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Old 08-21-2020, 02:59 PM   #1
Herb Concord Ca
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Default Main Jet for Tillotson and Marvel Carburetors

I have repaired both of these carburetors. Most main jets and the ones that vendors sell have 3 holes on side of the jet. I have 2 jets with only 2 holes on the side.
Anyone have any ideas on the differences?
Thanks for your comments.
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Old 08-21-2020, 04:57 PM   #2
1930artdeco
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Default Re: Main Jet for Tillotson and Marvel Carburetors

What about hole diameter to compensate for losing a hole?


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Old 08-22-2020, 12:47 PM   #3
Patrick L.
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Default Re: Main Jet for Tillotson and Marvel Carburetors

I have some but haven't had time to dig them out and have a look. Plus when I'm out there I forget, rememberer isn't what it used to be.
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Old 08-29-2020, 08:50 AM   #4
Patrick L.
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Default Re: Main Jet for Tillotson and Marvel Carburetors

I looked at some of the carburetor parts yesterday. The 5 Tillotson mains I have are all 3 [ actually 4] holes. I can't say I've ever seen a 2 holer, maybe they are early ones.
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Old 08-29-2020, 09:52 PM   #5
Herb Concord Ca
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Default Re: Main Jet for Tillotson and Marvel Carburetors

Thanks Patrick for your reply. I have 9 main jets with 3 holes and 2 with 2 holes. I wasn't counting the hole near the bottom in the turned down area just above the threaded portion. I only use the 3 hole style main jet. I agree with you the 2 hole jets are earlier ones. Thanks again.
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Old 08-30-2020, 06:19 AM   #6
Patrick L.
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Default Re: Main Jet for Tillotson and Marvel Carburetors

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Not a problem, just had to remember to remember to do it.
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