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  1. Simplicity/Allis Chalmers Forum
    After replacing both ignition coils on Kohler CH740 the tach needle sits on 4000 RPM engine running. Key on engine off tach sits at 0 RPMthen while cranking and engine start the tach climbs to 4000 while actual engine RPM is at base idle. What is the tach input signal? Thinking about installing...