1969 Evinrude 40 HP Big Twin, Lark Service Repair Manual P/N 4596, Page 39Get this manual

1969 Evinrude 40 HP Big Twin, Lark Service Repair Manual P/N 4596, Page 39

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Be sure that the single upset mark on the side of the key is facing downSee Figure 4-18 Incorrect installation of the key will affect cam position and will result in late (retarded) ignition timing Fi