Results 1 to 2 of 2
  1. #1
    Member
    Join Date
    Jul 2016
    Location
    FLORIDA
    Posts
    155

    Yamaha 2 stroke 90. Cold start issue

    Hey y'all. I just got my hands on a 97 2 stroke 90. When I start it cold it will die instantly. Almost like you shut the key off. Starts and dies, starts and dies, starts and dies. If you give it some throttle it will stay running. Then back to idle dies. Once it's warm it starts right up and runs fine the rest of the day. Each startup the rest of the day it will run for 30 sec or so at a high rpm then idle down. Like the prime start is working. It also only does this in the water. When on the hose out of the water it will not do this. I've cleaned the carbs and replaced the prime start valve. I'm running out of ideas and any help is much appreciated. Thanks.
    2016 Skeeter ZX225. 2016 Yamaha 225SHO
    99 Hells Bay Whipray. 99 Mercury 40

  2. Member Texas Rig's Avatar
    Join Date
    Jul 2004
    Location
    Cumming, Georgia
    Posts
    372
    #2
    I had 225 2-stroke that did that same thing. Turned out someone had removed the thermostats before I bought it.