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kozmo6969
 
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Default 115 mercury reed valves

"Rod McInnis" wrote in message ...
"kozmo6969" wrote in message
om...

motor hard starting, dies when in water after take
off, problem restarting. any help here????? thanks koz


Can you elaborate on "dies when in water after take off" ??

If the motor dies when it is running at some significant speed then the
problem is not going to be the reeds.

The reeds are the valves that prevent the gas/air mixture in the crankcase
from going back out the carburetors. Ideally,. the reeds lay flat against
the reed plate and form a perfect seal. As the reeds get old, however, they
tend to pick up a bit of a bend and/or warp. This allows them to leak a
substantial amount.

This is usually a problem only at idle. At higher RPMs, the amount of leak
is less noticeable and the higher pressures tend to force the reed closed.
If the engine was running OK at some RPM, there is little that a reed could
do that would cause it to just die.

Hard starting, poor idle and hesitation when accelerating is likely to be
reeds.

On some engines changing the reeds is a trivial task. On other engines you
have to take so much stuff off that it becomes a nightmare. If you can get
to them without too much effort I would just change them to eliminate one
source of problems.

Rod

i got it running rod, disconnected the fuel tank, ran a new line into
a fresh can of gas, hit it with a shot of starting fluid, and it ran,
and ran good. idled great.and would restart right back up. so i think
that i have bad gas in the 30 year old tank.so now i have to flush it
out. and it still starts very hard when cold. the true test is on the
lake. the last time i got it running in the driveway it ran good, took
it to the lake, and could not keep it running. it would start very
hard, then when hit wot it would stall. so i hape i found my problem,
the carbs do not drip fuel when it runs, and it sounds good. think i
found my problem, now i hope to make it start eaiser. thanks, koz