Cummins/Onan 6.5NH - 3CR / 6000 A — Ignition Timing - Engine Not Running (Standard Pressure Cooled)
Adjustments · Ignition system
For the Cummins/Onan 6.5NH - 3CR / 6000 A, from the Cummins/Onan service manual.
Applies to: Cummins/Onan NH engine
Procedure
- Connect a continuity test lamp across the ignition breaker points; one prod to the breaker box coil-lead terminal, the other to engine ground.
- Turn the crankshaft counterclockwise until the points close, then slowly turn clockwise.
- The lamp should go out just as the points break, which is the ignition point at 22 degrees BTC.
Tools required
- Continuity test lamp set Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Timing 22 degrees BTC
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.