The retaining ring then goes in a groove in the
manifold to keep it from dropping down. To remove, turn the manifold upside down and pry the ring out. You will the be able to remove the
thermostat. If you need a diagram, look at page 5-11 of the OMC Cobra manual.

Jim wrote:


Sorry my mistake I thought u meant intake manifold, I guess I read it too fast.
"Jim Kelly" wrote in message ...
Who said anything about removing the intake manifold? If you re-read the reply, the words before "manifold" are "water distribution".
Wildest Dream wrote:

http://216.37.204.206/Actionsports/O...3&A=11&B=6hear
is a parts diagram the thermostate is #56 $15.99 . the only ring I see
below it is an o-ring looks to me as if it pops up or screws out. My book
don't go into any real detail, all it tells u is to drain the system, (Seloc
8-15 in the 1985 to 1995 OMC Cobra & King Cobra stern drive manual). I don't
see how taking the intake manifold off will help much just to turn it upside
down and hope it falls out, seams like alot of work to me. Of course I never
replaced one in a boat but I would still try to pry it out insted of going
through all that trouble. If its in a well then try some c-clip plyers, if
not just pry it up with a screw driver. it may be garbage when u get it out
but a new one that looks to just drop in @ only $16 is insurance enough for
me. But then again it isn't my boat. Good luck.
"Jim" wrote in message
om...
I took my '88 4.3L out for a cruise today before storing it and had
overheating problems. So I brought it home and hooked it up to the
flusher. If I pull the inlet hose on the thermostat housing there is
water when it's running. So I pulled the thermostat housing expecting
to find a thermostat in the intake manifold, but there isn't one
there. Rather there seems to be one built into the housing that can't
be changed? I must be missing something, right?