When you first suspect you have fuel issue, perform the Fuel Flow Test with a cold engine. Remove drain plug, open valve, flow should be steady at 1 pint in 2 minutes.
If test fails, begin the usual possible root cause problem solving methods. The 3 filters are the first and easiest to check. The Fuel Inlet Brass Elbow is often
neglected. It has a built-in mesh filter attached. The brass elbow has a NPT male fitting that inserts into the carb body and the female port is a special 7/16-24 UNS
which the fuel line fitting inserts into. 90% clean doesn't mean anything to me. Is the Float level set at 9/32? Did you replace the needle valve and seat? So
cleaning can mean a hundred things. Do you have the OEM Marvel-Schebler carb or a cheaply made clone? If carb passes fuel test, leave it alone and move on. Electrical?
6V or 12V? A plugged fuel flow issue can be attributed to one or more issues, a plugged tank vent often a biggie. M/S ID tag was at first cast in the bottom half on
the boss as shown. Later, 48, revamped to riveted brass date code ID tag with the TSX model number as shown. The date stamp only defines when the unit was built at the
Borg-Warner plant. Aftermarket carbs do not have this ID tag. ALL TISCO part kits are good now for all N Series carbs.
FORD TRACTOR CARBURETOR:
NEWER STYLE NEEDLE VALVE & FLOAT; GAGE HEIGHT SET AT 9/32:
FORD N-SERIES TRACTOR FUEL SEDIMENT BULB FILTERS:
MARVEL-SCHEBLER CARBURETOR MODEL NUMBER & DATE CODE ID TAG:
-EARLY TSX-33 AS CAST RECESSED ON BOSS-
-LATER TSX-241-B & DATE CODE 4-51 WITH RIVETED BRASS TAG-
Tim Daley(MI)