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  1. #1
    Join Date
    Jun 2018
    Posts
    12

    Default Help! Moomba will not stay running

    Good afternoon everyone,

    I recently purchased a 2011 Moomba XLV with a 325 Indmar assult. We test drove before buying and it ran great. 2 weeks later picked it up and went straight to the lake with the family. Stared up ran fine the first time but i only ran it for a minute or 2 and stopped to pick up a few more people. (8 total on the boat) Sat for 15 minutes or so and boat didn't want to start. Got it going and took off ran for maybe 10 minutes at 3/4 throttle and boat suddenly shut off. Checked kill cord all that was good. We sat for 15 to 20 mintues started rough but got going again and it suddenly died again. Took doing that 3 times before I made it back to the ramp.

    Took it to Indmar mechanic that Monday. They looked at it said that they drove it several times and had no issues. I put it back in this Saturday and had the same issues. Boat starts great but will not resart after the first run. Ended up having to be towed back this time. This is a 2011 so the fuel pump and filter are located in the tank, and it's EFI so I find it hard to believe that it is vapor lock. I also ran the blower the entire trip, went as far as leaving the engine compartment open. It was 80-85 degrees on the water. Oil pressure good engine temp runs at 150, 90 octaine non ethanol from a very reliable station , no smoke what so ever, it just won't restart after running. The indmar mechanic said he ran it for 45 minutes with no problems. Any ideas? When it runs it runs great just won't restart after initial run.

  2. #2
    Join Date
    Aug 2011
    Location
    Commerce Lake, MI
    Posts
    1,851

    Default Help! Moomba will not stay running

    Quote Originally Posted by mstopher82 View Post
    Good afternoon everyone,

    I recently purchased a 2011 Moomba XLV with a 325 Indmar assult. We test drove before buying and it ran great. 2 weeks later picked it up and went straight to the lake with the family. Stared up ran fine the first time but i only ran it for a minute or 2 and stopped to pick up a few more people. (8 total on the boat) Sat for 15 minutes or so and boat didn't want to start. Got it going and took off ran for maybe 10 minutes at 3/4 throttle and boat suddenly shut off. Checked kill cord all that was good. We sat for 15 to 20 mintues started rough but got going again and it suddenly died again. Took doing that 3 times before I made it back to the ramp.

    Took it to Indmar mechanic that Monday. They looked at it said that they drove it several times and had no issues. I put it back in this Saturday and had the same issues. Boat starts great but will not resart after the first run. Ended up having to be towed back this time. This is a 2011 so the fuel pump and filter are located in the tank, and it's EFI so I find it hard to believe that it is vapor lock. I also ran the blower the entire trip, went as far as leaving the engine compartment open. It was 80-85 degrees on the water. Oil pressure good engine temp runs at 150, 90 octaine non ethanol from a very reliable station , no smoke what so ever, it just won't restart after running. The indmar mechanic said he ran it for 45 minutes with no problems. Any ideas? When it runs it runs great just won't restart after initial run.
    Sounds like vapor lock to me. Next time it happens wrap the pump near the engine with a cold wet towel and see if that speeds up the restart. Also next time you take it out (hopefully in the morning before it gets too hot) try running it from dead cold for about 5-10 minutes, stop it and see if it restarts straight away. That should not be enough time to heat soak the engine bay. If it does restart, but then doesn’t after it gets all nice and hot, then this may add more credence to it being vapor lock.

    Also could have some old bad gas left in it. Dump in a can of Seafoam and let that work through the system to see if it helps.

    Another thing you can do other than dump cold water on the fuel pump when it does this is to relieve the pressure in the fuel rail but depressing the Schraeder valve to let the vaporized gas out.


    Sent from my iPad using Tapatalk
    Last edited by Stazi; 06-11-2018 at 02:55 PM.
    2017 Moomba Craz

  3. #3
    Join Date
    Jun 2018
    Posts
    12

    Default

    Quote Originally Posted by Stazi View Post
    Sounds like vapor lock to me. Next time it happens wrap the pump near the engine with a cold wet towel and see if that speeds up the restart. Also next time you take it out (hopefully in the morning before it gets too hot) try running it from dead cold for about 5-10 minutes, stop it and see if it restarts straight away. That should not be enough time to heat soak the engine bay. If it does restart, but then doesn’t after it gets all nice and hot, then this may add more credence to it being vapor lock.

    Also could have some old bad gas left in it. Dump in a can of Seafoam and let that work through the system to see if it helps.

    Another thing you can do other than dump cold water on the fuel pump when it does this is to relieve the pressure in the fuel rail but depressing the Schraeder valve to let the vaporized gas out.


    Sent from my iPad using Tapatalk
    Yesterday early afternoon I started it in the water, covered boat slip overcast maybe 80 out. Started right up. Let it idle a minute or so, put trans in nutral reved a few times and let go back to idle. Engine didn't even get to temp blower running and it would not start up a second time.

  4. #4
    Join Date
    May 2018
    Posts
    7

    Default

    You need to make sure you have fire. A bad coil can work intermittently when they get warm.

  5. #5
    Join Date
    May 2010
    Location
    Salt Lake City, Utah
    Posts
    1,050

    Default

    Quote Originally Posted by mstopher82 View Post
    Yesterday early afternoon I started it in the water, covered boat slip overcast maybe 80 out. Started right up. Let it idle a minute or so, put trans in nutral reved a few times and let go back to idle. Engine didn't even get to temp blower running and it would not start up a second time.
    I initially thought it was vapor lock as well but that doesn't sound like it.
    Scott
    2007 Mobius LSV with a lot of great upgrades and mods

  6. #6
    Join Date
    May 2013
    Location
    Fairfax, VA :(
    Posts
    916

    Default

    Could be the ECU. They don't like to start when it gets hot.
    2007 XLV Gravity Games
    Full Wake Makers upgraded ballast and pumps
    1,100 in each rear locker
    1,180 in front
    OJ 1435 prop, 325 EFI Indmar Assult.
    Fresh Air Exhaust
    SuckG8
    Bunch of other crap

  7. #7
    Join Date
    May 2015
    Location
    In the land of far far away.
    Posts
    30

    Default

    Sounds like you have a restriction in your fuel line. You get fuel for awhile and then it runs out. I would check your fuel filter first of all.

  8. #8
    Join Date
    May 2018
    Posts
    7

    Default

    Keep us updated on what you find out. Very interested to know.

  9. #9
    Join Date
    Jan 2006
    Location
    Jacksonville, FL
    Posts
    599

    Default

    Quote Originally Posted by Smoothwater View Post
    You need to make sure you have fire. A bad coil can work intermittently when they get warm.
    This is probably the culprit. I had the same issue on my Supra with the 325. Would run fine and the get rough and shut off. Let it sit and cool and would crank and run again for a bit. Took to dealer multiple times and they kept changing parts with no luck. I started doing my own research and came to the coil pack. When it would get hot it would get weak and boat would idle rough and die. I replaced it and problem was gone.

  10. #10
    Join Date
    Jun 2018
    Posts
    12

    Default

    Quote Originally Posted by 98outback View Post
    This is probably the culprit. I had the same issue on my Supra with the 325. Would run fine and the get rough and shut off. Let it sit and cool and would crank and run again for a bit. Took to dealer multiple times and they kept changing parts with no luck. I started doing my own research and came to the coil pack. When it would get hot it would get weak and boat would idle rough and die. I replaced it and problem was gone.
    Thanks for the suggestion. Do you remember what part number it was or where you ordered it?
    2011 Moomba XLV 325 Indmar Assault

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