SBT Jetski Engines, Parts & Accessories

Page 1 of 3 123 LastLast
Results 1 to 10 of 21
  1. #1
    Joined
    Aug 2005
    From
    Lakeland, FL
    Posts
    8

    Unhappy GP1200R took on water from failing to replace drain plugs

    Hello everyone,
    I have a GP1200R with about 14 hours on it. Today we took it out on the lake for about 3 hours. I normally remove the boat from the trailer, however, a freind removed the boat and failed to check the drain plugs. The Ski ran great for about 2 hours. Then my cousin indicated that the Ski turned off a couple of times. Therefore we towed the ski in and proceeded home. After we travelled about 10 miles I decided to check the drain plugs and sure enough they were left off. We removed the seat and the engine compartment had water. I am sure it had more water as we had been driving for awhile. We took the ski home and removed the spark plugs. The number 2 cylinder had fluid in it. We sprayed WD40 in all of the cylinders many times. Then we turned the engine over to remove any excess water. I did not remove the breather as I do not know how to get the clips off and do not know if I need to do so. We replaced the spark plugs and turned the engine over a couple of times and it started. It ran rough and smoke some from the rear. We removed the spark plugs and sprayed more WD40 down in the cylinders. We replaced the spark plugs and cranked it again. Still not running great, however, it was running. Took the ski to the lake and it seemed to run fine for about 3 or 4 minutes and then it would die. Try to crank and it would crank up and run for a minute or so. Removed the spark plugs and the front 2 cylinders are firing, however, the rear cylinder does not seem to be firing and also the top of the spark plug was grey instead of brown/black. Took the ski home and sprayed more WD40 in the engine. What do you think the problem will likely be?

  2. #2
    Joined
    Apr 2004
    From
    HUMBLE /ATASCOCITA TX
    Posts
    762

    Default Re: GP1200R took on water from failing to replace drain plugs

    A grey plug is aluminum residu. Bad news. Do a compression check. You most likely have internal damage. Grey is never good.
    WATERCRAFT SERVICES. PROVIDING THE RESIDENTS OF HOUSTON AND SURROUNDING AREAS WITH QUALITY WORK ON THEIR PWC AT A FAIR PRICE.

  3. #3
    Joined
    Jul 2004
    From
    Indiana
    Posts
    87

    Default Re: GP1200R took on water from failing to replace drain plugs

    Sounds like you still could have water in the 3rd cylinder. When you mix water with oil is tends to look like a milky grey. The plug will be really wet if this is the case and is probably fouled. If the plugs are dry and grey, your problems probably go deeper. I would make sure the cases are 100% free of the water, do a compression test and if everything looks fine toss in some new plugs and get it running asap. To clear your boat of water roll it onto it's exhaust side 90*, ground all the plugs, and get a rag or towel to keep the crapy water from spraying you, your dog and your boat. Push the starter and hold the rag as tight as you can over the plug holes and see if it's still getting wet. Also, be careful not to start a fire:-)
    Good luck.

  4. #4
    Joined
    May 2003
    From
    Houston, TX
    Posts
    372

    Default Re: GP1200R took on water from failing to replace drain plugs

    You need to follow Antwon's advice and the instructions in this video:
    http://server1.sbtontheweb.com/forum...ad.php?t=12031

    Do not delay. You have a very small window of opportunity to save your motor. Do it ASAP!
    "Helping you make smart choices about your money - so you can live a better life."

  5. #5
    Joined
    Aug 2005
    From
    Lakeland, FL
    Posts
    8

    Default Re: GP1200R took on water from failing to replace drain plugs

    Hello,

    The grey was on the 3rd cylinder. Performed a compression check and the front two cylinders had ~105psi. Checked the rear cylinder and it had 0psi. You can actually hold your finger over the plug while turning the engine over. My friend suggested it might be a blown valve as the engine sounds good and there appears to be no hole in the piston. Comments?

