1950's Yachtwin Fisherman Challenge project! Need help

BilgeMonkee

Cadet
Joined
Jul 24, 2021
Messages
9
First post here - in an attempt to help my brother-in-law through the loss of his father (he was also my best friend) I thought it would be nice to get his fathers old Fleetwin running for him. Seemed simple at the time? When I finally got the Fleetwin in the shop I discovered the low end was unsalvageable. As luck would have it I spotted a similar looking motor at a yard sale thinking I could swap out some parts? The second outboard turned out to be a Fisherman.
When I got the Fisherman in the shop I realized the difference (the Yachtwin has larger CC and hence more HP), but they looked like they shared the same power head/lower unit interface?

So I dove in and put the nice clean Fleetwin power head onto the lower unit of the Fisherman. All seems to be ok there with nice new gaskets.

Put the water to it and pulled the cord.... after much sputtering and coughing I discovered I could not run it up to speed - I realized there was more going on here. Pulled the plugs; the lower one looked oily with gas but the top looked dry as a bone? What gives here?!? The compression feels really good/crisp when I pull the cord. The power head appears to be in excellent condition. I pulled the carb and it looked very clean but I super cleaned it anyway. Spark shows crisp on both cylinders.

Also - the old twin fuel/air lines tank system? The pump seems poor on that. Should I abandon that system and go with a single line?

Thanks in advance for any help here.... I have so much time in this project and really dont want to give up now!

Fleetwin Power head = 7520-03907
Fisherman Lower Unit = 5516-09224
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,226
So, did you go into the ignition? Does it have cracked coils?
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
38,462
Are you 100% sure both powerheads used the same gasket ?----The gasket between the powerhead and the exhaust housing ?
 

BilgeMonkee

Cadet
Joined
Jul 24, 2021
Messages
9
I just read on another thread to check the jet gaskets. When I was in the carb the main jet and needle gaskets looked oldish. I need to figure that out. also, maybe I need a new coil and points set. Shheeesssh. This is getting expensive!

But is sure is fun.
 
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