Farmall Cub Forum -- Questions and answers to all of your Cub related issues.
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I've been working on one of my Cubs and have got a problem. The Cub starts fine and runs well at idle. Throttle up and it starts to die, pull out the choke 1/2 to 3/4 and it smooths out nicely and the RPMs increase. This happens with the air intake attached or removed from the carb.
Here is the list:
Replaced points, plugs, condenser
Installed new plug wires
Timed with timing light
Removed play in the governor linkage
Fuel tank is lined and clean
Sediment bowl is clean
No fuel filter in the line
Filter screen is clear in the carb
Rebuilt the carb
Excellent fuel flow when the plug is removed from the bottom of the carb
Excellent fuel flow out the hole holding the metering jet
Metering jet cleaned with copper wire and blown out
I believe my problem is fuel related. What am I missing?
Thanks for your help.
"The probability of life originating from accident is comparable to the probability of the unabridged dictionary resulting from an explosion in a printing shop." Edwin Conklin, biologist
Check the needle and cage.... hold the cage up to natural light. Probably a bit of varnish. Sounds like a fuel starvation issue and with all that you have done, really the cage is the only thing left....
Clean the carb again
IN GOD WE TRUST
All others pay cash
Power corrupts; absolute power corrupts absolutely byJohn Emerich Edward Dalberg
Float set properly?
MD, Deep Creek Lake
"1950 Something" Farmall Cub
1977 International Cub w/FH
1978 International Cub
1948 Farmall Super A
1951 Farmall Super C w/FH
I go with clean the jet again. Every time I have had a similar problem it was the jet.
"Life's tough.It's even tougher if you're stupid."
- John Wayne
" We hang petty thieves and appoint the great ones to public office."
Wear eye protection!!
Take the jet and a can of carb cleaner with the red tube attached.
Hold jet with finger covering one of the holes in the side of it.
Insert red tube into 2nd hole, and cover withe your thumb. (same hand, LOL )
Spray can, observing the shape of the spray exiting the jet. It should be "conical" and symetrical.
this has the same effect as blowing it out with air, plus it will flush out any impurities, and at the same time, allowing you to SEE what the spray patern looks like.
11 posts • Page 1 of 1
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