I don't have either. I'd like to have a service manual for it, but can't find one. Found the clue on this forum here:
https://www.yamahaoutboardparts.com/forum/general-discussion/yamaha-outboard-forum/24040-can%60t-find-choke-system-on-50-hp-2stroke-1989-motor/page4
PROBLEM SOLVED!
Turns out it's user error. There is a solenoid valve (#41 in the picture above) attached to the lower carburetor that activates when the toggle switch near the key is switched on. It injects a bit of fuel to help get it started. From what I've learned, my model is between models...
Mine doesn't have the fuel enricher PrimeStart attached to the carbs like I've seen. Pic to show...
Good point about the Fast Idle lever. I left it down and tried it up just a bit and same result - no start.
CaptnKingFisher - thank you, that test sequence is helpful. I will perform those tests shortly. I have tried using two separate fuel tanks. Both tanks were delivering fuel a couple weeks ago when I first ran the boat.
99yam40 - yes, cowling is off and the silencer. The switch does activate...
Forgive my terminology.
I meant the Prime Switch was clicked up (it returns back to the same position after being clicked up) with the fast idle lever up.
Sorry, I've never owned a Yamaha before, so this is new to me.
Hello everyone - thank you in advance for your input. Would love to hear some suggestions & ideas as I'm out of them now. I suspect a fuel issue, but can't sort it out. I'm a backyard repair guy for small engines at best.
MOTOR: 1990 Yamaha Pro50 2-Stroke, Model Type Code: 6H5 / Model 50D...
