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With the cav plate parallel to the bottom of the boat ( disregard what hole it is in) is the cav plate above, below or right at the bottom of the hull ? Once that height is set, now you can trim to get the best ride. Do you have a fact for the engine ? Don't over rev, or you might be buying...
If the motor is in good shape, then it is worth fixing everything, hoses, fuel pump, carb rebuild etc. Once everything is fixed it will run for years !
Neighbor has a hand pump for filling his atv's....that thing pumps fast, can pump a 5 gallon tank in just two minutes or less. Pouring can be dangerous, these new hand pumps are fast. Using 6 gallon marine fuel tanks with a hand pump sounds like the safest way to me.
Hopefully that will also strengthen the transom as well. That much weight and hp will weaken the transom over a short period of time. If you have any pics of the motor on the transom they might help us make sugestions.
OMC oil injection systems have had issues and I would not trust them. But the Merc units have been very reliable from my research. A friend is a retired marine mechanic, says he doesn't remember a Merc injection system failing unless abused. My 1992 injector systems all original and works...
Raise motor until cav plate is same height as boat hull....is cav plate level to boat hull, use long straight edge to check. How is motor trimmed ?
What is compression on both cylinders ? Why a two blade prop ? You need a tach to get real readings in motor performance.
Time for some maintenance and repairs....all of us boat owners have had those days ! Over many years of experience I have learned to take the time, spend the money, and do it right ! Pays off in the long run. The only thing I can address here is your boat going on crooked. With all the...
I prefer a piece of wood, but....in an emergency, I have used a rag tied into a couple knots and jamed between prop and cav plate, to get the nut tight.
Build the account so he gets more when you start withdrawing....I have done better over the past 35 years than anyone else I have talked to. Been very happy with my returns...
I have witnessed a transom fail at over 25 mph, outboard still attached, and running while it sank. Hull torpedoed into the river, gone in a flash. Not pretty....
My guy was up front right off the bat...hardly any. Yearly maintenance fee was 35 bucks, he gets a small fee when I make withdraws. Pocket change compared to what I could have lost. Fees should be discussed right at the start !
I would consider a LifePo4 battery, far longer run times between charging, lighter weight. I only charge my house battery after 3-4 all day trips....it runs everything except starting the main engine. And they recharge much faster.
Muffs should not be used to test a water pump. The pressure from the hose could create a false impression that the impeller was pumping when it is not. To test a water pump, a tank or back into the lake is necessary.