Upon further inspection...
Uht-oh, no air filter. Not a good sign.
Not pretty.
Yummy.
No better down the intake port.
That may be a problem!!
Looks fine in there, at least.
And in there. (fine grit - aluminum oxide and dirt - fell in taking off the muffler)
Well. That carb sure is pooched!
It must have run yesterday off of the gas that overflowed from the carb! No way any gas was getting through that otherwise. Total fluke it ran at all!
Gotta be the worst carb I've ever opened up.
Cleaned up the intake...
Tried to drain the gas from the tank through the fuel line...barely dribbled out. Gave up and flipped it over a funnel. You can see the water in the fuel when you shake it up:
Needed some more cleaning with the tank off:
Everything got cleaned, save for the carb; it's a lost cause. Then I put it back together with the propane carb from a previous post, and ran it for a couple of minutes to mix up the oil and remaining water still in the crank case...
Milkshake! And that with the fresh oil put in yesterday.
It's been drained, and is sitting on end on a piece of card board to let every last drop of liquid come out.
Ran well. Thrummed along happily. Compression seems decent, and it doesn't burn oil, so I see no reason to tear it part to check that the bore isn't scored up from sucking in dirt/sand without an air filter. No junk in the cylinder - blew it out with the spark plug out. None in the muffler, either. Going with the hopeful theory that someone borrowed the air filter before it sat outside, then the intake got rain in it. Or there was so much in the gas that when the carb over-flowed, the gas and water sat in the intake. Intake valve was surprisingly spotless. Piston only had carbon on it. Spark plug was in great condition. No reason to think any got in to the cylinder.
Time to debate if I want to buy a knock-off carb(one with a built in petcock like the original, since the gas tank doesn't have one on it), another propane carb (for the other engine), or what...and wait for some 10w30 to come on sale, or go digging in my shed to see if I have any. (none of my cars use such heavy oil, don't keep it laying around). Or just run it with 5w30.
Vhatever. It's done until I find a use for it.