Recent content by peakay

  1. peakay

    Help Diagnosing carb vs ignition problem, 5.7 mercruiser

    Just to follow up, did a weekend island trip about 60 miles round trip and all was fine. Didn't do anything crazy - just planed out and then backed the engines to 3k rpms and ran between 18-21 knots dragging a dinghy. no problems.
  2. peakay

    Help Diagnosing carb vs ignition problem, 5.7 mercruiser

    So I had the guy put the original fuel pump back in against his advice, sea trialed the boat, no problems. All is good now. Sole problem was the anti-siphon valve. I will keep this mechanic for basic maintenance and find someone better for troubleshooting. Would have used someone else this...
  3. peakay

    Help Diagnosing carb vs ignition problem, 5.7 mercruiser

    after a long day of trouble shooting, checking spark, taking the fuel filters off and seeing a lower than expected level, tracing the fuel lines all the way back, removing and cleaning all connections, he found....a problem with the anti-siphon valve at the exit of the fuel tank, I don't know...
  4. peakay

    Help Diagnosing carb vs ignition problem, 5.7 mercruiser

    As I recall still closed a bit. On the linkage, yes I set it with the linkage disconnected. I had never done it before and didn’t set it to apply pressure, but I’m confident it’s not a linkage issue.
  5. peakay

    Help Diagnosing carb vs ignition problem, 5.7 mercruiser

    Pss - here is a stupidly long video of the problem recorded and posted to YouTube. The boat doesn’t seem to die as fast with the carb rebuilt, further leading me to believe it’s fuel related, but who knows?
  6. peakay

    Help Diagnosing carb vs ignition problem, 5.7 mercruiser

    Ok, so I swapped out the coil for a new one and tested again. Engine started so fast it scared the crap out of me! However, 30 minutes later the problem came back. Thank you. Our mechanic came out today and suspects it’s a fuel pump issue. He is going to return Monday and test the flow plus...
  7. peakay

    5.7L Mercruiser Timing Advance Failure after 20 min of running

    This sounds like a problem I'm chasing @snsrider717 . Can you let us knwo the eventual cure? Thank you.
  8. peakay

    Help Diagnosing carb vs ignition problem, 5.7 mercruiser

    OK boys, thanks for all the help and advice. Had the carb rebuilt, started the motor, ran great .... but started crapping out after 20 minutes or so just like it did before.. Seems like its some sort of ignition issue to me at this point where something is getting hot and failing. I then...
  9. peakay

    Help Diagnosing carb vs ignition problem, 5.7 mercruiser

    Or Both!
  10. peakay

    Help Diagnosing carb vs ignition problem, 5.7 mercruiser

    Thanks All. I ended up pulling the carb today and was going to swap them, but decided not to mess with the working engine. Will have it back on this weekend and see if that causes the problem. I'll be sure to report back -- I read so many threads with similar problems and then nobody closes...
  11. peakay

    Help Diagnosing carb vs ignition problem, 5.7 mercruiser

    Well, I had people aboard for a Sunday cocktail cruise yesterday. before leaving I inspected the ignition module for any melting (all good), disconnected the plug and cleaned with contact cleaner, plus swapped coil wires between engines. this was all i could do in my limited time before people...
  12. peakay

    Help Diagnosing carb vs ignition problem, 5.7 mercruiser

    Thanks guys. Seems like it could be the carb, but with having had that coil problem a while back and the fact that is seems to do it after a period of time/possibly from heat, I just started coming back to the coil or possibly an ignition module. One possibly important bit of info I left out...
  13. peakay

    Help Diagnosing carb vs ignition problem, 5.7 mercruiser

    Hi there, We bought a 1990 Tiara 2700 with the original 5.7 twin Mercruisers last year, which now has 1200 hours. Our STBD engine has developed a problem where once it runs for 20-30 minutes idling through the harbor it starts bucking at idle rpm in the marina and then stalls. Engine starts...
  14. peakay

    Avoid purchasing boat due to DP290 in Saltwater??

    Hi there, We were looking at a new to us boat, a 1988 Cobalt 21 BR with a AQ 271c engine which is backed by the Volvo DP 290 outdrive (its white with duo prop), 327 hours on the drivetrain. Its been a lake/trailer boat until the last 2 years when the current owners got it, restored it, did...
  15. peakay

    Project: Convert Top Storage to Ice Chest??

    Hey there, We have an old 1987 Chris Craft Scorpion 210 Bowrider and it has a flip up compartment for storing the old convertible top that we no longer use and I got the idea it make a neat cooler if it could be sealed up. Would be cool at the dock or anchored to have beer and wine in there...
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