4.3 some kind of problem

jpatire

Recruit
Joined
Jul 5, 2011
Messages
1
i bought a boat that needed a 4.3omc. i got a truck engine out of bone yard swapped everything over. i put it in got it running.i put it in water idles smooth can rev up in nuetral no problem. now under load at about 2800 it sounds like its breaking up and the at full throttle im only getting maybe 3300 rpm. it feels weak on mid to top end. i did use a random 12 volt coil for auto being nobody stocks omc by me.its a 2 barrel holley i disassembled and cleaned. i switched to electric fuel pump, changed plugs ac delco mr43 changed fuel/water seperator filter. timings at 6 degrees. im thinking coil or module in distributer. its a prestolite breakerless. any help would be great. first boat would like to have some fun.
 
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