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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Glowing Manifold

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Charles Story

02-26-2007 10:18:31




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I recently noticed that my manifold and a few inches of exaust pipe where glowing red. Tractor spits and sputters, and was reving to high RPM's. I also noticed the carburator which did have a small leak had stopped leaking. I read where the carburator being out of adjustment is most likely causing this problem of overheating of manifold. Temprature guage stays in cool area, so tractor not running hot. All help appreciated

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Jerry/MT

02-26-2007 17:29:07




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 Re: Glowing Manifold in reply to Charles Story, 02-26-2007 10:18:31  
Your mixture my be to lean or your spark to late or both. You don't want to run a Continental too lean because they depend on richer mixture for charge cooling and lean mixtures will burn the exhaust valves. The usual settting for the M-S carb is 1-1/8 to 1-1/4 turns open for the power jet screw and no less than 1 turn open.



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T May

02-26-2007 16:33:42




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 Re: Glowing Manifold in reply to Charles Story, 02-26-2007 10:18:31  
We have a 135 Massey that has the perkins 3 cyliner gas. At night when were plowing it would get red at the manifold. This is when it was new. Never seemed to hurt it. We still have it even though it does not do much more than pull a hay rake these days. stay safe



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Gerald J.

02-26-2007 10:56:51




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 Re: Glowing Manifold in reply to Charles Story, 02-26-2007 10:18:31  
Running lean makes the exhaust hot. Aircraft engines are routinely leaned by watching the exhaust temperature. The fuel efficiency is highest when the exhaust temperature is highest, so long as the exhaust valves and manifold can handle it.

The Continental engine puts out more power (as do aircraft engines) when running rich with a cool exhaust.

Check for manifold leaks to lean the mixture and for governor or governor linkages causing the high speed running.

Gerald J.

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Charles Story

02-26-2007 14:12:49




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 Re: Glowing Manifold in reply to Gerald J., 02-26-2007 10:56:51  
I removed carburator and discoved the float spring which attaches to needle valve was in bottom of carb. bowl. I plan on having carb. rebuilt.



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Charles Story

02-26-2007 10:21:04




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 MF 135 in reply to Charles Story, 02-26-2007 10:18:31  
The tractor I am asking about is a MF 135 with 4 cylinder continental gas engine.



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