150 HPDI 2000 2 stroke

[Truck-1 FF]

After launching and running at 2800-3000 rpm for 30-45 min. then floating around for about the same, won't restart. Been service for same several times, can't get right. any thoughts??? Thanks

[99yam40]

if it does not restart how do you get back to dock?
what did the Yamaha experts that serviced it several times do and say?

[Truck-1 FF]

Sea Tow back to the dock.......they would always say...."well we have to do a general service" and when I'd say that's been done, didn't have much beyond that....Just looking to see if anyone here has a different approach.....Of course when I've taken back after it's done it again, it won't reproduce the problem, one shop had it out all day on the water trying to reproduce the issue, couldn't

[99yam40]

what did they do as far as service that did not help?

need to test while problem is happening.
is there spark to any plugs?
is the rail pressure in spec.
is the motor flooded?( too rich to fire the cylinders)
did you try opening the throttle to allow more air in?

hard to give any answer if nothing is know but it will not start