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China carb

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tomstractor
5+ Years
5+ Years
Posts: 129
Joined: Mon Sep 04, 2017 11:12 am
Zip Code: 01007
Tractors Owned: 49 Cub,57Cub, 57 Low Boy, 48 BN, 48 Ford8N, 49Ford 8N, 56 Massey Harris 50, 58 MF 65, 77 MF 265
Circle of Safety: Y
Location: Belchertown, MA

China carb

Postby tomstractor » Sun Jun 28, 2020 4:40 pm

Bought 1 of the after market carbs, $50. The tractor seems to run very good but after a hour or so it started to skip. Puled the plugs and
found that the are all black and fouled. It seems to be running rich. I had set the float before installing it. Is it possible that the main jets are too big? Can they be replaced with original jets?
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Bob McCarty
Team Cub
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Joined: Tue May 25, 2004 8:02 pm
Zip Code: 80501
Tractors Owned: Cubs, MH Pony, Shaw, Allis G, 1934 Silver King, JD LA and LI, Gibson D, David Bradley Tri-Trac
Circle of Safety: Y
Location: CO, Longmont

Re: China carb

Postby Bob McCarty » Sun Jun 28, 2020 5:13 pm

Threads are the same, but the hex head is larger (possibly metric but I didn't check). I measured the main jets in two and both are 0.041 - 0.042".
"We don't need to think more,
we need to think differently."
-Albert Einstein
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Frozenstate
5+ Years
5+ Years
Posts: 205
Joined: Sat Sep 09, 2017 6:20 am
Zip Code: 14414
Tractors Owned: F- CUB Fast hitch 1955 #191991J
Snow plow
Super Chief moldboard plow
Spring tooth harrow
Disc
York rake
Carry all
Fast hitch Mott flail mower

Ferris IS 100 61" zero turn

Re: China carb

Postby Frozenstate » Mon Jun 29, 2020 6:18 am

If the jets are too big you can solder them closed and drill them to the correct size.
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Gary Dotson
Team Cub Mentor
Team Cub Mentor
Posts: 5643
Joined: Thu Aug 03, 2006 6:20 am
Zip Code: 43358
Tractors Owned: 48 Cub Diesel (Cubota)
53 Cockshutt 20 restored (Shooter)
52 Cockshutt 20 unrestored
47 Leader "B" (Herckie)
49 Leader "D" (Princess)
49 Leader "D" very rough
48 Leader "D" unrestored
Kubota B6200E
Kubota B6200HST
Kubota B8200HST-D
Circle of Safety: Y
Location: OH West Mansfield

Re: China carb

Postby Gary Dotson » Mon Jun 29, 2020 6:30 am

That's a little trick I haven't thought about for quite some time. I used to solder them, once in a while, but the purists frowned on it. It worked in a pinch!
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Don McCombs
Team Cub Mentor
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Posts: 17489
Joined: Mon Feb 03, 2003 6:45 am
Zip Code: 21550
Tractors Owned: "1950 Something" Farmall Cub
1957 Farmall Cub w/FH
1977 International Cub w/FH
1978 International Cub
1948 Farmall Super A
Circle of Safety: Y
Location: MD, Deep Creek Lake

Re: China carb

Postby Don McCombs » Mon Jun 29, 2020 7:38 am

An .034 jet is available from McDonald Carb & Ignition for $6.50 plus shipping.
Don McCombs
MD, Deep Creek Lake

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Proud Member of Maryland Chapter 39

The best teachers are those who show you where to look, but don't tell you what to see.
A. K. Trenfor
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