Main Jet Cleaning

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Main Jet Cleaning

Postby cub1947 » Tue Jul 06, 2004 8:47 am

After cleaning the entire fuel system and installing a filter , I still had a lean condition requiring slight choke to run well. Found that a #66 drill is the proper size to clean the main jet. Used in a pin vise it met slight resistance that proved to be deposits not touched by carb spray,removed only crud-no brass. Now it runs like a champ. As a side note, a Kohler fuel filter from TSC works very well with the gravity system.

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Arizona Mike
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1947 Circle series Farmall Cub with Armstrong lift, belt pulley, 5"rims 6" tires, SN 563

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Postby Arizona Mike » Tue Jul 06, 2004 10:45 am


Wouldn't a a good soaking in carb cleaner do the same thing. Just wondering as I am experiencing a similar problem having to run with choke slighly open.

Could you provide any more info on the Kohler fuel filter?



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Joined: Mon Apr 07, 2003 3:43 pm

Main jet cleaning

Postby cub1947 » Tue Jul 06, 2004 12:40 pm

The stuff in the jet was hard and seemed impervious to solvent. The filter is for Kohler CV engined garden tractors that use gravity feed from a remote tank and was purchased from TSC. Looks like the plastic Fram but is made for gravity feed.

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Postby sardad2002 » Tue Jul 06, 2004 11:48 pm

i have found that any inline filter will work just fine as long as you install it in a vertical position

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