  6. #6
    Joined
    Jul 2005
    From
    Plainfield, IL
    Posts
    30

    Default Re: GP1200R took on water from failing to replace drain plugs

    Quote Originally Posted by ntelligent
    Hello,

    The grey was on the 3rd cylinder. Performed a compression check and the front two cylinders had ~105psi. Checked the rear cylinder and it had 0psi. You can actually hold your finger over the plug while turning the engine over. My friend suggested it might be a blown valve as the engine sounds good and there appears to be no hole in the piston. Comments?
    What kind of valve? The GP1200R is a 2 stroke meaning it has no valves besides the Powervalve on the exhaust and the Reed Cages on the intake. Which either of them most likely would not be affected by water at all.

  7. #7
    Joined
    Apr 2004
    From
    HUMBLE /ATASCOCITA TX
    Posts
    762

    Default Re: GP1200R took on water from failing to replace drain plugs

    Like I said. (Grey is never good.) It would run 3-4 minutes and then start missing. Thats when the aluminum and metal chunks are contaminating the new plug. He said he ran it for 3-4 minutes on the first post. Thats enough time to clear the water out. A compression test should have been done immediatly after water removal and before any attempts to start the engine. That may have decreased the damage that it now has for sure after being run again. Now the contamination has most likely spread throughout the bearings. Tear it down and inspect.
    WATERCRAFT SERVICES. PROVIDING THE RESIDENTS OF HOUSTON AND SURROUNDING AREAS WITH QUALITY WORK ON THEIR PWC AT A FAIR PRICE.

  8. #8
    Joined
    May 2004
    From
    clearwater
    Posts
    76

    Default Re: GP1200R took on water from failing to replace drain plugs

    how true, instead of a piston, now it may need the bottom end as well. if you don't have a reliable shop let me know, I may be able to help.
    Last edited by tom21; 08-10-2005 at 01:15 AM. Reason: not finished

  9. #9
    Joined
    Apr 2004
    From
    HUMBLE /ATASCOCITA TX
    Posts
    762

    Default Re: GP1200R took on water from failing to replace drain plugs

    Very possible.
    WATERCRAFT SERVICES. PROVIDING THE RESIDENTS OF HOUSTON AND SURROUNDING AREAS WITH QUALITY WORK ON THEIR PWC AT A FAIR PRICE.

  10. #10
    Joined
    Jul 2004
    From
    Indiana
    Posts
    87

    Default Re: GP1200R took on water from failing to replace drain plugs

    Quote Originally Posted by tom21
    how true, instead of a piston, now it may need the bottom end as well. if you don't have a reliable shop let me know, I may be able to help.
    Easy boys, he tried to do the right thing by getting the water out. I just went to check the SBT video to see what procedure they suggest (see Uncle-bucks post)
    I think it's a pretty good procedure and I've used it many times. Did he have metal on his plug before he started it the first time? If he did see it right off the bat, he still went ahead with what he thought was the right thing to do by getting the water out and running the boat at the lake. If he didn't notice it until nothing else was working for him, he still MIGHT have saved his crank by getting the moisture out. If he had done a compression test right after the swamping ( after draining the motor) before trying to get it running and tore the engine down to dry it by hand and oil everything back up, that would have been ideal. But he didn't. He tried to do what he thought was the correct procedure before he posted his problems.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Preseason check list!!
    By jcar25 in forum Sea-Doo
    Replies: 4
    Last Post: 08-22-2021, 05:49 PM
  2. Diagnose 951 Failure
    By dean thompson in forum Sea-Doo
    Replies: 9
    Last Post: 11-12-2003, 12:40 AM
  3. GP1200R Problems in very rough water
    By Bryan Glynn in forum Yamaha
    Replies: 29
    Last Post: 10-02-2002, 02:54 PM
  4. Help!!! wierd substance coming from drain plugs
    By skiinginTO in forum Sea-Doo
    Replies: 2
    Last Post: 04-25-2002, 06:42 PM
  5. HELp !!!! water in cylinders - confused
    By Airborne in forum Yamaha
    Replies: 11
    Last Post: 01-29-2002, 10:16 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •