Posted by Aus.Steve on January 01, 2016 at 22:16:52 from (58.168.28.206):
:? Hi, I'm new to group so not sure if this has been covered.
I am having trouble getting my TEA 20 to run properly.
It has the Zenith carby which according to the manual I downloaded should have the slow running mixture screw set at 1 to 1&1/4 full turn from closed and the main jet set at 1 to 2 full turns, depending on workload. These are the settings I have always used.
I recently had to strip the carby down due to impurities causing the needle and seat to stick open and flood the carby. As the gasket had deteriorated severely i had to form a silicon gasket. After this the tractor ran better than it ever has for several hours on different occasions in the several years I owned it.
However it recently started missing severly and blowing a lot of black smoke and the main jet can only be set at about 1/8 of a turn at idle before excessive smoking and stalling occurs and needs to be adjusted to 1/4 to 1/2 of a turn at high revs. any more and it runs rough.
I'm wondering if a breach has occurred in the gasket causing a cross over of fuel between the main and slow idle jets.
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