Results 1 to 4 of 4
  1. #1

    2004 GTX SC - Spark Plug melt?

    Fixed up a 2004 GTX SC and put new oil, spark plugs, antifreeze that had been sitting for 4 years and with the new battery it started up in a few minutes! Did a quick 30 min run one one day, sounded great, ran great. the next day filled up the tank, ran it for 2 hours and still ran smooth. I had stopped in the lake, made a slow turn then it went dead, a small metal bump sound then quit...wouldn't restart. Pulled the first 2 spark plugs and looked fine the third one..well it didn't look good...... Going to tear down the engine but any tips what may have caused this? Valves, bad piston? Looks like it got REAL hot and or the piston hit it.


    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	20200709_174941.jpg 
Views:	86 
Size:	41.3 KB 
ID:	464353   Click image for larger version. 

Name:	20200709_174813.jpg 
Views:	96 
Size:	24.5 KB 
ID:	464350   Click image for larger version. 

Name:	20200709_174947.jpg 
Views:	95 
Size:	27.6 KB 
ID:	464351   Click image for larger version. 

Name:	20200712_205027.jpg 
Views:	90 
Size:	50.2 KB 
ID:	464352  

  2. #2
    This is how I run a jetski shop in the desert nmpeter's Avatar
    Join Date
    May 2008
    Location
    Elephant Butte New Mexico
    Posts
    8,989
    +1
    2,186
    dropped a valve.

    sorry bout that.

    the valve stems in an underutilized engine can corrode, but typically its the later years one that snap at the valve head.

    that plug looks like it was hit by an edged weapon. a piston hit is more blunt and the damage looks different

    an inspection camera could reveal more without having to pull the head in case you don't want to have to do something that drastic before getting ready top replace it. you can pick them up cheap on amazon.


  3. #3
    Quote Originally Posted by nmpeter View Post
    dropped a valve.

    sorry bout that.

    the valve stems in an underutilized engine can corrode, but typically its the later years one that snap at the valve head.

    that plug looks like it was hit by an edged weapon. a piston hit is more blunt and the damage looks different

    an inspection camera could reveal more without having to pull the head in case you don't want to have to do something that drastic before getting ready top replace it. you can pick them up cheap on amazon.
    Thanks,
    It doesn't show in the pictures, but I can see some similar wear / damage when I look down inside the spark plug hole. It it is the valve, it it worth replacing all of them with standard seadoo valves or something like Supertech Light Weight Valve Set for Sea-Doo

    https://www.4-tecperformance.com/index.php?main_page=product_info&products_id=2114



  4. #4
    This is how I run a jetski shop in the desert nmpeter's Avatar
    Join Date
    May 2008
    Location
    Elephant Butte New Mexico
    Posts
    8,989
    +1
    2,186
    you're getting a bit ahead of yourself, the engine might need a block and cylinderhead depending on the level of damage. if you can see damage on thge piston, the head might be unsalvageable.

    go ahead and pull the head and we'll go from there.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 2004 Genesis i Spark Plug Fouling
    By JJL1968 in forum Polaris How To & FAQs
    Replies: 11
    Last Post: 08-19-2018, 08:04 PM
  2. 97 GTX spark plug read help
    By wjholt in forum 2-Stroke Performance
    Replies: 1
    Last Post: 07-03-2014, 12:28 PM
  3. 2004 XLT1200 Melted spark plug anode
    By Steveard in forum Yamaha PWC Performance (2-stroke)
    Replies: 0
    Last Post: 08-10-2011, 02:14 PM
  4. Spark Plug Gap on 03 GTX
    By super_gtx in forum 4-Tec Performance
    Replies: 2
    Last Post: 08-08-2008, 12:12 PM
  5. 2004 Seadoo (Oddysey battery and spark plug ?)
    By seadawg in forum 4-Tec Performance
    Replies: 1
    Last Post: 07-11-2006, 10:54 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
  •