Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 2 of 2

Thread: 3W 80 XI


  1. #1

    Join Date
    Mar 2002
    Location
    Salisbury, MD
    Posts
    57
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    3W 80 XI

    I hope someone can help with a problem I have with a 3W 80 XI. Last season it ran perfect this year it won't idle down when coming in for landing. I adjusted both the low and high speed needles that didn't help and checked the throttle servo. I wonder if gas with ethanol has done something to cause this. I'll appreciate any feed back that I get and thanks for your time.

  2. #2

    Join Date
    Feb 2002
    Location
    Valley Springs, CA
    Posts
    18,602
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3W 80 XI

    Typically a problem with a slow idle down eminates from an excessively lean low needle. It can also be caused by the engine sucking air somewhere around the induction tract. You have had etahnol in your gas for some time now so I doubt that to be the cause. Worst case you had the diaphragms in the carb wear out which can be resolved by picking up a $10.00 carb rebuild kit and replacing them. A 20 or 30 minute job.

    So first thing I would do is adjust the low needle a little richer. Since you stated you had adjusted both needles it makes me think that's where the problem started. If that doesn't work I would try having the engine running while I sprayed some WD-40 around the base of the carb to see how the engine reacts. If you're not spraying into the carb, and only onto the base of the carb, changes in RPM would indicate a likely air leak that needs corrected. Normally those are also easy to fix with either a simple re-surfacing of the plastic insulator riser or installing new gaskets.

    While I was doing all the above I would take the time to go through the plumbing to check for leaks or line splits from the carb all the way back to inside the tank where the tubing connects to the pick up line and clunk.
    Never lie, and never minimize or gloss. Tell it like it is and let the pieces fall where they may. The truth always wins.


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 06:31 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.