In reverse my 20hp Johnson came out of the water in reverse because in did not have it locked and possibly over reved . Two issues, oil drained from middle lower hole on shaft. This appers to be lower unit oil. Might need to replace seal? Bigger issue I have no spark. Moter ran great before this. Fuel and compresion ok. Cranks over fine. Points and condenors visaully look fine. Where to go from here? model 20R73-A or 20R75-A ser. E332735
