Does any one have the stock tach for '83-'86 interiors? I got one from a F650 with a 8.3 cummins and it doesn't work. The tach only goes to 3500 RPM. The IDI tachs got 4500??? Anyway, it doesn't work with the IDI stuff. Try'ed three different senders, one of which is brand new. Anyway, I think the issue is with the tach itself. I'm guessing the signal is wrong for the F650 tach. I love to buy one for the '83-'86 if anyone has one they don't need.
Heath
Heath