Power Solutions International — Inspect Fuel Shut-Off Valve for Leaks
Testing & diagnosis · Fuel lock-off valve
From a Power Solutions International owner's manual — check it applies to your exact model before use.
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Procedure
- With engine off, remove the plug from the test port on the lockoff closest to the EPR.
- Connect a pressure gauge capable of reading inches of water column.
- There should be no pressure between the lockoff and the EPR with the engine off.
- If pressure rises with the gauge installed, the lockoff is leaking and must be replaced.
Tools required
- Pressure gauge (inches of water column) Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- No pressure between lockoff and EPR with engine off
Source: Power Solutions International owner's 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.