Posted by docmirror on April 24, 2019 at 09:35:59 from (107.213.165.255):
In Reply to: Carburetor Flooding posted by Mnethercutt on April 22, 2019 at 10:56:14:
You have actual fuel running out of the carb inlet, and you are worried about spark?
Uh - no. There is a problem with the needle seating into the base seat and shutting off flow from the tank.
Old gave you all you need to know. My steps are similar.
1. Remove carb from tractor.
2. Turn upside down.
3. Blow hard into the fuel inlet.(you can't generate enough air pressure to lift the float needle off the seat).
4. If you have ANY air flow from blowing in it, the float is not closing the needle on the seat!
The little tab that holds the needle to the float pivot may be mis-adjusted. If so, the float will be at the top of its articulation, and the needle will not be closing against the seat. There is a spec for the distance from the top of the float, to the upper base of the carb. Measure this when the carb is upside down, and if it is wrong, set the tab correctly.
This is a Zenith carb, but the process is the same. You need the spec for the distance from the float to the flange.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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