If you look in the parts manual you will see a different adjusting screw and main jet for fire crater pistons. It has a different taper, length and the main jet it larger but I can't remember if it is longer or shorter than original. It is also calibrated for full load horsepower at five turns out so it is way clear of the jet for zero restriction. Actually most are clear at about 3 l/2 turns out after bottoming. Can't tell by looking at carb what parts are inside of them even though there was no updating of the number on the carburetor.
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Today's Featured Article - Pitfalls of Tractor Engine Rebuilds - by Chris Pratt. The first pop after you have put the machine together with your own hands is exciting and pleasing. The whole experience can be marred if one moves too fast and makes too many assumptions that they can just use "as is" some parts they should be closely scrutinizing and possibly attended to. In such cases, rework makes what could have been a fun project turn into an irritant or even a nightmare. Minor Irritants To give you an example of an minor but irritating proble
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