Page 1 of 4 123 ... LastLast
Results 1 to 10 of 31
  1. #1

    Join Date
    Oct 2008
    Location
    west MI
    Posts
    249

    Best ways to unstick a motor -pistons stuck to walls

    So this motor that i got wasn't winterized and the pistons are stuck to the walls. I can't get the cylinders off or get them to move at all.

    I have tried hitting it with wood and hammer
    Heating and hitting
    Taking the bottom apart and soaking the piston as well as moving the crank.
    Tried turning the crank with a breaker bar

    Nothing...

    Do I just have to spend more time working at it and keep hitting the pistons? I don't want to damage anything (although the piston are getting replaced at this point, with all the hitting i have done) but i don't to spin the crank out of alignment or mess up the needle bearings.

    Any other ideas?

    Can I use a hydraulic press? That is my last idea. I have worked and worked at this and i am just frustrated.

    Thanks in advance for the help....

    Dean

    Carb 951 btw.


  2. #2

    Join Date
    May 2006
    Location
    The wet left coast.
    Posts
    864
    +1
    68
    Needle bearings are the least of your worries

    If they are good and soaked with penetrating oil then I would try a hydraulic press.

  3. #3
    Norwegian Wiking
    Join Date
    Nov 2007
    Location
    Norway, Kristiansand
    Posts
    1,471
    Try filling the cylinders with diesel and let it sit over night... or several nights...

  4. #4

    Join Date
    Feb 2006
    Location
    Warner Robins, GA Home of the 2007 All-Star Little League World Champions!
    Posts
    4,362
    Try PB Blaster too. Let it soak about 10 minutes, then start tapping. Saturate again. Repeat.

  5. #5
    2000 GPRXP 4tec
    Join Date
    Dec 2005
    Location
    Charleston SC
    Posts
    2,650
    if your pistons are rusted up, more than likely your crank is done as well. But you could be lucky. Let it soak in some penetrating oil, then use some heat the next day and just keep pounding away.
    Or, take a small chisel and break the piston. I've done this before, takes a few good whacks. Make sure you use a nice sharp chisel too.
    I've heard of soaking the crank in kerosene before to get it back to tip top shape. I've never tried this, but just throwing some ideas out to you.
    Good luck.
    SHOOTER

  6. #6
    I have had the same thing happen to me, not fun. Took me atleast 2 hours of spraying and beating with a 2x4 and hammer. Make sure that you take the stud orings off before you even try to remove the cylinder. I got lucky, and the crank was in great condition. I bought the ski from someone that did not winterize it also.

  7. #7

    Join Date
    Jul 2005
    Location
    Lindenhurst, Illinois, United States
    Posts
    4,319
    Quote Originally Posted by Piranha Performance View Post
    IMake sure that you take the stud orings off before you even try to remove the cylinder
    + 1

  8. #8

    Join Date
    Oct 2008
    Location
    west MI
    Posts
    249
    Thanks guys,

    I have unloaded about a bottle of PB blaster in the last couple days on this motor top and bottom of pistons. I guess I will just have to keep working at it.

    I might try some gas and see how that does.


    IMake sure that you take the stud orings off before you even try to remove the cylinder
    I took the studs out, but i guess im not sure what the orings are? I will have to look back at the manual because i thought all it said was to remove the studs. Where are they on the motor
    Thanks for the ideas.

  9. #9
    If you took the studs out, then do not worry about the orings at this point, they probably are gone. Just make sure you get them out before reassembly.

  10. #10

    Join Date
    Feb 2006
    Location
    Warner Robins, GA Home of the 2007 All-Star Little League World Champions!
    Posts
    4,362
    The orings are somewhere on the studs. They all must have stayed in the cylinder stud holes, which is ok. You can fish them out after you get the cylinder off.

Page 1 of 4 123 ... LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Best way to install pistons
    By Pistonwash in forum Yamaha How To & FAQs
    Replies: 13
    Last Post: 08-31-2008, 11:17 PM
  2. best way to remove factory stickers
    By txgp1300r in forum Yamaha PWC Performance (2-stroke)
    Replies: 18
    Last Post: 07-07-2007, 04:03 PM
  3. Best way to remove pump shoe ?
    By slow1300 in forum Yamaha PWC Performance (2-stroke)
    Replies: 10
    Last Post: 02-21-2007, 09:32 PM
  4. best way to blow $4000?
    By RustyXP in forum 4-Tec Performance
    Replies: 25
    Last Post: 09-09-2006, 05:55 AM
  5. Best way to remove JB Weld, epoxy
    By Kinchyle in forum Sea Doo Open Discussion
    Replies: 3
    Last Post: 04-04-2006, 04:37 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
  •