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I have a Briggs & Stratton 5HP Engine (Horizontal shaft) And it has the diaphragm carb on it. The last person to own it messed with the carb adjustments and it'll have trouble starting and idling sometimes. I was wondering how to adjust the screw on this type. For example, do I turn it out like 2 1/2 turns and adjust from there or what? I can't find repair info in my manuals for some reason. I've adjusted hundreds of carbs but just don't know it's specs. the model number is 135212 and the type number is 0140 01 code number is 93031127. it's mounted on a MTD chipper. And also the carb might need rebuilt which is why the person was attempting to adjust. I just want to get it all right before I tinker with it.

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2 turns out should get ya started adjust from there. If adjusting doesn't help you may need a new diaphragm. While you have diaphragm out blow through the 2 holes you'll see under diaphragm with air to hopefully avoid pulling carb off to clear screens on pick up tubes. Also check carb mounting screws through carb into tank. They frequently come loose on chippers and log splitters because of hard mount.

Posted on Oct 07, 2010

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