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Compatible — Protect an engine that will be out-of-service for more

For these models: CCK, CCKA, CCKB.

Procedure

  1. Run engine until thoroughly warmed up.
  2. Turn off fuel supply and run

Source: manual:927-0754_Onan_CCK-CCKA-CCKB_Spec_A-J_Engine_Service_Manual_03-1986_text.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.