Posted by RustyW on June 12, 2008 at 20:08:04 from (70.59.102.111):
Hi,
My dads 54-ish Oliver Super 77 I6. The carb is a Zenith 12522 replacement. The tractor has been in regular use discing riding arenas and whatnot for the last 15 years. Was going to use it to level my lot and it ran well for about 3 hours then started flooding. Thought it was dirty needle and seat and put a paper filter and new line from the filter to carb and tried cleaning up the needle when the rubber tip popped off so I bought a kit.
It doesn"t run/drip/err just sitting w/ the fuel on. If you try to start it it will spit and sputter then die and fuel starts dripping out the drain under the choke plate and keeps dripping till the fuel is shut off. The fuel seems to be coming out of the main nozzle but might be coming out of the well vent jet.
All gallerys squeaky clean. I"ve put a new needle/seat, new gasket on the main nozzle, made sure the main jet was tight. The kit I got didn"t come with a gasket that fit the main jet. Adjusted main needle per specs at 2 turns out. The bowl will hold fuel and not leak. I put a glass under it, turned the fuel on, and it fills up to about 3/4" from the top then stops. The floats are only riding about 1/8" up in the gas. I tried setting the floats at 1 5/32 with the float bottom level w/ the mounting surface. That didn"t fix it so I raised them "a bit" but then realized the float bottoms weren"t level. Not sure how important that is.
I rebuilt a Carter Thermoquad on a IHC Scout a few weeks ago and it runs like a top so I"m very, uh, frustrated, that I can"t get about the simplest carb in the world working.
Any thoughts? Seems like the side clearance between the floats and bowl is tight. Floats hanging in the bowl? I thought I"d try setting the floats at the level they are now but even w/ the mounting surface.
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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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