MANY thanks to Crosbyman for digging up the schematic! Now, am I reading this right. It looks like if I close the purple with white and black with yellow that come off the switch, I should at very least see spark at the plugs providing the speed controller is functioning in its neutral position. Also, it looks like the S marked switch terminal white wire is the power to starter.
As far as putting battery power to the key switch, What I want to do is just do what the key would do in the run position by jumping the purple with white power lead to the M terminal, then momentarily power the S terminal of the starter. That should turn the engine over with spark. As long as the shift selector is in neutral, there is no need to power the A terminal on the switch.
I have zero experience fiddling around with engine controls like this so please jump in and correct me if I have gone off track with this assessment. I have no intension of getting involved with cleaning the carburation on this engine and checking the various components for proper function. I just want to be honest about how far the engine is in its possible working state. On top of the fact, this wont fit in my garage with the engine in place. Its got to go. The boat looks like it's floor was redone at some distant past but needs to be pulled up and a full hul inspection and update done. While I have some of your guys attention, I would like anyone's opinion on what is a good reliable relatively new engine and control to replace this with that is the gold standard in parts replacement and reliability. The Boat is OAL of 16' and weighs in at about 500 lbs with its tri hul design. No intension of pulling water ski's. Just a nice quiet fishing and lounging around engine of about 35 or 40 hp. The past owner bolted what looks like an aluminum trolling motor base plate to the front of the boat.
