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Starboard Engine 5.0 carb(39)d having problems starting-gctid371001

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  • Starboard Engine 5.0 carb(39)d having problems starting-gctid371001

    Hi Folks,

    I'm having some trouble keeping my starboard engine running when first firing it up. I've had the boat for about 2.5 months and this has just recently become a problem. The first time it happened was when putting it back in the water after having it hauled and re-painted, which I have to think is a coincidence.

    Before I start the engine I move the throttle, in neurtral all the way forward a few times, then back off to the 'engaged' position before turning the key. Generally the engine fires up after just a few cranks on the starter, runs for anywhere between 10-30 seconds, slightly increases in RPM and then dies and there is an audible 'whoosh' noise. First time this happened it took me 10 minutes to get the boat started, the next warm day it fired up with no hassle. It's now happened to me in warm and cold weather...It seems to be taking longer if anything to start the boat now. It doesn't seem to matter if I run it a higher RPM, nor if I try and vary the RPM after it starts. Yesterday it took me a solid 20 minutes to get the engine to stay running. Once it's running, it's solid and not a problem. Nor will it be a problem if I turn the engine off for a few hours to grab a bite to eat before heading home.

    So any ideas? Anyone know a decent mechanic that would come out to the boat at Shilshole in Seattle?


  • #2
    My first look would be at the choke. Is it open when its cold?( it should be closed) is it closed after about 5min. of running( it should be open). If not working properly adjust accordingly.

    That's a starting point.
    1989 Avanti 3450 Sunbridge
    twin 454's
    MV Mar-Y-Sol
    1979 Bayliner Conquest 3150 hardtop ocean express.
    Twin chevy 350's inboard
    Ben- Jamin
    spokane Washington