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Home›Repair guides›Cummins/Onan›Breaker Points and Condenser Replacement

Cummins/Onan — Breaker Points and Condenser Replacement

Repair & overhaul · Ignition breaker points

From a Cummins/Onan service manual covering: 2.5 MAJB-53BR, 2.5 MAJB-53CR, 3.0 MAJB-1R. Check it applies to your exact model before use.

Applies to: Cummins/Onan MAJ, Cummins/Onan MAJB engine

Before you start

  • Make adjustments with engine static and cold

Procedure

  1. Disconnect the negative (-) battery cable at the battery terminal.
  2. Remove the breaker box cover clip and lift off the cover.
  3. Remove the condenser mounting screw, disconnect the condenser and ignition lead wires, and lift out the condenser.
  4. Remove the breaker points mounting screws and lift out the breaker point assembly.
  5. Replace the condenser and point assembly.
  6. Adjust the points as described in the adjustment procedure.
  7. Replace the breaker box cover, spark plugs, and spark plug leads.
  8. Connect the negative (-) battery cable to the negative battery terminal.

Tools required

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Full service-parts list: Cummins/Onan MAJ →

Source: Cummins/Onan service 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.

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