Cummins/Onan — Changing Engine Oil and the Oil Filter
Maintenance · engine oil/filter
From a Cummins/Onan operator's manual covering: 13GSBA-6711, 13GSBA-6712, 13GSBA-6718. Check it applies to your exact model before use.
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Before you start
- Disconnect negative battery cable and place switch in Stop before starting work
Procedure
- Run generator set until warm, shut down, place pan under drain hose.
- Open drain valve and reclose when oil stops draining.
- Spin off oil filter canister and clean mounting surface.
- Install new filter with gasket lightly oiled, turn additional 1/2 to 3/4 turn.
- Refill with 1.7 quarts (1.6 liters) of oil.
- Start and run for 30 seconds.
- Shut engine off and wait 30 seconds.
- Add more oil slowly to bring level to FULL mark.
- Dispose of used oil and filter per local regulations.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 1.7 quarts (1.6L)
Source: Cummins/Onan operator'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.