well here goes again,,, 1986 454 inboard rebuilt last year everything new ..i went to the boat today ran a temp gas tank inside the bilge with some carb/choke cleaner in it and fresh 93 gas ran engine for awhile also sprayed some cleaner ,,i did all this thinking my problem was gummed up carb from not using stablizer,,anyway engine sounded good,,hook main tank line back on go for a ride,,,15 minutes boat running smoothly 3500 rpm sounds good,, at half throttle,, i ran it steady for the 15 minutes,,cut throttle back engine starts to do the hesitation thing,,kinda pause or a skip thing,,2000-2500 rpm feel it skip turn boat around head back try open throttle,, should be 4200..goes up to 3500 can feel its not right then gets like an energy boost jumps to 4100 sound good smooth then very quickly goes back to 3500 for a few seconds jumps back and forth but mainly will not stay on the nice 4100 rpm side,,put another load of fresh gas in today,,fuel filter emptied and check several times plugs pulled looked ok cap and rotor looked ok inside,,if it was fuel problem why would it go well in the begining then act up,,if electrical where do i start??thunderbolt ingition,,the electrical box that is mounted on the riser can this go in and out???
