be bent. The arm should move when the accelerator pump cam moves but should not be too tight.

This is a common carburetor repair we completed. But what we are really telling you here is don't be afraid to get your hands dirty and work on your own junk. As with all things mechanical, there are literally hundreds of things that can go wrong and thousands of fine-tuning adjustments that you can make.