Spitting gas out of this marvel schebler.

641Dave · Mar 20, 2012

It goes from running great to spitting gas out of the air intake and smoking real rich.

Any ideas?

elmersooner · Mar 20, 2012

sounds like the float is either sticking or needs a little adjustment--could also be the seat leaking--needs a little more tight applied--or the needle is out of whack--in order of probability --just a guess though.

Allan in NE · Mar 20, 2012

You mean that it is actually shoving raw gas out the intake?

Allan

Anonymous-0 · Mar 20, 2012

float could be rubbing the bowel.

641Dave · Mar 20, 2012

Let me check again. It spits gas out onto the starter. I just put a new float in it thinking the same thing. The old one seemed kinda collapsed or dented in.

Earlier it had bouts of running great, but as I let her idle, she'd go back to sounding like a Johnny popper and spitting gas and smoking.

Trying to get that float a 1/4" off the gasket but maybe I ought to sink it a little deeper in the bowl?

teddy52food · Mar 20, 2012

Intake valve is leaking. Do a compression test.

rrlund · Mar 20, 2012

Thought that was my problem today. No such luck. Loading manure yesterday,the float stuck on the 1020 Deere a couple of times. I whacked it with a pair of fencing pliers and straightened it out every time. Stopped at noon today to eat dinner. Went back out and something was running down the side of the engine. Thought GREAT,float's stuck,it's sitting in the barn,the way my luck's been going,I'll catch it on fire and burn the barn down. Nope,wasn't gas. Antifreeze. Not a bypass hose like I'd hoped. Blown head gasket. Just what I needed. Sure raised the spirits. And yes,that's sarcasm.

PopinJohn · Mar 20, 2012

Sounds like sediment/water coming through the line from the gas
tank is causing float valve problems.

CHUCK CAMBIS · Mar 20, 2012

like the man said, if its spitting, check valve settings and a compression check...........

Jerry/MT · Mar 21, 2012

Check the float setting. Your float may be "hanging" due to a worn pin.

Anonymous-0 · Mar 21, 2012

Spiting gas makes me think sticking or warped intake valve.A float with gas inside will do this.

Allan in NE · Mar 21, 2012

Dave,

If it's "spitting" out the intake, the carb just plain isn't your issue.

Sure sounds like a tight valve guide, broken valve spring, rocker, flat cam, etc., etc.

The only way the air flow can reverse is if it has pressure from somewhere. (Read: compression coming backwards out thru an intake valve for whatever the reason).

Allan

641Dave · Mar 21, 2012

I'll get a compression check and get back with you guys on what's going on.

Once again, thanks fellas!

BCnT · Mar 21, 2012

did you blast your carb bowl? i had a similar problem on my '62 2000...bowl looked clean but had a lining of scale that float would hang on...i sandblasted the whole carb and problem was solved.

641Dave · Mar 21, 2012

I used my dremel tool with the wire wheel on the bowl and have it shining, but I did notice the hinges that hold the float pin where a little bent. It has me wondering now if they are binding or letting the float slide to far either way.

I'll get it sorted out.

By the way, I found that compressed air and old bronze wound guitar strings works well in cleaning the carb orifices.

641Dave · Mar 21, 2012

123-0-0-125

All spark plugs were black and sooty, one of the cylinders with no compression was oily.

Now what???

Valve job or complete rebuild?

Spitting gas out of this marvel schebler.

641Dave

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elmersooner

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Allan in NE

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Anonymous-0

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641Dave

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teddy52food

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rrlund

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PopinJohn

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CHUCK CAMBIS

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Jerry/MT

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Anonymous-0

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Allan in NE

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641Dave

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BCnT

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641Dave

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641Dave

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