Cummins/Onan — Starting at Set
Operation · Generator set
From a Cummins/Onan operator's manual covering: 5.0 MDKUB, 6.0 MDKUB, 7.5 MDKWB, 9.0 MDKWB. Check it applies to your exact model before use.
Applies to: Cummins/Onan 5.0 MDKUB, Cummins/Onan 6.0 MDKUB, Cummins/Onan 7.5 MDKWB, Cummins/Onan 9.0 MDKWB, Cummins/Onan MDKUB, Cummins/Onan MDKWB, Kubota Z482B engine, Kubota D722B engine
Before you start
- Preheat longer than 30 seconds may damage glow plugs.
- Excessive cranking can overheat starter.
Procedure
- Hold starting switch to STOP/PREHEAT for 10 to 30 seconds depending on temperature.
- Release switch, then move to START.
- Starter cranks and engine should start. Starter automatically disconnects when AC voltage builds.
- If engine does not start after 30 seconds cranking, release switch, wait two minutes, repeat preheat.
- If engine does not start on second try, check fuel supply and ensure fuel system primed.
Specs & values
- Preheat time: below 32°F (0°C): 30 seconds; 32-50 FridayParts $410.95°F (0-10°C): 20 seconds; 50-86 FridayParts $29.99°F (10-30 FridayParts $28.40°C): 15 seconds; above 86°F (30°C): 10 seconds
Full service-parts list: Cummins/Onan 5.0 MDKUB →, Cummins/Onan 6.0 MDKUB →, Cummins/Onan 7.5 MDKWB →, Cummins/Onan 9.0 MDKWB →, Cummins/Onan MDKUB →, Cummins/Onan MDKWB →, Kubota Z482B engine →
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.