Cummins/Onan 1B Series — Starting the plant manually
Operation · Engine
For the Cummins/Onan 1B Series, from the Cummins/Onan owner's manual.
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Procedure
- Pull choke out all the way.
- Wind starting rope clockwise around rope sheave.
- Give strong steady pull full length of rope.
- If no start, push choke in as required and repeat.
- As engine fires, push choke gradually in until fully open when warmed up.
- When warm, choking not necessary.
- Over choking causes hard starting and excessive wear.
Tools required
- starting rope Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Cummins/Onan owner'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.