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Home›Repair guides›Testing Spark at Spark Plug

Cummins/Onan 1B Series — Testing Spark at Spark Plug

For the Cummins/Onan 1B Series.

Applies to: Cummins/Onan 1B Series

Procedure

  1. Remove spark plug shield.
  2. Disconnect cable.
  3. Hold 3/16 inch from plug.
  4. Crank engine.
  5. Check for spark jump.

Specs & torque values

  • 3/16 inch gap

Source: manual:901-0025 Onan 1B-series Genset Instruction manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.