Boat won't start after sitting a few hours???
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Boat won't start after sitting a few hours???

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    Default Boat won't start after sitting a few hours??? w/resto pics

    Alright now that I have taken my boat out a few times the gremlins are coming out! This is my 78 Baja 18' with a 402 BBC and berkeley pump...... Here's what it's doing... take it out to the river and back it in on the ramp, turn the key n pump the throttle a few times and starts right up no problems at all. go drive around for awhile or take my brother tubing and it runs great.... shut it off for 5-10 minutes even a half hour and it'll start right back up..... pull up to the same sand bar we always park at and let it sit for a few hours... won't start at all. 1st time i went out with it, always fired up but it never sat for more than a half hour. 2nd time I went out let it sit for 2 hours....wouldn't start got a tow in and halfway back to the boat ramp it fired right up and i drove in no problems after that, even test started it on land a few times and it was fine. 3rd time I went out with the boat...drove for awhile, went and parked in the same spot, went to go home and fired right up and no problems at all that night.....tonight took it out n went tubing for awhile, parked it in the same spot....wouldn't start, crank and crank and crank but no fire....got towed in and didn't start at all even after pulling it out of the water..... then ate dinner after boating and cranked it with a half dead battery an hour after pulling it out of the river....what do u know fires right up and starts like a champ...... do you think the carb could use a rebuild (or replaced since I want a shiny new quick fuel carb n e how)??? I am going to pull the plugs and see what they look like tomorrow but if anyone has ran into this problem or you think you have an idea any input is welcome..... Oh and also since I never got an answer in my last post. at wot it turns about 4600 rpms and does only 46ish mph..... I had someone who knows more about jet boats feel the impeller and thinks its ok but the edges felt a little rounded and said with a good shape rebuilt pump should only turn about 4100 rpms and thinks mine could use a little rebuild??? does this sound right to you guys??? thanks in advance for the help..... I feel weird asking for help but jet boats are a new creature to me!
    Last edited by 84lsvette; 07-07-2012 at 06:13 PM.

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    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by 84lsvette View Post
    Alright now that I have taken my boat out a few times the gremlins are coming out! This is my 78 Baja 18' with a 402 BBC and berkeley pump...... Here's what it's doing... take it out to the river and back it in on the ramp, turn the key n pump the throttle a few times and starts right up no problems at all. go drive around for awhile or take my brother tubing and it runs great.... shut it off for 5-10 minutes even a half hour and it'll start right back up..... pull up to the same sand bar we always park at and let it sit for a few hours... won't start at all. 1st time i went out with it, always fired up but it never sat for more than a half hour. 2nd time I went out let it sit for 2 hours....wouldn't start got a tow in and halfway back to the boat ramp it fired right up and i drove in no problems after that, even test started it on land a few times and it was fine. 3rd time I went out with the boat...drove for awhile, went and parked in the same spot, went to go home and fired right up and no problems at all that night.....tonight took it out n went tubing for awhile, parked it in the same spot....wouldn't start, crank and crank and crank but no fire....got towed in and didn't start at all even after pulling it out of the water..... then ate dinner after boating and cranked it with a half dead battery an hour after pulling it out of the river....what do u know fires right up and starts like a champ...... do you think the carb could use a rebuild (or replaced since I want a shiny new quick fuel carb n e how)??? I am going to pull the plugs and see what they look like tomorrow but if anyone has ran into this problem or you think you have an idea any input is welcome..... Oh and also since I never got an answer in my last post. at wot it turns about 4600 rpms and does only 46ish mph..... I had someone who knows more about jet boats feel the impeller and thinks its ok but the edges felt a little rounded and said with a good shape rebuilt pump should only turn about 4100 rpms and thinks mine could use a little rebuild??? does this sound right to you guys??? thanks in advance for the help..... I feel weird asking for help but jet boats are a new creature to me!
    What ignition system does your boat have?

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    Senior Member rpm0414's Avatar
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    X2. It's an electrical/ ignition prob. Some kind of short or ground. Intermittent interruption of power to starter.

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    It has a regular distributor with an accel super stock coil. I will get some pictures of the setup tonight since I haven't had time to really dig into it yet and tonight I have a free night....the wiring needs to be cleaned up a bit which I plan on doing tomorrow..... I pulled a few plugs and the Spark plugs looked like they were very recently changed (they said the engine was just rebuilt so I'd hope they look new anyway). They weren't dark or wet or white they looked fine.

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    Quote Originally Posted by 84lsvette View Post
    Here's what it's doing... take it out to the river and back it in on the ramp, turn the key n pump the throttle a few times and starts right up no problems at all. go drive around for awhile or take my brother tubing and it runs great.... shut it off for 5-10 minutes even a half hour and it'll start right back up..... pull up to the same sand bar we always park at and let it sit for a few hours... won't start at all.!
    i had this problem for years...i had to pump the throttle to get it started---and had to hold the throttle wide open after sitting for long times...(never had to be towed, just pissed me off )

    mine was my Carb needed to be rebuilt...when i sat for long periods of time it would flood itself...

    i was running points when all this was happening to me...the carb rebuild fixed my hard starting problem.......for the most part.........a couple years later i replaced my pionts with Petronics....
    now if you look at the key for too long it starts.....

