Reply To: bypass cover for a Johnson AD-10

[Don]

First, I think you must plug one of the hole, but then remove the other check valve, so the pump will get both negative and positive pulses….
I don’t think there is another engine with a bypass cover that will fit the 7.5hp, unfortunately. You might take one of the covers to a welding shop and have them build up the surface of the outstide of the bypass cover so it is flush with the outer edge. This way, you can drill the two holes that are threaded for mounting, and you can drill a third hole directly through the cover for the pulse, then mount the small pump using the standard fuel pump gasket, just like on later style engines….