The problem is that somewhere in your intake system there is a leak.
Heres how to test for it. Put the earmuffs on the engine have a can of
starting fluid handy. While your attempting to start the engine, spray the
starting fluid lightly into the carb to help it start. Once it starts,
and is running, spray the starting fluid around the edge of the carb, and
the intakes. Spray it on all surfaces on the top of the engine that are
not electrical. When you hit the right spot, you will notice an instant
rise in engine RPM. To confirm, simply spray that area again. Once
located, you will know which gasket or part you will have to replace. Your
simptoms are typical with an air leak in the intake causing a too lean
condition.

IMHO
Jack

wrote in message
oups.com...
Hello,

I have an '88 Supra with a PCM Ford 351-Windsor engine.

I've been having problems with the engine in my boat for a few years.
For the first 20-30 minutes in the water, the thing runs like doo-doo.
It spits & sputters and barely gets on plane. After a while, the
engine gradually smoothes out. Eventually, the thing runs fine. I've
tried many things, including replacing the coil, replacing the points
with an electronic unit, replacing the fuel filter, and checking the
fuel pump.

I tried starting the boat for the first time since November. Now it
won't start at all. Instead, fluid is being spit out of the carb.
Also, while cranking, smoke (exhaust?) is coming out of the exhaust.
Occasionally it tries to fire up, but just spits a lot of fluid (gas?)
out.

Does anyone have any ideas what's wrong?

Thanks,

Donald