Is this Engine Done? - Page 2
pxctoday

» Log in

User Name:

Password:

Not a member yet?
Register Now!

» Find OEM Parts

» Jobs

» wallpapers

Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 25
  1. #11
    PWCToday.com Is My Home Away From Home Myself's Avatar
    Join Date
    Jun 2006
    Location
    Arkansas
    Age
    45
    Posts
    7,220

    Re: Is this Engine Done?

    You need to pop the crank out of the lower case half. Spin each bearing by hand and see if they are buttery smooth. What I like to do is submerse the crank in a couple gallons of diesel fuel. Then spin each bearing around and around. This will clean them out. You can use a small cup or cutoff water bottle to dump fuel straight onto the rod bearings. Brush the rods and crank counterweights with a bottle brush. Then set it out on some cardboard and FEEL EVERY bearing for smoothness. If it's all ok just let it sit in the sun on that cardboard and drip dry. The diesel fuel will leave a film so nothing rusts.
    While the crank is out look closely at the lower case in the area where the rods spin. If anything looks dented, check the bottom side for a crack.
    As for the top half of the case....just smooth those rough edges and run it, no problemo.
    http://www.facebook.com/twinlakesjetskirepair

    '89 Kawi 650SX 42.4 GPS
    +3" stock pipe, ported ex. manifold, drilled waterbox, blueprinted pump, Ocean Pro ride plate

    '99 Yama GP1200 65U 61.8 GPS
    ported cylinders, matched cases, milled head, blueprinted pump, long ride plate

    '96 Seadoo HX 717 53.13 GPS
    light porting, massaged cases, lightened flywheel, port matched manifolds, Rossier pipe, stubby pump cone

  2. #12
    PWCToday Regular 831's Avatar
    Join Date
    Jul 2019
    Location
    Ca
    Age
    35
    Posts
    96

    Re: Is this Engine Done?

    Quote Originally Posted by Myself View Post
    You need to pop the crank out of the lower case half. Spin each bearing by hand and see if they are buttery smooth. What I like to do is submerse the crank in a couple gallons of diesel fuel. Then spin each bearing around and around. This will clean them out. You can use a small cup or cutoff water bottle to dump fuel straight onto the rod bearings. Brush the rods and crank counterweights with a bottle brush. Then set it out on some cardboard and FEEL EVERY bearing for smoothness. If it's all ok just let it sit in the sun on that cardboard and drip dry. The diesel fuel will leave a film so nothing rusts.
    While the crank is out look closely at the lower case in the area where the rods spin. If anything looks dented, check the bottom side for a crack.
    As for the top half of the case....just smooth those rough edges and run it, no problemo.
    Thanks for the help Myself. I appreciate it. I'm going to do exactly that.

  3. #13
    PWCToday.com Is My Home Away From Home wmazz's Avatar
    Join Date
    Jul 2013
    Location
    Riverside, CA
    Age
    62
    Posts
    3,335
    Blog Entries
    6

    Re: Is this Engine Done?

    Is it a 97 1/2' white engine, or a 98' silver engine. Does it have the
    stock plastic air-box/ flame arrestor?

    Water damage killed the piston?

    A good picture of the damaged bottom case would help identify
    or rule out another possibility.


    When a piston breaks it is very possible that small pieces of aluminum
    have settled inside the con-rod bearings. The only certain way to
    remove the piston bits is to disassemble the crank, and clean or replace
    the rods, and main bearings.

    Just FYI. Generally speaking a dealership (back in the day) would not risk
    cleaning a crankshaft.


    Bill M.

    In addition to Myself's instructions, you can inspect the roller bearings
    with a fine pick, and rotate the bearing to look for debris in-between the
    oil slot and the roller bearing.
    Horsepower == Speed, RPM != Speed



  4. #14
    PWCToday.com Is My Home Away From Home john zigler's Avatar
    Join Date
    Mar 2003
    Location
    wisconsin
    Age
    55
    Posts
    9,682

    Re: Is this Engine Done?

    951's are KNOWN for crank failures..... Just a FYI
    RCJS also doing business as WATCON
    608-743-1305 9am to 5pm CST m-f
    email watcon@watcon.com

    Please visit our web site

    new parts / products / services www.watcon.com
    thank you

    Please check out and like WATCON on Facebook

  5. #15
    PWCToday.com Is My Home Away From Home WFO Speedracer's Avatar
    Join Date
    Aug 2006
    Location
    Al-ugh-bam-ugh
    Posts
    28,199

    Re: Is this Engine Done?

