Hello, looking for any help on this. My 1975 rude 115 V4 is only running on the top left cylinder. This is gonna be kinda long but for you guys to better under stand whats been going on, let me explain. I have been painstakingly restoring my 1975 Renken bowrider for the past year and a half. Before last month, the last time it was in the water was OCT 03 and has been garaged most of the time. Got everything done and started the motor, ran kinda rough, but started pretty good. Decided to use some de-carb and followed the directions to a T, a lot of goo came out and smoked at first, but ran great after that (in the driveway). Took her out for the first time, started good(fresh gas and oil 50:1 mix) Only problem waas slow power when put in gear (hesitation) and noticed when she did get to WOT she would surge some, didn't think anything of it. Second trip out, started good, but took about 5 tries to get here in gear without dying, finnaly got going, only noticible problem was surging. Third trip, never left dock, would die everytime I put her in gear, got to ckecking things out before I left the water. Now would not start with out being choked (even when warmed up)Once I took the choke off she would run for approx 10 seconds and die, could tell fuel was not being sucked threw fuel pump. Got home refered to SELOC manual, said surging was sign of bad fuel pump so I changed the pump with a new OMC part, thought and hoped that this would fix the problem. Well it sort of did, no the motor (once started) would run with the choke off but still die in a low idle or while being put in gear everytime. She sounded smooth though. Decieded to do some troubleshooting to make sure all 4 cyl. were fireing. Started pulling plug wire while running to see if they all were good (should here a change) . Pulled top right #1 = nothing happened, pulled bottom right =nothing, pulled top left = engine died out. Replaced top left plug, and restarted motor, went to bottom left plug and = nothing? Pulled all plugs for inspection, (plugs were pretty new) had a lot of oil and grim on them so I bought new ones and installed. hoping that this would solve the mystery? Also checked to make sure all plugs were firing (they were). The coils on this motor were also new. Next step, hard starting still, once running same senario, would run but not at low idle, or in gear. Pulled plugs agin to inspect, top left had signs of combustion, all others just some un-burnt fuel mix on them. Did a generic compression check, thumb over plug hole while turining over to feel compression on all 4, Sorry for this being so long, I just wanted to get all the info to you, and not leave anything out - PLEASE HELP I'm at my whits end!!! Thanks BIGCAT33
