Reply To: 50’s 18hp OMC retrofit question

[Seahawk]

@ shoestringmariner .Going back to your main concern where you have an oily mess on your transom after an outing. These vintage motors up until the 70’s discharge there unburned fuel which lucubrates the bears in the crank case right out into the exhaust output and into the water. This is more noticeable at lower speeds. On your motor right behind the intake housing and on the lower left-hand side of the crank case is a drain valve which controls this action and is activated on the downward stroke of the piton. If you block the hole which this raw fuel is flowing and drill a hole on the side of the leaf plate by the lower lower cavity cut out for this fuel to flow. You could redirect the fuel back into the boat and into a container and reuse it. The drilling of the hole in the leaf plate would have to be precise due ti its thickness. Then you would have to insert a thin wall tube and epoxy it into place. This is where a hose could be connected and back to your onboard tank..

Just a thought!