[Jerry]

Here are the pics:

[Jerry]

Hi Tony, thanks for your reply. The boat is a 1998. I don’t know where to find serial or ID numbers. It has a Delco alternator. I believe(d) it was alternator driven because the wiring diagram shows it that way and there were three wires coming out of the field plug and only one grey signal wire to the VDO tach. I just discovered that the three-wire field connector has only 2 corresponding terminal coming out of the alternator. I have 3V ac on the grey wire at the tach at idle. Am I hearing you say that this engine should have a crankshaft sensor signal for the alternator? I haven’t been able to find one, but the installation doesn’t provide much access.

[Author]

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