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Home›Repair guides›SPARK PLUGS

Cummins/Onan — SPARK PLUGS

For these Cummins/Onan models: Contractor, UN Revolving Armature, 4-Pole.

Applies to: Cummins Onan Contractor

Procedure

  1. Keep the battery case clean and dry.
  2. Make sure the battery cable connections are
  3. Coat the battery terminals with a mineral grease
  4. Identify each battery cable to be positive or nega-

Tools required

  • mineral grease or petroleum jelly

Source: manual:940-0120 Onan NH (spec P) Genset Operators manual (10-1983).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.