Results 1 to 5 of 5
  1. #1

    Join Date
    May 2005
    Location
    Minneapolis
    Posts
    763
    +1
    26

    Testing Injectors

    Is there an easy way to test the injectors - I bought a 20 hour RXT that runs like it is starving out of fuel - worse when part throttle - rpm's vary 400 or so like surging except surging lower. Changed plugs and coils. No change. Idles fine. starts fine. RPM's down to 7550 or so. Ran a tank of gas and wil try some fresh gas. Compression fine. Oil fine. Maybe a plugged fuel filter? Your thoughts please.

    Thanks

    Tim


  2. #2
    dhoad's Avatar
    Join Date
    Aug 2005
    Location
    North Aurora, Illinois, United States
    Posts
    3,182
    +1
    6
    have you checked the supercharger slip or is the boat NA?

  3. #3
    idoodou's Avatar
    Join Date
    Mar 2009
    Location
    cincy,ohio
    Posts
    765
    +1
    30
    sounds like the supercharger to me need to pull it out and send to have rebuilt with 08 update kit also check to see if it has ceramic clutches and if there still there if their not you got big problems

  4. #4

    Join Date
    May 2005
    Location
    Minneapolis
    Posts
    763
    +1
    26
    I'll check it (s/c)- but I think it's fine - I have a spare to swap out - the surging feels more like a fuel issue

  5. #5
    Moderator beerdart's Avatar
    Join Date
    Aug 2006
    Location
    CT
    Posts
    25,929
    +1
    1,407
    Try a fresh set of spark plugs..

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Flow Testing injectors?
    By dhoad in forum 4-Tec Performance
    Replies: 13
    Last Post: 10-07-2009, 11:08 AM
  2. How do you test injectors
    By iron head in forum 4-Tec Performance
    Replies: 2
    Last Post: 07-12-2009, 06:20 PM
  3. Fuel Injector Flow Testing
    By Gatorcountry in forum Yamaha PWC Performance (2-stroke)
    Replies: 9
    Last Post: 11-13-2007, 09:12 PM
  4. How to test Fuel Injectors
    By Mr Bill in forum Yamaha How To & FAQs
    Replies: 6
    Last Post: 07-18-2007, 04:23 PM
  5. Test results gas mileage with 42# injectors
    By Mark S in forum 4-Tec Performance
    Replies: 6
    Last Post: 05-21-2006, 07:54 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
  •