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  1. #1
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    Jan 2009
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    Drexel
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    343

    Still shuts down 225hp ox66

    Ok, I have changed the primer, fuel line from the primer all the way to the filter housing, changed the fuel filter, plugs, has a new 02 sensor. I even drained the fuel from the vst housing and it looked good. Here's the deal.

    Running in a tournament yesterday, we go about 8 miles at 3/4 throttle through rough water at 55 mph. I see smoother water and a couple champions in front of me. I decide it's hammer time. I give it her all and hit about 71mph tourney loaded and catch the champions a 1/4 mile away and pass them. As soon and I pass them the motor shuts down for 5 seconds...no throttle response. I resume to get back to 71mph and catch and pass them again and it happens two more times. Now the rest of day it never did it again and we ran a good 40 miles.

    It is an intermittant reoccuring problem. The only pattern I have to it is that after I start it and floor it for a few minutes it shuts off a couple of times at wide open throttle but won't do it again the rest of the day??? What reasons would the ECM have for shutting down an ox66? Overheat and oil? those were both fine as far as I could tell, neither light comes on on my gauge cluster?



  2. Louisiana Bass Club Moderator
    Join Date
    Jun 2004
    Location
    Watson, La.
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    23,628
    #2

    Re: Still shuts down 225hp ox66 (smkur50)

    The filter in the VST should be changed.Draining it will not fix the problem.It does sound like something else is not right but you really should change all filters first.Then you may have to look at the fuel pumps.Not sure about the ECM because if that was the problem it would get worse after a while.

    JOHN202

  3. Member craigs06's Avatar
    Join Date
    Jun 2006
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    Residing in Baton Rouge
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    5,291
    #3

    Re: Still shuts down 225hp ox66 (smkur50)

    Mine did something similar last year, drove me nuts. Turned out the float in the VST was sticking. Looks like the float in a carburetor. Cleaned the varnish off of the needle and seat, no issues since.
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  4. Member
    Join Date
    Jan 2009
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    Drexel
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    343
    #4

    Re: Still shuts down 225hp ox66 (craigs06)

    forgot to mention, I replaced the fuel pumps already about a month ago. I guess I should just change the vst filter and check the float. I'll probably go ahead and send my injectors to hydrotec to be cleaned on top of that. After that I will have almost completely redone my fuel system.



  5. Member
    Join Date
    Mar 2007
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    Largo
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    278
    #5

    Re: Still shuts down 225hp ox66 (smkur50)

    Sounds like the VST to me also.


    2002 Pathfinder 2400V
    2002 Yamaha 225 OX66

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