engine vibrates
Close
Login to Your Account
Snowmobile Fanatics - Snowmobile Forum - Powered by vBulletin

engine vibrates

This is a discussion on engine vibrates within the Polaris forums, part of the Brand Specific Snowmobile Discussion category; Hi ! i have a widetrack from 1990 with 488 Engine and 2 carbs. i changed the crankshaft and pistons on it last Winter , ...

"); }
Results 1 to 3 of 3

Thread: engine vibrates

  1. #1
    Junior Member
    This user has no status.
     

    Member #
    69804
    Join Date
    Feb 2019
    Posts
    2

    engine vibrates

    Hi !
    i have a widetrack from 1990 with 488 Engine and 2 carbs.

    i changed the crankshaft and pistons on it last Winter , but i cant get it too run smoothly, the Engine vibrates when i push the throttle .
    anyone who has any ide what it can bee ?

    i tried too sync the carbs with no success .

    greetings Mikael

  2. #2
    Senior Member
    This user has no status.
     

    Member #
    12399
    Join Date
    Feb 2006
    Location
    WNY
    Posts
    2,548
    Welcome. This could be a number of things. I would start with a wellness check of the engine. Do a compression test. How does the engine run other than the vibration? Have you verified good spark on both cylinders? Maybe change spark plug caps as cheap insurance?

    Was the clutch removed/disassembled during the engine work? Clutches are balanced and need to go back together the way they were from the factory or be rebalanced. This could cause vibes and also damage bearings/seals on the pto side.

    A bad engine mount can cause vibes. Verify all mounts are in good condition and tight. Verify that the torque stop is set correctly. This is a small adjustable stop, usually in the area behind the primary clutch and keeps the engine from torquing/twisting too much. There is a spec but usually just get clutches aligned and all mounts torqued and run this up so it just touches the engine block and tighten the lock nut.

    Good luck, keep us posted.
    Polaris...it IS the way out!

  3. #3
    Junior Member
    This user has no status.
     

    Member #
    69804
    Join Date
    Feb 2019
    Posts
    2
    Hi again!
    The clutch is removed from the engine.
    On high revs is sounds pretty good but when it revs down i vibrates again, can it have anything with the ignition timing that makes it vibrates.

Remove Ads

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. Engine rebuild Skidoo engine
    By bott12 in forum Engine
    Replies: 0
    Last Post: 01-18-2014, 02:59 PM
  2. Edge 800 engine parts.. parting out a complete engine
    By yz400ex in forum Engine, Drivetrain, Pipes, and Cans
    Replies: 2
    Last Post: 10-16-2009, 11:08 PM
  3. snowmobile jerks and vibrates
    By jlbair81 in forum Yamaha
    Replies: 21
    Last Post: 02-11-2007, 09:56 PM
  4. Engine rebuild (video clip of engine running)
    By 98700xc in forum Polaris
    Replies: 15
    Last Post: 10-06-2005, 09:12 PM
  5. engine, and engine chassis needed
    By madcow in forum Parts and Accessories
    Replies: 0
    Last Post: 12-05-2003, 04:11 AM