Yamaha 250 SHO problems

Drifterz Elite Fishing · Sun Jun 04, 2017 11:22 pm

Hey Everyone,
I have a 250 SHO pushing my fx20. It has been great so far but as of yesterday, im having trouble getting the boat on plane. When i punch the throttle is boggs down and wont really go over 10mph (enough to raise the front of the boat). If i hold the hot foot down it feels like it wants to bogg down more. In order to get on plane i have to let off the hot foot, and pump the pedal 2-3 times then push it all the way down, the motor boggs a little, then SLOWLY gets on plane. Once it gets on plane i can feel it "take off" and run hard.
any suggestions on what could cause this? i added 1oz of some fuel treatment (the dealer suggested using) for the first time, took it to my tournament and it ran like crap.
My thoughts tell me dirty injectors? or maybe dirty filters somewhere?

help!
thanks
Erik

HenderT · Post by **HenderT** » Tue Oct 17, 2017 9:48 pm

Hey buddy! How's the Yamaha 250 SHO so far? We are just finishing the installation of the new mud tires and tonneau cover on the current truck project and will check the Yamaha 250 SHO which is having almost the same problem. Any info will be appreciated.

fishinchips · Post by **fishinchips** » Wed Oct 18, 2017 1:49 pm

I had same problem it should be your fuel pumps on motor.
one is low pressure other is high pleasure..I would recommend
having both replaced.

JoeLanghans · Post by **JoeLanghans** » Wed Oct 18, 2017 9:12 pm

I had the same exact issue with my Mercury 225 last month. Fuel regulator, warranty.

HenderT · Post by **HenderT** » Wed Oct 18, 2017 9:12 pm

Alright, will check them out. Thanks

Robb R · Post by **Robb R** » Thu Oct 19, 2017 9:32 am

I had a similar problem . It turned out to be the spark plugs . Easy to check , just pull a few out and see what they look like , mine were corroded and built up. For some reason , Yamaha 4 strokes tend to build up a residue in the spark plug gaps . I replaced all of mine and problem solved .
Robb