Cummins/Onan — Routing Fuel Lines (Gasoline)
Installation
From a Cummins/Onan service manual covering: 5.5 HGJAA, 5.5 HGJAB, 6.5 HGJAA, 6.5 HGJAB, 7.0 HGJAA, 7.0 HGJAB. Check it applies to your exact model before use.
Applies to: Cummins/Onan HGJAA, Cummins/Onan HGJAB
Before you start
- Electric arcs can ignite gasoline leading to severe personal injury or death. Do not run wiring and fuel lines together.
Procedure
- Route the fuel line along bulkheads and frame members so it is protected; keep entire length visible for inspection.
- Support and protect fuel lines to restrain movement and prevent chaffing or contact with sharp edges, wiring, and hot exhaust.
- Use caution with P clamps and wire ties; do not over tighten which could crush the hose.
- Avoid kinks by making large radius bends around corners.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fuel line should be at or above the top of the fuel tank to reduce siphoning
- Maximum fuel pump lift is 914 mm (36 in)
Full service-parts list: Cummins/Onan HGJAA →, Cummins/Onan HGJAB →
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.