MerCruiser 39670A22 Shift Interrupt Neutral Kill Switch 120hp 140hp 165hp 77-82 steering wheel This had good spark during

This had good spark during testing

MerCruiser / Ford 470 488 170hp 3

1987-1993 Used 315781 / 3852137 Which was usually stamped 315781 and is physically different

GM Part stamped # usually GM 2768972-2 (this is the earlier version that does not have holes for triangle coupler only found on Pre-1983 models with hub style coupler) or GM 3790366 (later version with the holes for perimeter mount triangle coupler)

The Part Number of the Head Bolts 10-F2254

MerCruiser 39670A22 Shift Interrupt Neutral Kill Switch 120hp 140hp 165hp 77-82 steering wheel This had good spark duringItem Details MerCruiser McGill Shift Interrupter Neutral Safety Shift Cut Out Kill Switch 39670A22 39670A5 Tested & working! A tear in the shrink tubing around the connections, but this was pretty common on all of these that I have processed & seen because of how they oriented the soldered wires coming off of the tab connections in conjunction with how the wires were typically routed. Applications Generally found on In line engines late 1970's through