Posted by karl f on April 02, 2009 at 22:48:18 from (172.129.135.195):
I got the carb number off the carb that i was having trouble with the idle air screw being effective. it is 362173r91. It"s on our 400 gas. Could someone tell me more about that carb? what should have been done to it to make it a r92 as mentioned earlier (difference in r91 and 92)? should i bother with the upgrade if it has not been updated? what should the idle air screw look like? someone said the gas had a different taper from the older but more commonly found kerosene carb screws.
thanks in advance for the info. will be away over the weekend but will check back, and check email and eventually get back to tractor. i do plan on total disassembly and thorough cleaning, but want to get it right. Carb is mechanically like new, there has to be just one detail wrong--junk in a small port, wrong screw, or float/main jet relationship not stock are my guesses.
Rich idle and poor start were reason for dissasmbly first time. (found one side of float was 1/16th inch high, set both to 1-5/16 and governor was way out of sync!)
karl f ps to clarify from last time the only changes in idle quality are when creating a leak.
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