I have a 1971 60 HP Johnson that wont under load...the engine sat for a number of years...I have taken the carbs off and cleaned them...In addition to changing out a number of bad wires...I can start the engine very easily...and in a deep tank run the engine in neutral up to high rpms...pumps water because I changed the pump...but when I shift in to gear it shifts fine...and will run across the lake at slow speed...but when I try to give more gas..it bogs down and stops...I have the Seloc manual..but I am missing something...any help would be greatly appreciated...thanks