I have two outdrive assemblies. both are gen1. The difference is the spare one has these two bolts on top and my current one does not. The current one is faded and pitted from being in the water for long periods of time. I'd like to use the donor with the two additional bolts. Is this the only change? They are interchangeable, correct? I would just drill the holes through the transom. Would be a better setup since it has more bolts and the it will definitely be sturdier.
Item #20. Why is there a rubber grommet between the bolt head and the anode?
Ayuh,..... The Gen.I Alpha does Not have those studs,......
Yer spare must have started out life as a Gen.II,.....
Ayuh,..... So it'll come Off, when necessary,.....
Boat engine cams have a different lift and duration than automotive cams. They also use brass freeze plugs, stronger valve springs, and marine accessories like starter, distributor, carb, alternator, water circ pump. It is unsafe to use non flash proof automotive parts in these areas from automotive. They get more power because of mainly water cooled exhaust, sometimes bigger valves, and more air flow.
I splashed today. Everything seemed good with all being water tight. The boat only got to 3000rpm wot. Maybe need another prop with a 19pitch. It reved up to 4000 without the prop engaged.
They are 4400-4800 typical wot from mercruiser.