Fits for Volvo Penta and Indmar engines; Fits for Engines equipped with Delco EST Distributor;
Installation Instructions:1.Stop engine;2.Attach adapter (Volvo Penta P/N 885163-6 or OMC P/N 986662);3.Connect black wire of adapter to a battery positive source;4.start engine and run at idle speed;5.Set timing to specifications for your engine model;6.Remove adapter.