Ford LSG 875 — Fuel Pump Pressure and Capacity (Volume) Test
Testing & diagnosis
For the Ford LSG 875, from the Ford service manual.
Browse Ford generators & specs →
Before you start
- Do not smoke or carry lighted tobacco or open flame when working on or near any fuel related component.
Procedure
- Remove air cleaner; disconnect fuel inlet line or fuel filter at carburetor.
- Connect pressure gauge, restrictor and flexible hose between fuel filter and carburetor.
- Position flexible outlet hose and restrictor to discharge into a graduated container.
- Operate engine at specified idle RPM and vent system into container by opening restrictor momentarily.
- Close restrictor, allow pressure to stabilize, note reading.
- If pressure within specification, open restrictor and time how long to expel one pint into container.
- Replace pump if pressure or volume is not within specifications and lines/filter are satisfactory.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fuel pump static pressure 6.0-8.0 @ 500 rpm
- Minimum fuel pump volume 1 Pint/20 Sec.
Source: Ford 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.