Page 1 of 2 1 2 LastLast
Results 1 to 10 of 18
  1. #1
    VdeKock's Avatar
    Join Date
    Nov 2012
    Location
    Netherlands
    Posts
    566
    +1
    37

    GP1300 Another middle piston seized

    the middle piston seized last week from a GP1300r with only 75hours on it.
    Still looking for a cause...
    Stock ski with oil injection, all lines were in place. used Yamalube 2W (no more cat)
    piston wash looks good by me, only the middle spark plug looked a little more gray.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	IMG_7473.jpg 
Views:	132 
Size:	61.7 KB 
ID:	337685   Click image for larger version. 

Name:	IMG_7474.jpg 
Views:	127 
Size:	67.3 KB 
ID:	337686   Click image for larger version. 

Name:	IMG_7475.jpg 
Views:	103 
Size:	65.1 KB 
ID:	337687   Click image for larger version. 

Name:	IMG_7476.jpg 
Views:	119 
Size:	52.8 KB 
ID:	337688  


  2. #2
    VdeKock's Avatar
    Join Date
    Nov 2012
    Location
    Netherlands
    Posts
    566
    +1
    37
    more pics
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	IMG_7477.jpg 
Views:	99 
Size:	60.2 KB 
ID:	337689   Click image for larger version. 

Name:	IMG_7478.jpg 
Views:	123 
Size:	106.0 KB 
ID:	337690   Click image for larger version. 

Name:	IMG_7479.jpg 
Views:	111 
Size:	74.4 KB 
ID:	337691   Click image for larger version. 

Name:	IMG_7480.jpg 
Views:	94 
Size:	48.4 KB 
ID:	337692   Click image for larger version. 

Name:	IMG_7481.jpg 
Views:	96 
Size:	52.0 KB 
ID:	337693  

  3. #3

    Join Date
    Mar 2011
    Location
    Temecula, ca
    Posts
    68
    +1
    3
    Looks like the ring spun around and ended up in exhaust port.
    My 07 GPR has done this twice now. Read my thread "Another Spun Ring".
    When you get the damaged piston out, closely inspect the ring location pin on top ring and I'm willing to bet it is loose and recessed up into the ring land.

    Ceril

  4. #4
    VdeKock's Avatar
    Join Date
    Nov 2012
    Location
    Netherlands
    Posts
    566
    +1
    37
    Sure looks like it, the top ring is completely gone.... So bad luck i guess...

  5. #5

    Join Date
    Mar 2011
    Location
    Temecula, ca
    Posts
    68
    +1
    3
    Its not bad luck, its bad design/engineering of the ring locating pin on oem piston.
    I had one piston fail at 88 hours and the second one fail at 132 hours.

    When I inspected the pin on the piston, I replaced last time this happened, the pin is starting to come loose.
    This piston has 44 hours on it (132-8 and even though the pin is loose the ring has not spun yet since the ring end gap design will keep the pin captive.
    It is just a matter of time/hours and this pin will work its way up into the ring groove and the ring will spin under it and then into the exhaust port.

    Picture attached show how the pin has worked its way up into ring groove. Both my failed pistons had exact same failure mode.
    Curious if your piston has same problem with pin?

    Some solutions suggested on this forum are:
    1. Welded pins. I have no knowledge or experience with this process.
    2. Pro-X pistons. I have no experience with these.

    I am pursuing my own solution with machine shop guy at work to install larger pins and adjust ring end gap for the pin accordingly.
    I will be starting this project Aug18.

    PS: your location shows USA-NL. NL?, Nederland?

    Later, Ceril


    Click image for larger version. 

Name:	P1010283.jpg 
Views:	68 
Size:	108.6 KB 
ID:	337943

  6. #6
    VdeKock's Avatar
    Join Date
    Nov 2012
    Location
    Netherlands
    Posts
    566
    +1
    37
    I havent closely checked the pistons yet, its not my ski.
    But he is going to replace all 3 with pro-x

    my ski failed @60hours and did a complete rebuild also with prox and a new crank.


    And yes, i live in Nederland
    (im dutch, and use a mailbox in Portland,Oregon to ship all my goodies all at once

  7. #7

    Join Date
    Mar 2011
    Location
    Temecula, ca
    Posts
    68
    +1
    3
    How many hours on your ski since prox pistons installed?
    Just trying to get data on how reliable prox is vs oem.

    My parents with us six kids immigrated from holland to Idaho-USA in 1968 when I was 8 years old.
    We had a dairy farm in Oosterhout with house name "Welkom" and it is still there.
    Our family last name is "Wanders" and on my mom's side is "Kampschoer".

    Later, Ceril

  8. #8
    VdeKock's Avatar
    Join Date
    Nov 2012
    Location
    Netherlands
    Posts
    566
    +1
    37
    i have 20hours since rebuild.... a lot of guys use Pro-x, and WFO swears by OEM pistons

    Oke cool, i live aprox 20miles from Oosterhout (Breda).
    Wanders is a familiar name in barge shipping and constructions close by...

  9. #9

    Join Date
    Aug 2006
    Location
    Indiana
    Posts
    1,274
    +1
    81
    You need to look at this carefully and think it thru before blaming the ring pin: What caused the top of that piston to be grey and the sides all around the exhaust side to have molten aluminum around them? Looks like a lean seizure to me, and the melting of the piston allowed the ring to ride up and then catch the exhaust port. My opinion only.

    Knock on wood, but several boats in my family, with thousands of hours total, and no failures of the piston/ring pin in any of them. Not to mention of the thousands of Yamaha's built in the last 30 years it has not been a common issue. Hardly think its a design problem.

  10. #10
    VdeKock's Avatar
    Join Date
    Nov 2012
    Location
    Netherlands
    Posts
    566
    +1
    37
    Oke....
    Lean on fuel or oil?
    it only has an d-plate and no fuel controller...

Page 1 of 2 1 2 LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. GP1300r middle piston seized...
    By VdeKock in forum Yamaha PWC Performance (2-stroke)
    Replies: 24
    Last Post: 09-29-2013, 11:08 AM
  2. 1200 Middle Piston Seized!
    By yamman in forum Yamaha PWC Performance (2-stroke)
    Replies: 10
    Last Post: 05-11-2009, 09:44 PM
  3. XL1200 Piston Seized
    By NoGo1200 in forum Yamaha Old School Skis
    Replies: 19
    Last Post: 09-07-2008, 08:32 PM
  4. Help! GPR middle piston with hole. need advice.
    By jimshearer in forum Yamaha Open Discussion
    Replies: 16
    Last Post: 06-16-2008, 01:52 PM
  5. ANOTHER burnt piston, HELP!
    By workaholic in forum Polaris Open Discussion
    Replies: 45
    Last Post: 08-21-2007, 10:51 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
  •