Try adjusting the carb; open the load screw 1/2 - 1 turn & try again. Enclosed is a basic guide to carb adjustment on the H & M series carbs; the 350 may be different.
High-speed mixture screw set at 3 turns out, idle air screw set at 1 1/2 turns out. Start the engine & warm it up in NEUTRAL and BRAKES LOCKED. Run at WOT (wide open throttle) and turn the high-speed adjusting screw in & out to find the "sweet spot" where the engine runs its fastest & smoothest. Turn this high-speed screw out an extra 1/2--3/4 turn for power. Idle the engine down & set the idle rpm's. Now turn the idle air screw in to richen, out to lean so the idle is smoothest (this is an AIR adjusting screw so works opposite of the main fuel screw on the bottom of the carb). Re-adjust the idle rpm's. Repeat the carb adjusting procedure another time to be sure all mixtures are correct.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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