IF,,,,, you're not getting enough gas to run at high speed, are you able to
run the same amount of time at low speed? I suspect you're not getting full
fuel flow. I've never seen under the cover of the Yamaha but I assume you
have a diaphram fuel pump. If so, when's the last time you replaced the
diaphram and/or cleaned the screen? That's a likely place to look for a
fuel restriction.
LD
"Chris Rennert" wrote in message
. ..
Hey all,

I have a 1993 Yamaha Pro V 150 on a Ranger 354v Bassboat. When I put it
all
the way down, I start going really good, then it starts to sputter and the
RPMs drop in half. If I go back and pump the ball full of fuel, I can
once
again start going without problems. I am wondering what the possible
problems were.
I just had it in , and they removed a electric Primer pump that was wired
incorrectly. They told me that the vaccum from the motor is fine (no
restrictions) . So I am not sure what the hell it can be, and thought I
would post it here and get some opinions, of things to look at.

Thanks again,

Chris