Cummins/Onan — Starting - Manually Cranked Models
Operation · crank / fuel pump
From a Cummins/Onan operator's manual covering: 5JB, 601JB, 6JB, 6OLJB, 705JB, 705JB-3, 705JB-3CR, 705JB-4XR, 706JB, 7JB. Check it applies to your exact model before use.
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Procedure
- Work fuel pump priming lever 15 strokes; return lever to down position.
- Adjust carburetor manual choke as required by starting temperature.
- Engage crank and pull upward quickly.
- Remove the crank immediately when plant starts.
- Open choke gradually until wide open.
Specs & values
- Oil pressure must be at least 20 pounds
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.