Posted by Tom Fleming on March 09, 2010 at 03:39:48 from (67.20.229.132):
In Reply to: F-12 hard to start posted by farmerphil on March 08, 2010 at 14:15:37:
F-12's can be notorious for hard starting if they sit for periods of time between runs. It has to do with the fuel supply configuration, fuel pump, carb bowl boiling dry when not running, etc. Hand cranking speed does not actuate the fuel pump diaphram fast enough to fill the carb bowl unless you crank and crank and crank.
I have found that the most common reason for a hard start on a correctly tuned F12 is lack of fuel in the supply system (lines and carb). If the tractor has been sitting for awhile, I always prime the carb with a bit of gasoline. It only has to run for a little bit for the fuel pump to fill the carb bowl......plus F-12/F-14 carbs are VERY finicky.
Try priming to see if your problem goes away before doing anything else. Take the air cleaner hose off temporarily and either put a little gasoline into the carb, or hit it with a couple of shots of ether. If it fires right up, you have found your problem. BTW, I am not saying you don't have another issue, but this one is very easy to check out, and very simple to correct.
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