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Cummins/Onan — Check the condition of the starting batteries at least

For these Cummins/Onan models: WF, WK.

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Procedure

  1. Check all fuel and oil lines for possible leakage.
  2. Inspect exhaust lines and mufflers for possible

Source: manual:948-0304 Onan WF WK Instruction and Parts Manual (2-1970).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.