Page 1 of 2 1 2 LastLast
Results 1 to 10 of 15
  1. #1
    wakewhornc's Avatar
    Join Date
    Jul 2008
    Location
    Wilmington NC
    Posts
    339

    would overheating cause reeds to go bad?

    i decided to start a new thread because my other thread wasnt getting any responses. im still having problems with my 04 1300. my question is when my engine overheated could that have caused the reed valves to warp out of spec? it still has a pop (backfire) when crusing and a surge between 5000-6000rpms (rpms raise and drop ~500rpm). also if it has been sitting for a day or so its hard to start and smokes alot (no smoke once warm), also it has backfired and shut off a couple time when trying to start when its cold, it idles really rough too. once it gets to operating temp it starts fine everytime. ive been chasing the problem for over a month now and its getting annoying. i got a gps this week and when i ran it yesterday with a full tank of gas, ~2mph current and a 10-15mph headwind the best i saw was 61.7mph. the conditions were less then perfect but i was hoping for a little better then that.


  2. #2
    if it heated enough to distort reeds I would think the crank seals would have melted , Not likely IMHO

  3. #3
    wakewhornc's Avatar
    Join Date
    Jul 2008
    Location
    Wilmington NC
    Posts
    339
    thats the words i was hoping to hear, thanks.

  4. #4

    Join Date
    Apr 2006
    Location
    panama city beach 'fl
    Posts
    1,846
    +1
    9

    Cool

    do you still have cat in it?

    later cd

  5. #5
    TRIPLE PIPES ARE 2-STROKE TURBOS allcool's Avatar
    Join Date
    Nov 2005
    Location
    s fl
    Posts
    414
    Quote Originally Posted by wakewhornc View Post
    also it has backfired and shut off a couple time
    Well, diffidently backfire breaks reeds...
    a sure sign of leaking reeds is fuel/ back wash in your flame arrestor.

    Why did it overheat in the first place ?

    My advice is to carefully check compression with valves open and closed... and check your reeds, in that order. Depending what you find will determine what to do next.

    allcool

  6. #6
    wakewhornc's Avatar
    Join Date
    Jul 2008
    Location
    Wilmington NC
    Posts
    339
    Quote Originally Posted by allcool View Post
    Well, diffidently backfire breaks reeds...
    a sure sign of leaking reeds is fuel/ back wash in your flame arrestor.

    Why did it overheat in the first place ?

    My advice is to carefully check compression with valves open and closed... and check your reeds, in that order. Depending what you find will determine what to do next.

    allcool

    it overheated because the raw water hose coming from the transom came off, and it was rode a full throttle till it quit (i wasnt on it). a new head and gasket later it runs with good compression (~125psi across the board)
    maybe i should take the stringer back off and take the air box off to check things out?

  7. #7
    That is the best bet ! Pull it down ( even though those are a pain )
    keep us posted Z EDIT ps why did it need a new head gasket?

  8. #8
    TRIPLE PIPES ARE 2-STROKE TURBOS allcool's Avatar
    Join Date
    Nov 2005
    Location
    s fl
    Posts
    414
    Quote Originally Posted by wakewhornc View Post
    it overheated because the raw water hose coming from the transom came off, and it was rode a full throttle till it quit
    When a 2-stroke 'quits' at wot, this is a engine seizure most of the time.
    (i wasnt on it). a new head and gasket
    Why did it need a new head ?
    later it runs with good compression (~125psi across the board)
    Is this with the valves open or closed ?...

    You need both readings to know if your valves are working correctly. Not sure when you did the comp test, confused by "latter".
    With a wot engine failure, I would want to double check the compression carefully.
    As little as a 5# difference can be a broken ring.
    maybe i should take the stringer back off and take the air box off to check things out?
    Well you could, hate to sound like an a$$ and repeat myself,,,but I would take another compression test with the valves open and closed
    to get a good idea of what is going on, before I took the time to rip it down. A good compression test(valves open&closed) takes 5 or 10 minutes and will give you an excellent idea of what is or isn't going on in your engine.
    More than likely with a wot seizure you have cyl or piston damage.

    You say it is back firing, has a surge, idling real ruff, not starting easy, low top end. Well...
    I would not run it anymore at all, till you figure out what is wrong with it...or be willing to pay the price.

    Jmho
    allcool

  9. #9
    wakewhornc's Avatar
    Join Date
    Jul 2008
    Location
    Wilmington NC
    Posts
    339
    it didnt seize, it went into limp mode then shut off (no compression). it needed a new head because all the heat made the head warp (high in the middle low on each end, like a frowning face). and since the head was off i didnt want to take the chance so i put a new gasket on. when the head was off the cylinders looked perfect with barely even a mark (80hrs on engine). the compression check was with the valves closed after the rebuild with the throttle wide open and a cold engine. ill do another check with the valves open, i assume i just take the cables off and ziptie them open?

  10. #10
    Moderator OsideBill's Avatar
    Join Date
    Mar 2006
    Location
    United States
    Posts
    11,875
    +1
    30
    I would listen to the wise men that posted here, Trust me they know what they are talking about.

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. Is it common for 91 650 Waverunner fuel pump to go bad?
    By powerstroke250r in forum Yamaha Old School Skis
    Replies: 5
    Last Post: 12-07-2011, 02:33 PM
  2. what would cause this to happen this is a good one!
    By Mike H in forum 4-Tec Performance
    Replies: 26
    Last Post: 10-04-2010, 11:19 PM
  3. Will crack in impeller housing cause rpm not to go up as high??
    By vwmikey99 in forum 2-Stroke Performance
    Replies: 0
    Last Post: 07-30-2010, 12:42 PM
  4. will code 15 engine temp sensor mal cause gp1300r to go into limp mode?
    By djpeetur in forum Yamaha PWC Performance (2-stroke)
    Replies: 1
    Last Post: 06-01-2010, 11:27 AM
  5. What would cause rings to get "burnt" and stick?
    By Piranha Performance in forum Kawasaki Open Discussion
    Replies: 4
    Last Post: 07-22-2009, 12:14 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
  •