macawman
Well-known member
I'm working on converting my 1956 Johnson 10hp from an old duel line/pressurized tank system to a single fuel pump system. The obvious solution is to replace an existing bypass cover with the plate and pump from a post-1962 model that was manufactured with a fuel pump. Unfortunately, it seems those parts are not to be found so I'm looking at other options. Particularly, those detailed in this article. https://www.leeroysramblings.com/Converting_dual_fuel_line.htm
One option is to fill the void in the existing bypass cover (picture below) with liquid steel to create a flat surface to mount a pump on.
The second option is to replace the existing bypass cover with a flat plate (picture below) on which the pump can be mounted.
This is the option I prefer but I'm concerned about the inset area of the existing cover not existing. This inset conforms to the curvature of the cylinder.
Would the lack of the inset on the flat plate effect engine performance or otherwise cause problems?
One option is to fill the void in the existing bypass cover (picture below) with liquid steel to create a flat surface to mount a pump on.
The second option is to replace the existing bypass cover with a flat plate (picture below) on which the pump can be mounted.
This is the option I prefer but I'm concerned about the inset area of the existing cover not existing. This inset conforms to the curvature of the cylinder.
Would the lack of the inset on the flat plate effect engine performance or otherwise cause problems?