Page 1 of 4 1 2 3 ... LastLast
Results 1 to 10 of 35
  1. #1
    PolarisNut's Avatar
    Join Date
    Dec 2006
    Location
    Lower Michigan
    Posts
    1,809

    Finally working on a Fuji 750

    A friend of a friend is having a problem with his 94 750. Only has 60hrs on it (according to the display) and is in very good shape. Sounds like he took out the MAG cylinder. My guess is the whole fuel pump thing. Going to order parts for the pump and lines, etc. I also need an OS piston. Not sure how far yet. Thinking of going with a WSM piston, as he wants to keep the costs down. Whats the deal with the head gaskets? Are WSM ones ok? Do they need a sealer on them? Everything else I've worked on has used O rings for the heads. Any other tips or advice on this specific model and year? Going to do the obvious and check all filters and lines, etc for crud buildup.


  2. #2
    Moderator beerdart's Avatar
    Join Date
    Aug 2006
    Location
    CT
    Posts
    25,930
    +1
    1,407
    I would use OEM head gaskets. Smear some grease on them and you will be fine. Some peeps use copper coat..

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
    Posts
    17,330
    +1
    31
    Dicks of grand lakes on Ebay (stores section) has stock head gaskets for $10 ea or best offer.

    No sealer for them. I only use copper spray when I re-use them.

    Watch for restrictor in return line when replacing the return hose.

    Other than that pretty simple...

  4. #4
    ph2ocraft's Avatar
    Join Date
    Apr 2006
    Location
    Campbell, Ca.
    Posts
    14,100
    +1
    105
    WELCOME to the dark side of Polaris nut!!

  5. #5
    Moderator beerdart's Avatar
    Join Date
    Aug 2006
    Location
    CT
    Posts
    25,930
    +1
    1,407
    Oh no a Blue motor

  6. #6
    Quote Originally Posted by xlint89 View Post
    Dicks of grand lakes on Ebay (stores section) has stock head gaskets for $10 ea or best offer.
    Yea they do,

    Thanks, i needed those.

  7. #7
    PolarisNut's Avatar
    Join Date
    Dec 2006
    Location
    Lower Michigan
    Posts
    1,809
    Quote Originally Posted by ph2ocraft View Post
    WELCOME to the dark side of Polaris nut!!
    Quote Originally Posted by beerdart View Post
    Oh no a Blue motor
    LOL! That exactly how I feel. Even all of my sleds have been domestics...Going to tear into it tonight, so wish me luck

  8. #8
    PolarisNut's Avatar
    Join Date
    Dec 2006
    Location
    Lower Michigan
    Posts
    1,809
    Found the PTO cylinder to be toast. Other two cylinders had 135# compression. Tried getting the carbs apart to check for blockage, but those jet block screws must be welded in...Mikuni must put those in with air tools, because I always have a hard time getting them out for the first time without completely destroying them. An impact driver seems to do the trick. Will post a few pics tonight

  9. #9
    ph2ocraft's Avatar
    Join Date
    Apr 2006
    Location
    Campbell, Ca.
    Posts
    14,100
    +1
    105
    Harbor Freight has a 1/4 drive impact driver, works excellent for the jet block...actually it works great for all the carb screws.

  10. #10
    PolarisNut's Avatar
    Join Date
    Dec 2006
    Location
    Lower Michigan
    Posts
    1,809

    A few pics

    You can see the piston had decent wash...The fuel starvation had to happen fairly quickly. It's black because the engine was run for another 15 min after it holed the piston.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	burnt piston.jpg 
Views:	42 
Size:	68.7 KB 
ID:	82537   Click image for larger version. 

Name:	burnt piston2.jpg 
Views:	44 
Size:	84.8 KB 
ID:	82538  

Page 1 of 4 1 2 3 ... LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 94 SL 750 Wiring diagram for an Analog CDI Box used on a Fuji Digital engine
    By Superbawn in forum Polaris Tech Tips and Info
    Replies: 44
    Last Post: 06-19-2014, 04:05 PM
  2. looking for detailed engine specs on fuji 750.
    By Sargon in forum Polaris Open Discussion
    Replies: 3
    Last Post: 06-27-2012, 09:34 PM
  3. help...working on a 1995 sts 750 that isnt sending fuel to the carbs...pump dead?
    By MJE in forum Kawasaki PWC Performance (2-stroke)
    Replies: 4
    Last Post: 07-27-2010, 02:19 PM
  4. FS Polaris sl650 Parts most will work on 750, or 780
    By katz1002 in forum Polaris Classifieds
    Replies: 3
    Last Post: 12-13-2009, 11:37 PM
  5. Will Virage drive shafts and impellers work on 750 hull from 94?
    By JGringo in forum Polaris Open Discussion
    Replies: 14
    Last Post: 08-18-2007, 12:47 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
  •