Results 1 to 8 of 8

Thread: Engine swap?

  1. #1

    Join Date
    Jan 2011
    Location
    Salt Lake City, UTAH
    Posts
    24

    Engine swap?

    Question to you polaris experts out there, can a 1999 Polaris 1050 motor/engine be installed into the hull of a 1993 Polaris SL 650? I have a running 1993 SL 650, that still has the original blue triple motor, I have taken care of it for at least 8 years, and it still runs, but it is starting to blow smoke and slow down, therefore I am considering whether to sell it for small change or spend some money and do a complete engine swap! There is a 1999 Polaris complete engine for sale/bid on Ebay right now, that is what prompted my thinking.

    1 - Can it be done ?
    2 - Would it be easy or difficult?
    3 - would the drive also have be changed?

    Thanks in advance for any input!


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,584
    +1
    1,272
    Honestly, the 1993 hull is not the hull to be putting an engine conversion into.

    You can refresh or rebuild that 650 Fuji engine yourself and keep or sell the machine.

    OR you can sell the 1993 as is and buy a newer Polaris model. The hull, jet pump, and engine will all be better designs.

    I would suggest doing some tests and inspection of the current engine. You may just need a top end refresh to improve compression and bring the engine up to reasonable power.

    Start with a compression test. Test with all spark plugs out, throttle held wide open. Test each cylinder, then go back and test them all again. Battery must be strong throughout the testing.

    Tell us what the numbers are. We can go from there.

  3. #3
    urugol's Avatar
    Join Date
    Nov 2009
    Location
    Sydney, Australia
    Posts
    1,231
    +1
    3
    Quote Originally Posted by ftr0432 View Post
    1 - Can it be done ?
    2 - Would it be easy or difficult?
    3 - would the drive also have be changed?
    Anything can be done, but by the time you finish you would have sunk enough dollars into this to buy a ready to go 1050/1200 with change. You should bear in mind that it isn't just the engine, you will need the exhaust setup, intake + carbs, CDI, possibly a different throttle cable, engine mounts and I'm sure there would be more. As K447 said, you are best off refreshing what you have if it's running really poorly, check the compression first it tells a lot about the health of your machine.

  4. #4

    Join Date
    Jan 2011
    Location
    Salt Lake City, UTAH
    Posts
    24

    Thanks

    Thanks for the input!!! I will probably just do a top end!

  5. #5
    Canadian Beaver Inspector jkindt's Avatar
    Join Date
    Sep 2009
    Location
    Lethbridge, AB, Canada
    Posts
    1,721
    Quote Originally Posted by ftr0432 View Post
    ...but it is starting to blow smoke...
    Yup, it's a two stroke.

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,584
    +1
    1,272
    Quote Originally Posted by ftr0432 View Post
    ...I will probably just do a top end!
    Check compression first.

    If/when you take the cylinders off the engine, you should check the connecting rod big end bearings for play.

    The only way to replace the crankshaft bearings is to rebuild the crank itself, which basically means a full engine rebuild.

    Do the checks, find out what you have right now. That will tell you what the costs are likely to be to fix it up.

  7. #7
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
    Posts
    17,329
    +1
    30
    Quote Originally Posted by ftr0432 View Post
    Thanks for the input!!! I will probably just do a top end!
    If all else is in good shape, ^^^^ that's your cheapest bet.

  8. #8
    bowsniper's Avatar
    Join Date
    Aug 2008
    Location
    macomb,michigan
    Posts
    5,896
    +1
    6
    If all else checks out ok, Rebuld the carbs and change out all the fuel lines and filters. BTW.....All 2-stroke smoke! smoke means lubrication. let us know the compression numbers.. use a gauge that has the screw in type plug end and the release valve is close to the gauge. 120 psi would be good.. 90-100psi --bad.. Check the tank for debris or fuel lines rotting or possibly the pick up screens fell off the pick ups.

    swapping is gonna cost ya too much IMO.. better off buying a Pro785 if you want to go fast.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Original RXP/GPR Engine Swap (The Resurrection of Vigilante)
    By JFizzleJR in forum Conversion PWC Performance Skis
    Replies: 405
    Last Post: 08-25-2010, 03:15 PM
  2. RXP-XPL Engine swap
    By skeletor88 in forum Conversion PWC Performance Skis
    Replies: 23
    Last Post: 08-28-2007, 09:18 AM
  3. gpr engine swap
    By whiteelvis in forum Yamaha PWC Performance (2-stroke)
    Replies: 8
    Last Post: 11-15-2006, 12:07 AM
  4. seadoo hx engine swap
    By wedoseadoo in forum 4-Tec Performance
    Replies: 5
    Last Post: 10-27-2006, 01:12 PM
  5. Engine Swap
    By Fuhreal in forum Sea Doo Open Discussion
    Replies: 6
    Last Post: 08-14-2006, 12:01 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
  •