I have purchased a boat that has a 75 evenrude on it there is nobody in my area that seemes to know how to work on this moter it will start with a lot of trouble.It then runs on 2 cyl.#1 and 3 there is fire at each cyl.the compression is 95 on every one i took the carbs off and cleaned and cleaned the fuel pump.I have two of these engins and I have inter changed the carbs still works porley is there some one that might have the ability to help me i would greatley appricate it.