SBT Jetski Engines, Parts & Accessories

Results 1 to 7 of 7
  1. #1
    Joined
    Jun 2009
    From
    jackson, ms
    Posts
    5

    Default WEIRD spark plug scenerio !?!?!?!?! Help!!!!

    I recently picked up a couple Honda's, a 2005 r12x
    and a 2007 f12x. They both started pretty easily when I first bought
    them. They progressively were harder and harder to start, so I got new
    plugs. They started up perfectly with new plugs, but then progressively
    started to get harder and harder to start, like the plugs were fouling
    out. By accident, I found out that if I raised the ignition coils up
    about 1 inch, the cylinders will fire off perfectly and smoothly. I've
    even got to the point now that I remove the hold down screw, pull up the
    coil, barely screw in the hold down screw, and then let the coil rest
    about 1 inch above being flush and the ski runs perfect. What's even
    more odd, after warming the engine up, I can drop the coils back down
    and the ski runs fine. Any idea what's up with this kind of weirdness
    ???? I'm truly baffled !

    thanks,
    jetskijay

  2. #2
    Joined
    Mar 2010
    From
    Tn
    Posts
    16

    Default Re: WEIRD spark plug scenerio !?!?!?!?! Help!!!!

    Jay
    Make sure there is no corrosion on the coils Then I would try and add some dielectric grease to the bottom of the coils where they come in to contact with he plugs it almost sounds like your coils are breaking down internally . I recently had a similar problem on a 2008 yamaha vx110 i had 2 replace 3 of my coils and this solved my problem . I would also check all ground connections between the battery and engine block. James
    ** Is your engine core wasted send me a pm I may have the core you need to send to SBT **

  3. #3
    Joined
    Sep 2010
    Posts
    8

    Default WEIRD spark plug scenerio Help

    k guys well we replace the stator plate on the engine and we are getting a spark but a very weak one and only when the plug is held to the engine it wont spark in cylinder
    Some trusted resellers have affordable hovercraft for sale offers in the US.

  4. #4
    Joined
    Mar 2003
    From
    SBT
    Posts
    21,555

    Default Re: WEIRD spark plug scenerio Help

    Check all grounds, clean all areas that your ground wires attach to.
    SBT Tech Support is here to help with your problems.
    We try to answer each question quickly and accurately.
    Please do not use Private Messaging for Tech Support, use the forums.

  5. #5
    Joined
    Sep 2012
    Posts
    1

    Default Re: WEIRD spark plug scenerio Help

    k guys well we replace the stator plate on the engine and we are getting a spark but a very weak one and only when the plug is held to the engine it wont spark in cylinder

  6. #6
    Joined
    Mar 2003
    From
    SBT
    Posts
    21,555

    Default Re: WEIRD spark plug scenerio Help

    still sounds like bad connections, ground or stick coil or connection to the stick coil. try one of the other coils.
    SBT Tech Support is here to help with your problems.
    We try to answer each question quickly and accurately.
    Please do not use Private Messaging for Tech Support, use the forums.

  7. #7
    Joined
    Nov 2010
    From
    New Bern, North Carolina
    Posts
    3

    Default Re: WEIRD spark plug scenerio !?!?!?!?! Help!!!!

    JetskiJay
    Both are a common problem with bad ground wires on the block. Also there are mount inside the magneto housing what is called signal generator that counts flywheel signals and sent that information to each of your ECU for firing order. If the signal get weak then weak spark and fouling the plugs. Also the common problem with ECU 40 pin connection on the ECU getting wet. Honda's also like better high grade of fuel then the cheap stuff. Each Honda is differnet, but if it goes bad the engine will not start. Good Luck. Frank JETSKIDOC LLC

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 2001 Yamaha XL800 Spark plug wire burnback
    By Glenn Radalinsky in forum Yamaha
    Replies: 1
    Last Post: 07-24-2009, 11:09 AM
  2. Replies: 14
    Last Post: 08-16-2006, 08:10 PM
  3. Spark Plug Heat Range
    By benq in forum Polaris
    Replies: 2
    Last Post: 07-25-2005, 07:43 PM
  4. Spark Plug Boots Not Staying Seated
    By SeaLion in forum Polaris
    Replies: 5
    Last Post: 06-05-2003, 12:14 AM
  5. How do I change the spark plug wires??????
    By 97GSX in forum Sea-Doo
    Replies: 1
    Last Post: 05-25-2002, 09:36 PM

Posting Permissions

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