Having problem with optimax

[mikew]

Just wandering if any you guys had any suggestions. Having problem with my 225 optimax 2000 model. When you start it up it's runs fine idling and half throttle, but when you push throttle to the floor to hole shot. It starts jumping and knocking then it dies like it ran out of gas. It want start back until you trim the motor out of the water. Then it will die again just as soon you push throttle. Had mechanic check everything on it. Found no problems on computer and no problem on diagonistic test. Thanks for any help.

Had a similar problem last winter on my 250 optimax sportjet. Happened once and then not again for a while. When it happened again it just kept dying when I tried to power up. My mechanic replaced the fuel pump and all is well.

[cblazer]

Thanks guys for your help. I noticed my primer bulb would'nt pump up. So I went and got a new one and also replaced the line. It still want pump up and it is going the right direction. So what in the world would caues this.

[c22250ky]

Thanks guys for your help. I noticed my primer bulb would'nt pump up. So I went and got a new one and also replaced the line. It still want pump up and it is going the right direction. So what in the world would caues this.

check the antisiphon valve in the top of your gas tank it will be the elbow that your gas line is connected to maybe clogged also the pick up tube in the tank