Cummins/Onan E125 / E140 — Fuel Pump Removal / Installation
Repair & overhaul · Impulse Fuel Pump
For the Cummins/Onan E125 / E140, from the Cummins/Onan service manual.
Applies to: Cummins/Onan E125, Cummins/Onan E140, Cummins/Onan E125H/E140H engine
Before you start
- Do not smoke or allow spark near the fuel system.
Procedure
- Close the fuel shutoff valve.
- Place a drip pan under the fuel pump and carburetor.
- Disconnect the starting battery, negative (-) cable first.
- Remove air cleaner cover and air filter assembly.
- Loosen screws securing fuel pump to air cleaner pan.
- Disconnect hoses and remove the pump.
- Installation is the reverse of removal; replace damaged fuel lines.
- Tighten all mounting hardware to Section 3 torques.
Source: Cummins/Onan 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.