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Farmall & IHC Tractors Discussion Forum
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10-20 engine

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Bob And.

04-04-2005 18:32:50




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I"m restoring a "29 10-20 and am having trouble getting the engine to hit on all 4 cyls without having the choke half closed. I"ve cleaned the carburetor, made sure all the holes etc are open, raised the float to the maximum level without running over, but nothing seems to help. Compression is 70# on #1, 90# on the rest. Spark plugs are new. The engine misses on #2 & 3 cylinders with the choke open, but runs pretty good with it about half closed. Timing seems right. Adjusting the mixture on the carburetor doesn"t seem to change engine operation much. Valve lash is correct and valves don"t seem to be leaking. I"m running off an auxiliary gas tank so I know the gas line isn"t partially plugged. Anybody got any ideas? I"m pretty well stumped at this point.

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Nebraska Cowman

04-05-2005 04:10:33




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 Re: 10-20 engine in reply to Bob And., 04-04-2005 18:32:50  
If it is specific to 2&3 cylinder and improves with choke I'd suspect a vacume leak



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Redfan

04-05-2005 01:53:10




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 Re: 10-20 engine in reply to Bob And., 04-04-2005 18:32:50  
Just a couple of thoughts.
Maybe the head gasket isn't sealing up properly between 2&3,or the distributor plate in the end of the maggy is allowing leakage between 2 & 3 terminals.Regards, Redfan.



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JOSSETTE

04-04-2005 18:35:10




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 Re: 10-20 engine in reply to Bob And., 04-04-2005 18:32:50  
are you sure on the firing order?????



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