04 yamaha 250 HPDI

by joseph
(Estero Florida)

Boat will run perfect all day then coming back it will be running on plane (4400-4600 rpms) then all of a sudden it goes to 3100- 3500) and wont stay on plane. I've brought it to certified mechanic 6 times. Engine only has 300 hrs. What was replaced
- Oil injector/ pump rebuilt. This was done twice because the first time there was a problem and too much oil was being used. This fouled the plugs and the prop/ exhaust was filthy.
- twisted fuel line (I did not believe this)
- exciter coils
- even changed prop size

This last time while I could not get on plane, I had a friend pump my fuel ball. I put boat in neutral and it got on plane for about 1-2 mins. So.... I'm thinking my problem may be fuel related.

Any input form others would be appreciated!

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Yamaha Outboard Forum.