1995, 115 horse Johnson

[tsubaki]

THANKS Ferm!
I'm assuming the optic sensor is the crank position sensor (gotta help me out here, if not, let me know).
Only 1 run was attempted without the cowl on, the transducer sprayed water, that defeated that. Haven't removed the cover to the sensor over the flywheel (waiting for the part to arrive).
How in the Devil is it light impulsed?? I figured it would be magnetic.
And what in the world is a PRV meter, man, I've been out of the loop a while!
Do have a timing light though!

We are about to the stage of just replacing parts till it stops acting up.