Here is what i do on all my H's.... 1st thing I like to clean the carb or rebuild if needed. make sure you got unrestricted fuel flow 5 min minium. When rejeting the carb run it at 1/4 turn more open past it's sweet spot. next i like to put a shorter spring on the govener to increase rpm's to around 2000. Never let it run at 2000 with no load, also even if its under load dont hold it there for extened periods of time. You might need to adjust the limit screw to allow for more rpm's. I do it so i can get a "jump" on hills or other operations thast need just a bit more oomph. Advance timing 5% past the sweet spot. If you go to far you might get pinging. I get 90 octaine gas in my barrel so it hasent been an issue for me. Take the valve cover off and reset the clearence to specs. i belive .20 cold or .18 warm. Also another trick that i like to do is draine the oil and change the filter, fill it up with your fav oil. run it a few hours and drain again and fill it up with 4 quarts oil and one quart duralube. check oil level and fill to top check valve. also check the points plugs plug wires to make sure it is not missing. mabey go to a warmer plug if you have some oil burning going on. by doing these changes I think it adds 2 or 3 hp. most gained by allowing more fuel and increased rpm's and advanced timimg. There are more things you can do if you wann pull the engine down and build it to 350 specs.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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