Cummins/Onan M-1600-2 — Replacing and Adjusting Breaker Points and Condenser
Adjustments · ignition system
For the Cummins/Onan M-1600-2, from the Cummins/Onan operator's manual.
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Before you start
- Ignition adjustments should be made with engine static and cold
- Make sure feeler gauge is clean and free of grease, oil or dirt
Procedure
- Disconnect negative battery cable at battery terminal
- Remove breaker box cover clip and lift off cover
- Remove spark plugs to allow easy rotation of engine and generator
- Using 3/8 inch hex socket driver, turn rotor through-bolt clockwise until breaker point gap is open maximum
- Remove condenser mounting screw, disconnect condenser and ignition lead wires, lift out condenser
- Remove breaker points mounting screws and lift out point assembly
- Replace condenser and point assembly in reverse order of removal
- Adjust set screw with allen head wrench to specified gap; measure with flat thickness gauge
- Replace breaker box cover, spark plugs and leads; connect negative battery cable
Tools required
- 3/8 inch hex socket driver Amazon
- socket wrench Amazon
- allen head wrench Amazon
- flat thickness gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Breaker point gap: see SPECIFICATIONS section
- Timing is fixed by point gap adjustment
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.