Results 1 to 12 of 12
  1. #1
    Member
    Join Date
    Aug 2017
    Location
    Kentucky
    Posts
    64

    2002 Yamaha 250 ox66 suddenly shut down

    Hello all,
    Last weekend after 3 days of running and fishing without issue or any kind of symptom my engine decided to shut down while running on plane. It acted as if the kill switch had been pulled. Just lost all power and coasted to a stop. It will crank just fine but won't even think about turning over. I've searched through a lot of these threads and have found several things to check but all the fuel problems i've found had symptoms leading up to the problem and none seemed to have just shut down. While out on the water, I pulled the kill switch and connected the wires directly, not it. I did notice that the fuel bulb was soft and after squeezing it it would never get firm. When i lifted up my back boat panel and visually inspected the batteries and such I noticed that the fuel filter was half full of air/fuel. Obviously, I thought it might be sucking air so i disconnected the lines and re-routed the fuel line directly to the motor from the tank and still nothing nor would the bulb get hard, firmer than previously but still not hard. Checked the in-line fuse, not it.... i'm thinking VST issues, fuel relay, or high pressure fuel pump, but don't they usually freeze up from bad gas and storage not during use? Also I have never filled the gas tank without adding Yamaha ring free, use non ethanol gas when available but that isn't often in my area. I know it's not a lot of info to go on but anything helps at this point, THANKS!

    On a side note, in case anyone is wondering, if you happen to slice your finger wide open while stranded in the middle of Lake Cumberland and it's pouring down raining, dark, nearly freezing temperatures, trolling motor batteries are dead after trying to get back in the wind, and you are still miles away from any docks, you've called the water tow service and they don't answer, your phone is going dead, and you haven't seen a single boat since the break down, fish and wildlife nor the water patrol will come nor will they do anything but give you the tow service number that doesn't answer. In his defense it was Easter Sunday and he did finally call me back before my phone died $250 an hour from the time of the call and he had to launch and come find me....
    5 hours down on the water, $$$$ tow and 6 stitches later I got my boat out of the water.

    So the moral of the story is, a bad day fishing, isn't really better than a good day at work!

  2. Member
    Join Date
    Nov 2004
    Location
    Columbus, Indiana
    Posts
    4,235
    #2
    Sounds like the fuel pump relay. When you key on, do you hear the pump run for 5 seconds?

  3. Moderator 21XDC's Avatar
    Join Date
    Sep 2004
    Location
    Westland Michigan
    Posts
    63,454
    #3
    Quote Originally Posted by 201pro View Post
    Sounds like the fuel pump relay. When you key on, do you hear the pump run for 5 seconds?
    I agree.

    Marks Props 317-398-9294, 1850 East 225 South, Shelbyville, Indiana 46176 propellerman59@gmail.com http://www.marksprops.com/index.html

  4. Member
    Join Date
    Aug 2017
    Location
    Kentucky
    Posts
    64
    #4
    Come to think of it no. thx

  5. Moderator 21XDC's Avatar
    Join Date
    Sep 2004
    Location
    Westland Michigan
    Posts
    63,454
    #5

    Marks Props 317-398-9294, 1850 East 225 South, Shelbyville, Indiana 46176 propellerman59@gmail.com http://www.marksprops.com/index.html

  6. Banned
    Join Date
    Apr 2009
    Location
    Bridgewater, NS
    Posts
    9,054
    #6
    Do you have fire at the spark plugs? Start with the basics.

  7. Member
    Join Date
    Aug 2017
    Location
    Kentucky
    Posts
    64
    #7
    Update, replaced the fuel relay, ($230 later) and yes I do have fire at the plugs, she still isn't turning over. Still not hearing the fuel pump come on when I turn the key on, just decided to take her to the shop and let the pros handle it from here. Just feel like it's something simple I'm missing but at this point I need it fixed and don't have the time nor knowledge to go much beyond this.

  8. Moderator 21XDC's Avatar
    Join Date
    Sep 2004
    Location
    Westland Michigan
    Posts
    63,454
    #8
    Sounds like your fuel pump is the problem... If you remove the cowling, You should hear the pump turn on for 3-5 seconds building pressure.

    Marks Props 317-398-9294, 1850 East 225 South, Shelbyville, Indiana 46176 propellerman59@gmail.com http://www.marksprops.com/index.html

  9. Member
    Join Date
    Apr 2013
    Location
    Bossier City, LA
    Posts
    46
    #9
    Had the same thing Happen a couple years ago. After changing out fuel pump and still having problem it ended up being a bad ignition switch. Does your instrument backlight work when key is on? That's how we figured out it was a bad switch.

  10. Member
    Join Date
    Aug 2017
    Location
    Kentucky
    Posts
    64
    #10
    It's at the shop now so I can't check on the light. That would be great if it's the ignition switch. I will update this thread when I hear from the shop.

  11. Member
    Join Date
    Oct 2010
    Location
    Texas
    Posts
    1,331
    #11
    Likely the VST pump has quit. Had the same thing happen, but luckily was within sight of the ramp. If it is the pump I would also replace the relay at the same time.

  12. Member
    Join Date
    Aug 2017
    Location
    Kentucky
    Posts
    64
    #12
    Just to update for future readers...It was the Fuel pump, man those things are expensive! Thanks for the replies.