Kohler Ford LSG-423 — Fuel Pump Capacity (Volume) Test
Testing & diagnosis · Fuel System
For the Kohler Ford LSG-423, from the Kohler service manual.
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Procedure
- Operate the engine at the specified idle rpm
- Open the hose restrictor and expel fuel into the container while observing the time required to expel one pint
- Close the restrictor
- If the pump volume is below specifications, repeat the test using an auxiliary fuel supply and a new fuel filter
- If volume meets specifications with the auxiliary supply, check for a restriction in the fuel supply from the tank and for the tank not venting properly
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Minimum volume flow 1 Pint in 25 Seconds
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.