Good advice from all...we finally got it RUNNING !!! But, it will only run for about a minute at a time. Wait for about a minute and it will start up and run for about a minute again. BACKSTORY...today we pulled all of the plugs, did the burn-off cleaning of them as suggested. Checked the gaps on each plug and found them at about .040, so adjusted them to about .025 each. Looked at the points gap and they looked pretty, so checked and adjusted to about .021 gap.
Checked the timing by checking the position of the #1 cylinder at TDC, (compression at the plug hole) with the double mark on the flywheeh at the timing pointer. Confirmed that the dist rotor was pointing to the #1 post (plug wire).
Put a little oil in each cylinder as suggested to let it soak for a while. Checked the compression of each cylinder, just to know how they were doing, and found them to be at about 75 psi each using the hand crank to test. Probably do higher than that if starter cranked, but didn't test for that.
Confirmed spark to ground from each dist post by inserting a wire into each plug wire one-at-a-time and starter cranking. We got a good 1/4" spark across the gap.
Ok, we've got spark to the plugs, (had that before) the timing looks to be right, we've got fuel to the carb....this gal's gotta start.
Put her all back together, plugs in, wires connected, fuel on, cranked her over.....NOTHING. Not a hint of trying to fire. Choked her, nothing again.
Ok, time to get that battery reversed like its supposed to be, so the (+) is connected to the chassis. Pulled the battery out of the box and rotated it 180 deg and wired it back up. Engaged the Starter, cranked it over....nothing! Lets try some Starter Fluid in the intake.....spray, spray, crank, crank, varooooom! She fired up and sputtered a bit and died. Spray and crank again...varoom and running, a little rough, but running! Started to smooth out, and warm up, but then died. Spray and crank, and she fired up again, ran about a minute, pretty smoothly, then died. Waited a minute, choked her a bit, and cranked her over and she ran. Again, for about a minute, pretty smoothly, and then seemed to starve for fuel. Choked and started again, noticed it seemed to be running RICH, some black smoke from exhaust pipe, ran about a minute then died.
Forgot to mention that the fuel is fresh new fuel, with 10% ethanol.
Noted a couple of things near the end of this process. Saw a vapor plume emitting from the small hole in the bottom of the carb intake port after the engine dies.
Noticed a small fuel drip from the Power adj screw at the bottom of the carb. which I stopped by snugging the brass fitting it goes into.
I had this carb apart last week to clean and inspect, but didn't really find anything obviously wrong there. I cleaned it, making sure all of the ports and pinholes were clean and clear, and I adjusted the float per a video instruction. Set to 1 and 7/8" from the flange where the 2 halves of the carb bolt together. I think this may be a mistake. I adjusted by about 1/4" or a little more.
Anyway, what are your thoughts of what's happening now??
Too low a fuel bowl level ?
Is there any way to prevent these carbs from running 'RICH' ?
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