G question

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   Quick question:  I've got a thoroughly cleaned out carb and a newly sealed gas tank (no more clogged up carb) on my Allis G (48).  The tractor idles very nicely and can be throttled down low without stalling BUT only when the idle pin is at maximum richness (idle adjusting screw is all the way in... factory is one and a half turn out).  Even a half-turn will cause the tractor to weeze and the governor to kick in finally stalling out.  The only thing out of place as far as parts is a larger diameter fuel hose (3/8 instead of 1/4).  DO I have a problem I should fix or is it fine to have the carb set to maximum richness?  Also my exhaust is clean, not black.  Tractor drives great.
John

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John Kenny Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 06 Jan 2012 Location: Rhode Island Points: 56	Post Options Post Reply Quote John Kenny Report Post Thanks(0) Quote Reply Topic: G question Posted: 19 May 2012 at 3:47pm
	Quick question: I've got a thoroughly cleaned out carb and a newly sealed gas tank (no more clogged up carb) on my Allis G (48). The tractor idles very nicely and can be throttled down low without stalling BUT only when the idle pin is at maximum richness (idle adjusting screw is all the way in... factory is one and a half turn out). Even a half-turn will cause the tractor to weeze and the governor to kick in finally stalling out. The only thing out of place as far as parts is a larger diameter fuel hose (3/8 instead of 1/4). DO I have a problem I should fix or is it fine to have the carb set to maximum richness? Also my exhaust is clean, not black. Tractor drives great. John

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wbecker Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 29 Oct 2009 Location: STL Points: 837	Post Options Post Reply Quote wbecker Report Post Thanks(0) Quote Reply Posted: 19 May 2012 at 5:00pm
	If it runs good, and no black smoke, then you mixture is fine, all is well. Bill B
	Allis B, IB, Low B, G, D10, JD M, 8KCAB, C152

John Kenny Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 06 Jan 2012 Location: Rhode Island Points: 56	Post Options Post Reply Quote John Kenny Report Post Thanks(0) Quote Reply Posted: 19 May 2012 at 5:08pm
	Ahhhh....

Steve in NJ Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Andover, NJ Points: 11992	Post Options Post Reply Quote Steve in NJ Report Post Thanks(0) Quote Reply Posted: 20 May 2012 at 12:07am
	Sorry, but I don't agree wit' dat. If your air/fuel mix screw is cranked all the way in, its running dead lean. You should be able to adjust it out and fatten up the mix and dial the engine in without the engine stalling. You still have dirt in that carb yet or you have a problem on the enrichment side. Its getting fuel from somewhere if the air/fuel needle is bottomed out... Steve@B&B

Gordy Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: SWMI Points: 2533	Post Options Post Reply Quote Gordy Report Post Thanks(0) Quote Reply Posted: 20 May 2012 at 1:31am
	Sounds like you may have an intake leak i use a piece of hose or plastic tubing and put one end to your ear and move other end around carb and manifold gaskets to hear any intake leaks

John Kenny Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 06 Jan 2012 Location: Rhode Island Points: 56	Post Options Post Reply Quote John Kenny Report Post Thanks(0) Quote Reply Posted: 20 May 2012 at 5:16am
	Thanks for the reply From what I understand from the manual the fuel mixture with the pin threaded all the way in is very RICH, not lean... unless I misunderstand you. The intake leak idea seems possible, I will take a look. I will tell you this: Before I sealed the tank we cleaned out the carb and replaced some parts and then "bench tested" it with a false gas tank on the tractor with a 1/4 hose. Tractor ran great but needed to be leaned out. NOW I've got the real gas tank (all sealed) and a 3/8 hose on there and the pin has to be in for the mix to be right. Thanks again. John

Gerald J. Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Hamilton Co, IA Points: 5636	Post Options Post Reply Quote Gerald J. Report Post Thanks(0) Quote Reply Posted: 20 May 2012 at 10:24am
	The float level could be off, too much fuel in the float bowl, or the float needle could be not shutting off completely. Some idle screws are air, not fuel, so all the way screwed in is max fuel, min air. I suspect the carburetor passages aren't truly clean, especially the idle air passages. Gerald J.