I bought a 74 evinrude 35 hp from a buddy who took me out on it several times before the purchase. I did everything wrong. Added gas with no oil. I dont know the oil ratio. Motor locked up and he pulled me in. Added oil and the motor sounds good, but i guess i was kikn it in gear too high throttle. Now the lower unit is in a bind and when i attempt to put in fwd it dies. This model has a solid cast lower unit so i cant open. What year and what horsepower is interchangeable with mine? Motor sounds good. I have no boating experince. Help me get it running plz

