55 Evinrude

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Since my last post I really haven't had time to do much. Mostly just tinkering with it to get parts loosened up. I did manage to get the carb cleaned and rebuilt. Now I'm at the point where I want to convert it from the old pressure tank to a fuel pump. I did all my research and bought the parts. When I cracked it open I found this. It looks nothing like all the videos I watched. I'm thinking that I have to remove the part(circled), and cap one of the holes from the other side. Is this correct?
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I just rebuild the pressure tanks and run them. Super reliable set up. Everything that handles fuel is above the fuel level except when absolutely full. Diaphragm, gasket, and the sight glass seal is about all there is to it.
Did you use new seals, specially a new shift rod seal, when you went through the gearcase? If not you will be in there again. Just a hint.
 
I thought about keeping it original with the pressure tank but I've been unable to find one at a reasonable price. So I'm moving forward with the conversion.

Every seal from the impeller down is new so hopefully I won't be back in there anytime soon. I've also replaced points, plugs, wires, condensers, and coils. Only thing I'm a little concerned about is the gap and timing. It might be off a bit but I won't know for sure until I can get the conversion done.

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