Kohler L600 / L654 — Gasoline Fuel Pump Rebuilding

Repair & overhaul

For the Kohler L600 / L654, from the Kohler service manual.

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Procedure

1. Scribe matching marks on fuel head and pump body before disassembly.
2. Remove cover capscrew and cover; discard cover gasket.
3. Remove 6 screws from perimeter of fuel head, separate head from body, press old fuel valves out and discard valves and gaskets.
4. Disassemble pump body: compress pump arm spring to remove, compress diaphragm spring, remove diaphragm and oil seal.
5. Push pin out to release pump arm and link.
6. Wash fuel head, body and cover in gasoline and clean with stiff bristle brush.
7. Recondition: press new valve gaskets and new valves into fuel head, install new cover gasket and cover.
8. Install link and pump arm, stake new pin, install new oil seal, spring and new diaphragm assembly.
9. Reinstall pump body assembly with new gasket; position fuel head with scribe marks aligned and temporarily tighten six screws about three turns.
10. Turn engine until diaphragm pulls down into body, securely tighten six screws and reconnect fuel lines.

Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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