[snapperman]

I have one of these fab Yamaha 90hp. It's been out of service for a while, I've just got it going on premix and have found the precision injection is not working. I suspect it has air in it as it has been lying on its side for over three months. I was advised it had a bleed screw but where? cheers Snapperman

[clanton]

If you are speaking of the oil injection, the bleed screw is on the oil pump, small philpps screw.

[John from Madison CT]

The Bleed screw is located on the oil injection pump itself.It is a small phillips headed screw with a tiny gasket.You should see it no problem.Just to be sure though, I always run at least a couple of tanks of premix thru the engine and then look to see if the oil reservoir tank has a noticable change in volume.Good Luck,john

[John from Madison CT]

Clanton: Geez, what are the odds ? We posted an answer in the same minute.Time to buy a lottery ticket.John

[snapperman]

Thanks all, on my motor it appears to be a small screwdriver head not phillips and it's made of brass will try it laterMany thanksSnapperman