Page 1 of 2 1 2 LastLast
Results 1 to 10 of 13
  1. #1

    how do you do compression check???

    i tried to search how to but didnt find it??? help thanks (dealer said he did mine and it came out 140 all around.) (i have a comp gauge and wanna check myself)

  2. #2
    AFAIK, you take the plugs out and stick the gauge into the cylinder and with the throttle at wide open, crank.

  3. #3
    on 05 sc ic rxp thank you!!

  4. #4
    xBigDaddyx117's Avatar
    Join Date
    Oct 2008
    just a matter of finding the right size fitting for the spark plug holes.
    Just take out all the spark plugs and I unplug the injectors but its not nessesary, I just think that the fuel will make a better seal and throw me off, anyways just screw it into the hole and try to start the engine, let it turn over about 4-6 times, till you get a good reading. then do the same for all.

  5. #5
    thats what i was gonna do bigdaddy...thanks man. wasnt sure if i had to undo injectors (if you hold throttle at wot it will keep injectors from firing as well)

  6. #6

  7. #7
    I think you hold the throttle at WOT because you don't want any restriction to the cylinders.

  8. #8
    Moderator beerdart's Avatar
    Join Date
    Aug 2006
    Holding the throttle wide open prevents the ski from starting.

  9. #9
    That's the part I don't get. Some people run with all the plugs in and some run with them out. If they are out, how will it start?

  10. #10
    Moderator beerdart's Avatar
    Join Date
    Aug 2006
    With the throttle open the ECU will not spark or fire the injectors.

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. how do i check compression on 2013 vxs???
    By oldschool69 in forum Yamaha PWC Performance (4-stroke)
    Replies: 4
    Last Post: 10-21-2013, 10:02 PM
  2. How do i check my hours
    By Natas in forum Yamaha Old School Skis
    Replies: 3
    Last Post: 10-19-2008, 02:29 PM
  3. How do I check compression?
    By Mark S in forum 4-Tec Performance
    Replies: 5
    Last Post: 12-31-2007, 11:45 PM
  4. How do I check MPEM, engine not installed
    By Skripo in forum 2-Stroke Performance
    Replies: 2
    Last Post: 08-29-2007, 07:48 AM
  5. help. how do i check to see if my motor is seized.
    By Tony D in forum 2-Stroke Performance
    Replies: 11
    Last Post: 06-21-2007, 10:54 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