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    Quote Originally Posted by 84lsvette View Post
    It has a regular distributor with an accel super stock coil. I will get some pictures of the setup tonight since I haven't had time to really dig into it yet and tonight I have a free night....the wiring needs to be cleaned up a bit which I plan on doing tomorrow..... I pulled a few plugs and the Spark plugs looked like they were very recently changed (they said the engine was just rebuilt so I'd hope they look new anyway). They weren't dark or wet or white they looked fine.
    Rig up a light and tap into the power wire to the dist where it plugs into the terminal and go out and if it won't start and the light is on you know its in the dist.

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    Next time it does this, do 2 quick checks. First, look down into the carburetor and pump the throttle with your hand. Do you see gas shooting in from the accelerator pump? If it's not squirting strong I would look for a siphoning problem or some cracking in the fuel lines allowing the fuel system to suck air, basically running out of fuel.

    Second, if there's fuel squirting in the carb, then check for spark. You can either buy a spark checker to put in between the spark plug and plug wire, or old school it and stick a screw driver in the end of the spark plug wire and ground it to the block. Crank the engine over and see if you have spark.

    It should take all of 1 minute to make these two checks. Then you will at least have a direction to go to fix the problem.

    Your engine still needs the same 4 basic essentials to run as they did 100 years ago, fuel, compression, ignition and exhaust. We can safely assume you have exhaust and reasonable compression. So you're down to fuel and ignition. Don't just guess, but verify. Remember the KISS method and don't over think it.

    http://www.summitracing.com/parts/RNB-86579/

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    So I have been investigating it and pondering.....could this be the result of an overheated coil? which is why it starts every time I leave it sit at the house but not after I've been at the beach....which the only difference being.. my radio is playing while we are beached but not while its on land and the key is on while the boat is sitting when are boating with the radio on??? also the radio is wired into the ignition switch. I am thinking of installing a separate switch and wiring it straight to the battery? sound like a possibility?

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    I would start with checking the carb for flooding after you shut it off and let it sit for a while.

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    I don't feel tardy Hallett Dave's Avatar
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    Quote Originally Posted by 84lsvette View Post
    So I have been investigating it and pondering.....could this be the result of an overheated coil? which is why it starts every time I leave it sit at the house but not after I've been at the beach....which the only difference being.. my radio is playing while we are beached but not while its on land and the key is on while the boat is sitting when are boating with the radio on??? also the radio is wired into the ignition switch. I am thinking of installing a separate switch and wiring it straight to the battery? sound like a possibility?
    Very well could be a big part of the problem.
    I melted down a Pertronics set up a few years back because of the ignition key being left on.. Oh and the oil filled coil was destroyed as well.
    YES, rewire your radio.
    HD
    Last edited by Hallett Dave; 07-06-2012 at 09:43 AM.
    Quote Originally Posted by Futs View Post
    Im non induced and My turd leaves pretty hard as she sits.

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    Quote Originally Posted by ICECREAMAN View Post
    Next time it does this, do 2 quick checks. First, look down into the carburetor and pump the throttle with your hand. Do you see gas shooting in from the accelerator pump? If it's not squirting strong I would look for a siphoning problem or some cracking in the fuel lines allowing the fuel system to suck air, basically running out of fuel.

    Second, if there's fuel squirting in the carb, then check for spark. You can either buy a spark checker to put in between the spark plug and plug wire, or old school it and stick a screw driver in the end of the spark plug wire and ground it to the block. Crank the engine over and see if you have spark.

    It should take all of 1 minute to make these two checks. Then you will at least have a direction to go to fix the problem.

    Your engine still needs the same 4 basic essentials to run as they did 100 years ago, fuel, compression, ignition and exhaust. We can safely assume you have exhaust and reasonable compression. So you're down to fuel and ignition. Don't just guess, but verify. Remember the KISS method and don't over think it.

    http://www.summitracing.com/parts/RNB-86579/
    Follow Icecreaman instructions. You may also have a loose ground wire that you may find while cleaning up the wireing.

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    Quote Originally Posted by Hallett Dave View Post
    Very well could be a big part of the problem.
    I melted down a Pertronics set up a few years back because of the ignition key being left on.. Oh and the oil filled coil was destroyed as well.
    YES, rewire your radio.
    HD
    This will be my project for tonight....because I really do think that it is the problem. Then if it doesn't start next week I will test it while its malfunctioning.........it still needs a shiny carb to top it off either way. Anyone have any input on the jet drive being rebuilt? should it be turning lower rpms and go a little faster? its 4600 rpms with it trimmed down to where its moving faster and not shooting a rooster and 4800 when its trimmed up to shoot a rooster tail which I don't do that often because it doesn't go as fast.

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    S&S
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    In your first post, you said your turning 4600 rpm and only doing 46 mph in an 18' hull??? Something doesn't sound right, I would think you should be up over 50 mph anyway. My 18' Rogers turns 4900 rpm at 73 mph. I have a BBC and recently rebuilt Berkeley pump with an A impeller, no loader, shoe, or ride plate, just a Place Diverter.
    Last edited by S&S; 07-06-2012 at 11:16 AM.

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    unless the tach or my phone GPS is off then thats what i got. speedometer on the boat reads 42ish and my phone gps says 46-47 as well as my buddies gps. thats with 3 people in the boat, with just me it says 49 mph. Is it true I should be turning less rpm with a fresh built pump or is that just impeller design that would lower the rpm?

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