Do I have an IAC problem?

Discussion in 'General Maintenance/Repair Questions' started by 12thMan, Jul 10, 2020.

  1. 12thMan

    12thMan New Member

    Jul 10, 2020
    2002 Sea Ray 200 Bow Rider. 5.0 EFI
    5.0 EFI
    Just purchased a 2002 SR 200 Bow Rider, 5.0 EFI from the original owner. Has 205hrs.
    back story: Sat for over 2yrs with half tank of fuel. I topped it off, added octane boost and ran it to 1/8th tank- very sluggish and wouldn’t get on plane. Replaced the fuel filter / separator, added injector cleaner and the sluggish operation ended. Runs great. On plane in seconds. No issues except....

    Boat fired Right up after launch and runs great when cold. Put it in neutral and it idles great. Cruises for about 20min without problem. Stopped, turned the boat off, kids play in the lake for 20-30 min, we go to take off and the boat won’t start. Had to engage manual throttle to get it started. Then it wouldn’t idle. Had to rev to 3500 rpm and throw it in gear to get going. Ran perfect. Cruised another 10-15min. Put it in neutral and it idled fine.
    At this point I didn’t want to press my luck and turn it off again. Took it to the dock, loaded up and here I am.

    Research is telling me IAC Valve. What is inconsistent With what threads and videos show is that when I get it in gear after it starts with the throttle it will run great again. It’s not stalling. ive also been told it could be the cold start or choke injector stuck open. Was told to replace distributor, plugs, wires etc.

    Looking for advice. First boat.
    Thank you to those who respond.
  2. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    If changing the fuel filter made that much difference you probably have more crap in your fuel system.
    You should of dumped that old fuel instead of adding to it. Full tune up is always a good idea.
    12thMan likes this.

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