    Most 951 crankshaft failures are on Direct Injected skis. I rarely had issues with crankshafts on carbed skis and I never saw a rod go through a case and I have worked on a lot of 951's
    Y'all know me, still the same O.G. but I been low-key
    hated on by most these &^$$@s with no cheese, no deals and no G's, no wheels and no keys, no boats, no snowmobiles, and no skis, mad at me cause I can finally afford to provide my family with groceries

    WWSRD , What would Speed Racer do ?

  6. #16
    PWCToday Regular 831's Avatar
    Join Date
    Jul 2019
    Location
    Ca
    Age
    35
    Posts
    96

    Re: Is this Engine Done?

    Quote Originally Posted by wmazz View Post
    Is it a 97 1/2' white engine, or a 98' silver engine. Does it have the
    stock plastic air-box/ flame arrestor?

    Water damage killed the piston?

    A good picture of the damaged bottom case would help identify
    or rule out another possibility.


    When a piston breaks it is very possible that small pieces of aluminum
    have settled inside the con-rod bearings. The only certain way to
    remove the piston bits is to disassemble the crank, and clean or replace
    the rods, and main bearings.

    Just FYI. Generally speaking a dealership (back in the day) would not risk
    cleaning a crankshaft.


    Bill M.

    In addition to Myself's instructions, you can inspect the roller bearings
    with a fine pick, and rotate the bearing to look for debris in-between the
    oil slot and the roller bearing.
    98 silver. Yes it's completely stock. A broken oil line killed the piston. Switching over to pre-mix to prevent that in the future. There was no other damage that I noticed other than the pics I posted on the back side top case by where the reeds go. I spent about 2 hours cleaning out the crank yesterday and I THINK it is all in all good. There was some very fine metal that came out on the back end but not a lot. Mainly from the piston rod area (bottom of case not rod bearings). The front portion of the crank was completely unaffected it seemed like. I got it oiled up and back together last night. It's my first time getting into the bottom end of an engine so I am pretty green. I think I'd probably cause more damage disabling the crank itself than good.

  7. #17
    PWCToday Regular 831's Avatar
    Join Date
    Jul 2019
    Location
    Ca
    Age
    35
    Posts
    96

    Re: Is this Engine Done?

    John and wfo, the crank I think is ok. It was a broken oil line that caused all this. It still had the original painted lines from the factory.

    Quick side question. For an engine swap on Sea Doos I read you have to realign the engine. Would I have to do the same even though it is the same engine going back in? I removed the bottom half by taking out the front mount and nudging the engine forward off the rod to get it out.

  8. #18
    PWCToday.com Is My Home Away From Home WFO Speedracer's Avatar
    Join Date
    Aug 2006
    Location
    Al-ugh-bam-ugh
    Posts
    28,199

    Re: Is this Engine Done?

    It is advisable to check the alignment any time you pull the engine out, there is no guarantee is was properly aligned before
    Last edited by WFO Speedracer; 06-08-2022 at 08:12 AM.
    Y'all know me, still the same O.G. but I been low-key
    hated on by most these &^$$@s with no cheese, no deals and no G's, no wheels and no keys, no boats, no snowmobiles, and no skis, mad at me cause I can finally afford to provide my family with groceries

    WWSRD , What would Speed Racer do ?

  9. #19
    PWCToday.com Is My Home Away From Home john zigler's Avatar
    Join Date
    Mar 2003
    Location
    wisconsin
    Age
    55
    Posts
    9,682

    Re: Is this Engine Done?

    Quote Originally Posted by WFO Speedracer View Post
    Most 951 crankshaft failures are on Direct Injected skis. I rarely had issues with crankshafts on carbed skis and I never saw a rod go through a case and I have worked on a lot of 951's

    We have seen many bearing failures on low hour carbed engines.
    RCJS also doing business as WATCON
    608-743-1305 9am to 5pm CST m-f
    email watcon@watcon.com

    Please visit our web site

    new parts / products / services www.watcon.com
    thank you

    Please check out and like WATCON on Facebook

  10. #20
    PWCToday Regular 831's Avatar
    Join Date
    Jul 2019
    Location
    Ca
    Age
    35
    Posts
    96

    Re: Is this Engine Done?

    Quote Originally Posted by WFO Speedracer View Post
    It is advisable to check the alignment any time you pull the engine out, there is no guarantee is was properly aligned before
    Thanks Speedracer. Looks like I'll be having to order a $300 tool for this it'll come in handy I suppose.

Page 2 of 3 FirstFirst 123 LastLast

Thread Information

Users Browsing this Thread

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

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBadvanced CMPS v4.2.0