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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Compression Jet settings for Marvel Shebler Carb

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George

10-22-2003 17:28:28




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Anybody offhand know the main and idle jet settings on the Marvel Shevler(Sp?) carb on a Continental Z-134 engine, in this case in a MF 202 UTility...same as T 35 gas....and T 135, I think...thanks...

Just checked the comp on this new tractor...135 +/- 2 lbs on all four. Is this close to usual for the engine?




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TO35

10-22-2003 17:56:36




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 Re: Compression Jet settings for Marvel Shebler in reply to George, 10-22-2003 17:28:28  
George....thats good compression rule of thumb is anything over 60 psi will run anything over 100psi normal...135 is great.
adjustments for your carb. are 1/4 inch on the float level.
turn both adjustment screws in till lightly seated and them back them out 1 turn each.
Then on the idle adj.(with eng. at opperating temp and choke open) turn out till it runs smothly.
Power adj. eng. running at governed speed turn needle clockwise untill eng. begins to loose power and then back out till it picks up power and runs smoothly ( a richer mixture may be needed to improve acceleration --- if it does not accel. corectly turn needle out till it does)
Think caution !!! get some one to help you by sitting in the seat while you do the adjustments &
Becareful...


best wishes
TO

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George

10-22-2003 20:00:37




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 Re: Re: Compression Jet settings for Marvel Sheb in reply to TO35, 10-22-2003 17:56:36  
TO,

Thanks for the reply...exactly what I needed to know. I hope that good compression is accurate. The engine was warm, I use a screw-in guage, and I let the cylinders "hit" eight times, or to max compression, but I was surprised, had no idea the compression would be that hi...I would suspect carbon build-up, but the readings were extremely consistent/..

Thanks again for the help, I'll jump on it again in the am....

George

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