REMOVAL & INSTALLATION
4-121, 4-150, 6-232, 6-258, 8-304, 360 and 401 Engines
See Figures 1, 2 and 3
All these engines have a throwaway cartridge filter in the line between the fuel pump and the carburetor. To replace it:
- Remove the air cleaner as necessary.
- Put an absorbent rag under the filter to catch spillage.
- Remove the hose clamps.
- Remove the filter and short attaching hoses.
- Remove the hoses if they are to be reused.
- Assemble the new filter and hoses.
The original equipment wire hose clamps should be replaced with screw type band clamps for the best results.
- 1975 V8 and all 1976 and later filters have two outlets. The extra one is to return fuel vapors and bubbles to the tank so as to prevent vapor lock. The tank line outlet must be up.
- Install the filter, tighten the clamps, start the engine, and check for leaks. Discard the rag and old filter safely.
See Figure 4
The filter is located behind the large inlet nut in the carburetor. It is a small, paper, throwaway type.
- Place an absorbent rag under the carburetor inlet nut.
- Hold the inlet nut with one wrench, while loosening the fuel line fitting with another. Remove the fuel line.
- Unscrew the inlet nut and remove the nut, washer, spring and filter.
- Installation is the reverse of removal. It's always best to use a new washer. Coat the threads of the inlet nut with a non-hardening, fuel-proof gasket cement. Do not overtighten the inlet nut! The threads are easily stripped in the carburetor. Hold the inlet nut with a wrench while tightening the fuel line fitting.