2000 OX66 -200 HP - motor runs fine then Bogs down and shuts off?

[creekchub]

Had the boat going around 45 miles an hour and all of a sudden the motor would just shut off -I pumped the ball a few times would run for another five minutes then would shut off..... i’m guessing a fuel starvation issue? Runs fine at low idle . Once I would punch it to get the RPMs up it would get up on plane and then just stall out....
I always use star Tron and ring free anytime I put gas(87 octane) in the boat the boat only gets used about twice a month with the outboard.
wondering if the fuel ball/fuel lines-Has something to do with this-Noticed one fuel line is a black color going to the ball while another one is a gray color-i’m guessing someone only changed part of the fuel line and perhaps the ball which never seems to get hard could be the culprit? Thoughts-I have had this boat for two years and the engine has run flawlessly and it was great today up until the last hour of the trip.... how would you approach a possible repair on this?

[KnightWKNF]

When was the last time you changed all of the fuel filters and the LP pumps?

[creekchub]

I have not changed the pumps at all but fuel filter is replaced each year..,,,

[Amistad Tackle]

Shutting off, as in the motor completely shuts off? Could be fuel pump relay or the high pressure fuel pump. The relay is a common issue with this engine. Relay is cheaper and easy to change. You can get an aftermarket VST pump from Amazon. OEM is expensive.

[creekchub]

Is the aftermarket VST just as good as the expensive OEM one?
thanks for the info :)

[creekchub]

For right now I am going to swap out the fuel ball and fuel lines since one is black and one is gray and the ball doesn’t seem to get hard and also take a look at the fuel filter and go from there......

[KnightWKNF]

I have not changed the pumps at all but fuel filter is replaced each year..,,,

Which filter did you replace? Just the one in the clear tube? There's 2 more that should get replaced at the same time.

[Amistad Tackle]

Is the aftermarket VST just as good as the expensive OEM one?
thanks for the info :)

Do not know. All I know is it is a lot less expensive.

If it is shutting off, as in completely shutting down, it is likely the relay. If it is bogging it could be the bulb or a filter, or a bad low pressure fuel pump.

[creekchub]

One of the low pressure fuel pumps is leaking going to replace all three of them next week and also replaced the old fuel filter and ball....

[OverTimeAgain]

Hey I had the exact same issue on my ox66.



It is the low pressure fuel pumps. Replace all 3 and you will be good to go.

[creekchub]

Well I had my mechanic replace all three low pressure fuel pumps finally got the boat out for a good run and it’s still bogging down..... put a new fuel ball and fuel lines. I’m guessing the vapor separator tank must have some issues does that sound likely?
Boat will run for a quarter mile and then all the sun hesitate almost like it’s starving for fuel And then runs fine for 15/20 seconds and then does it again ( anyone have advice or suggestions on what to do?

[techman]

I had the same problem. It was the o2 sensor.

[creekchub]

Decided we will replace 02 and service vst- keep u posted !

[creekchub]

My mechanic discovered that the filter in the VST was completely clogged he removed / it cleaned it -as well as the VST and put it back in place and also serviceD the O2 sensor.