Cummins/Onan 5.0BF - 34 3E / S.OSF - 34 IE — Breaker Points Replacement (Cold Setting)
Maintenance
For the Cummins/Onan 5.0BF - 34 3E / S.OSF - 34 IE, from the Cummins/Onan service manual.
Applies to: Cummins/Onan 5.0BF - 34 3E, Cummins/Onan BF engine
Procedure
- Remove control box cover screws and cover.
- Disconnect wire from control box to ignition coil; remove front panel.
- Remove breaker box cover.
- Remove spark plugs to rotate crankshaft by hand.
- Remove points mounting nut and disconnect leads.
- Replace condenser and points.
- Rotate crankshaft clockwise to align 25° BTC mark; turn 1/4 turn more.
- Set point gap to .025 in; tighten nut and recheck.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- .025 in gap
- 25° BTC
Full service-parts list: Cummins/Onan 5.0BF - 34 3E →
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.