SBT Jetski Engines, Parts & Accessories

Results 1 to 2 of 2
  1. #1
    Oct 2018
    Brooklyn NY

    Question Yamaha 97 Waverunner Engine races during flush

    When I start engine flush on 97 Yamaha Waverunner, the engine starts racing uncontrollably. Must stop flush using emergency shut down by pulling string off handlebar. Very afraid I will blow engine. Other symptoms include engine conks out sometimes when doing quick accelerate onto dock - don't know if that is related. Otherwise, ski performs ok and makes up to 42mph out on the water and there is no uncontrollable engine racing. I've heard this may be a vaccume leak. What should I be looking for?

  2. #2
    Jun 2016
    Clearwater, Florida

    Default Re: Yamaha 97 Waverunner Engine races during flush

    Not a vacuum leak, an air leak into the crankcase.
    Possible crank seals leaking.
    Intake manifold, or carb gaskets leaking.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. engine misses yamaha waverunner 3 650 need help
    By capriceondros in forum Yamaha
    Replies: 0
    Last Post: 08-07-2009, 08:27 PM
  2. Replies: 1
    Last Post: 06-03-2007, 01:31 AM
  3. Replies: 2
    Last Post: 06-04-2006, 12:47 PM
  4. flush kit on Yamaha Waverunner LX- help!
    By mobilefleet in forum Yamaha
    Replies: 3
    Last Post: 09-02-2005, 03:53 PM
  5. Engine running rough/races when flushing
    By Bpalik in forum Sea-Doo
    Replies: 26
    Last Post: 08-22-2003, 09:05 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