Posted by Bob on August 07, 2013 at 21:53:55 from (64.255.159.192):
In Reply to: Ford 300 6 cyl flooding posted by Wesley Stephens on August 07, 2013 at 16:35:17:
FRANKINFLORIDA has it ALMOST figured out, "cept he"s a little over dramatic with his "vibrating at idle" theory.
Actually, one side of the accelerator pump diaphragm in the YFA is exposed to manifold vacuum, and, in addition to being the accelerator pump, it operates the metering rod, in effect the power valve.
The diaphragm gets to leaking, providing a path from the bottom of the float bowl to the intake manifold, which, needless to say causes wasted gasoline, rough idle, and flooding.
This is a known COMMON problem for as long as the YFA has been on the market.
For this illustration, the gasoline is GREEN, and it IS staying on the float bowl side of the diaphragm!
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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