REMOVAL & INSTALLATION
A paper filter element is located behind the carburetor fuel line inlet nut. The filter should be replaced every 12 months or 12,000 miles whichever occurs first. To replace the filter:
- Place an absorbent rag beneath the fuel line connection to the carburetor to absorb any spills.
- Disconnect the small fuel line connection nut, using a flare nut wrench, while holding the large fitting nut with a standard open end wrench.
A flared nut wrench is preferred over a standard open end wrench since it will not slip off and round off the corners of the tubing nut.
- Remove the large filter retaining nut from the carburetor. There is a spring behind the filter. Remove the filter and spring.
- Install the spring and filter gasket.
- Install the new gasket on the retaining nut and screw it into place. Do not overtighten; the threads are rather soft.
- Install the fuel line.
- Discard the gas-soaked rag safely.
The fuel filter element should be replaced every 30,000 miles. To replace the filter element:
- Disconnect the negative battery cable.
- Disconnect the water sensor lead at the bottom of the filter, then disconnect the water filter to main body hose.
- Remove the filter element by turning it counterclockwise using a filter strap wrench. Be careful not to spill any fuel.
- After draining the filter, unscrew the water sensor from the bottom of the element.
- Install the sensor in the new filter after applying a thin film of diesel fuel to the sensor O-ring.
- Clean the filter mounting surface, applying a thin film of diesel fuel to the gasket on the new filter and install the filter. Continue turning the filter an additional 2 / 3 turn after it contacts the filter main body.
- Connect the sensor wire. Disconnect the fuel outlet hose from the injector pump and place in a suitable container, then operate the priming pump handle several times to fill the filter with fuel. Reconnect the hose to the injector pump and start the engine to check for leaks.