http://www.tenkillermarine.com/boatparts/omctrouble.asp

I think their Mercury page has helped me find a problem with my 150 HP Merc.




"A.C." wrote in message
...
And since I like to talk...I'll add something I forgot....

It acts the same at full throttle, 3/4, 1/2 1/4 whatever....

So, it sounds less and less like a starvation problem...

Help!


"A.C." wrote in message
...
Since I got a good response on the "What's my boat" post, I'll toss out
a
problem I'm having with a 4.5 Evinrude, 1983 model.

Starts fine, idles fine, works fine...BUT....after a while, it will take
to
dying out.
By dying out, I mean it will be rolling along fine and suddenly it's
like
I
cranked the throttle back to idle. It drops to idle, but stays running.
Then
after 2-3 seconds, it comes right back up to full speed. It will run for
a
minute or so, back down to idle again. Now that I'm used to it, I just
keep
the throttle held wide open....it will drop off, idle for a few seconds,
then come back to top speed again. The odd time it will drop to idle,
and
stall. When it does that it will restart after a couple pulls (as if it
had
run dry of gas), but will start on the first pull if I choke it. Seems
to
be starving for fuel....?

Example. the other day my bud and I took the motor and the 10' aluminum
car-topper out to a large lake. We started it and headed for the
island.
It
ran full throttle all the way out, never missed a beat. the trip took
about
20 minutes. It sat for an hour or so while we shore-fished, then we
headed
back. It wasn't 2-3 minutes into the trip back, it started the
cycle...did
it all the way back to the dock.

It can't be over heating, since it would overheat on the 20 minute trip
out
to the island, not just on the way back, right?
And the water spitting out the back is warm, but not uncomfortable to
the
touch.

As far as fuel starvation goes, it's an integral tank, gravity fed. Fuel
cap
vent is okay, and I ran it with the fuel cap off completely, still does
it.
I've pulled the fuel tank, and replaced all the hoses. I've had the carb
off
3-4 times, tore it down completely and cleaned the jets. All looks
great.
The fuel filter has been replaced, along with the plugs.

To add excitement to a slow day of fishing, I dropped anchor, and then
fell
against the gunnal backwards, resulting in an upside down boat and
motor.
(wasn't running) We towed the works to shore, and went through the
process...you know the one. Drain, drain, flush, flush, pull, pull,
curse, curse... I was hoping everything we had to do after the
dunking
would either fix my problem or make it a whole lot worse. Nope....still
exactly the same.

If it was something 'broken' (head gasket, cracked cyl wall, etc) it
would
do it all the time. (Or at least after a few minutes of use, after it's
reached operating temp)

To rule out my tank and my hoses, I pulled my fuel feed off the carb and
ran
an external tank and hose right to the carb. (Had to have my passenger
hold
the tank up in the air )(gravity feed, ehh?) and it still did the same
thing.

I'd love to take it to a mech and say "Figure it out, and fix it",
BUT...I
just got the speedboat mentioned above and all spare cash is going into
that
project.

So.....what the heck's going on?

Thanks in advance
Andrew
Moncton, N.B. (Canada, ehh?)

Please do not "reply to"..address is bogus....use address below.
Thanks!
- please do the obvious to reply.