Home › Forum › Ask A Member › Cylinder head shocking me 1957 35hp evinrude › Re: Cylinder head shocking me 1957 35hp evinrude
Well, I can fathom the slim possibility that the head is somehow partially insulated from the block due to excessive paint/sealer….But, if this was the case, I can understand that shock because you are helping to complete the circuit. But, following this scenario, the ignition wouldn’t be killed, only improved, because your body is helping to complete the ground circuit. Perhaps the primary side of the ignition is partially grounded to the mag plate. The mag plate is not well grounded on these engines, touching the block helps complete this primary short to ground which kills the engine…But, this would probably only affect just one bad cylinder’s ignition circuit….
This kind of reminds me of a 2hp problem I had once. The mag plates on those OMC 2hps are pretty well insulated from the block with a plastic bushing, there is a ground strap that is supposed to complete the secondary circuit but its ground connection was weak/rusted.
The only time I would get shocked was when I touched the aluminum throttle lever, I guess I was helping to complete the secondary circuit.