I need about 20% choke to start and run the engine. Even after completely warmed up. If the engine is hot (~180*) and I kill the choke the engine will stall. At nearly any throttle. So some choke is always necessary.
Thanks. I thought that it could be an idle adjustment. Doesn't sound like it, eh?
Why not adjust the idle and find out? Gently seat the idle adjustment then back it out 1 1/4 to 1 1/2 turns. See what happens.
As noted the idle adjustment will not affect high speed operation.
Concur that the problem sounds like an air leak somewhere.
I would pull the carb drain/main jet access plug and drain it into a clear container and see if you get some gunk come out with it. If you have a mechanical fuel pump, give it a few strokes to flush a few ounces of fuel into the container and see what you got..hopefully clean fuel with no hitchhikers.
You should need 100% choke to start a cold motor, but after a few minutes, zero choke for normal operation.
What fuel are you running? Corn laced (ethanol) or E-zero? How much fuel do you burn thru in a season? I do not like ethanol fuels sitting in these old carbs for extended periods..I have found them to leave yellow honey/gel like gunk in the innards if they sit. If you use your boat regularly, not as much of an issue.
-Shawn "Holiday" - '89 Alura 35 #109 "Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!)
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You should need 100% choke to start a cold motor, but after a few minutes, zero choke for normal operation.
Funny you mention that.. It takes a bit of cranking to start it. I've never got it to start with 100% choke. Or 0% choke... 20%-40% seems to be the sweet spot. WOn't start with throttle up.. seems to like throttle all the way down. So you can crank it at 100% throttle and get nothing... turn throttle all the way down and it starts coming to life.
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