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post #21 of 45 Old 09-23-2014
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Re: Carb Problem?

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Newhaul-
"find a mechanic you can trust."
Reminds me of something Benjamin Franklin said, that any three men can keep a secret as long as two of them are dead. So any dead mechanic should be trustworthy, although, I'd still have reservations about some of them.
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Sorry you feel that way there are many people that trust me to do the best job I can do on their vessels and I have been doing it for over 20 years so I must be doing something right

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Re: Carb Problem?

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Sorry you feel that way there are many people that trust me to do the best job I can do on their vessels and I have been doing it for over 20 years so I must be doing something right
If you have a big return clientele, you must be doing it right. When I said :

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First, not all "professionals" are experts, or conscientious
I didn't mean to imply that all "professionals" do sub-standard work.

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post #23 of 45 Old 09-23-2014
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Re: Carb Problem?

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I left a clean white paper towel. If that thing is stained next weekend, then that HAS to be it. Either way, I know I need to pull the carb.

ALSO, the mechanic failed to seat the choke cable bracket correctly. Not sure if this has anything to do with it, but I thought I would mention it.
You are going to want to get a few oil absorbent pads at your local auto parts store to use instead of paper towel. The ones I use are white also. I keep one under my carb all the time to keep tabs on what might be leaking out. I also have some Marvel Mystery oil in my gas.

If the mechanic messed up the choke cable it is possible that your choke butterfly is not closing/opening fully which could cause you to burn rich or be hard starting.

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Re: Carb Problem?

Pulled the carb this weekend. Was easier than I thought.
More gas found under it again. This time I left absorbent pads and sealed off everything, just in case the local insects were looking for a nice nesting spot.

Going to take it apart. Thanks again to all for your advice. The one thing I can't understand is why is it running rich while ALSO having a leak? Could a high float level cause leaking?
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Re: Carb Problem?

Running rich implies too much fuel which is consistent with your carb dripping gasoline. It is leaking because there is too much fuel.
Yes, it is probably the float valve/needle that needs re-thinking.
I'd get the carb rebuild kit from Moyer (new gasket, jets, float needle etc).

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post #26 of 45 Old 09-30-2014
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Re: Carb Problem?

^^ Yes, that would be the obvious and common reason.

The float may also be heavy (leaked).

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Re: Carb Problem?

If you are shutting off the gas at the tank, the leak may be from a loose fitting or a crack in the carb body, assuming the tank is higher than the carb. If the tank is higher & the fuel
is left on, & the float is set too high, or not closing, the leak could be from the float?

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Re: Carb Problem?

Update: took the carb apart and examined it closely. The float was indeed functioning. I also pushed the float down in a cup of water to see if it had any leaks. No leaks. Put it back together and installed it.
The engine fires up, runs steady (no more knocking), but still smokes. There is also what still appears to be some oily residue on top of the water from the exhaust. The oil pressure was steady at 40 psi. Oil level the same- not drinking oil. Set the mixture screw to one and half turns out. Tried turning it in half a turn and also the other way a half a turn. Doesn't stop the smoking/oily residue. I can't figure it out. Left absorbent pads under the carb. Going to see if it is still leaking on the next trip.
I guess checking the combustion is the next step. The only other thing I can think of is the Marvel Mystery Oil that is in the gas. I add a few ounces per gallon.
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post #29 of 45 Old 10-07-2014
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Re: Carb Problem?

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Update: took the carb apart and examined it closely. The float was indeed functioning. I also pushed the float down in a cup of water to see if it had any leaks. No leaks. Put it back together and installed it.
The engine fires up, runs steady (no more knocking), but still smokes. There is also what still appears to be some oily residue on top of the water from the exhaust. The oil pressure was steady at 40 psi. Oil level the same- not drinking oil. Set the mixture screw to one and half turns out. Tried turning it in half a turn and also the other way a half a turn. Doesn't stop the smoking/oily residue. I can't figure it out. Left absorbent pads under the carb. Going to see if it is still leaking on the next trip.
I guess checking the combustion is the next step. The only other thing I can think of is the Marvel Mystery Oil that is in the gas. I add a few ounces per gallon.
I used to run all my 2 strokes at 50:1, which is about 2-1/2 ounces per gallon. Looks like you are running about the same ratio in a 4 stroke, which could be the reason for the smoking. If you can run a separate tank, an outboard tank, perhaps, without the oil, & after a while the smoking stops, there is your cause.

Not sure about the leak, but it is evident because the oil in the fuel doesn't evaporate, like the gas does.

Paul T
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Re: Carb Problem?

I generally don't believe in magic elixirs, my faerie godmother told me they are all worthless. But I must confess that I've only heard good things about MMO, from people who have had, ah, intimate relationships with engines. Even in that context, I'd also say run that fuel out, or switch your fuel supply to a smaller "just gasoline" mix to see how it runs. Is there a chance you misread or miscalculated, and added way too much MMO?

I knew someone who misread and added 1/4 cup instead of 1/4 tablespoon of vinegar in a chocolate cake mix. Um, yummy. (Not!)
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