Your mower needs to set up level laterally(left to right) and the front should be lower than the back by 1/2 - 1 inch. You only have a 25 horse engine and you didn't say how big a cutter you have. A five footer is about as big as you can go. If the grass is really tall, you'll have to cut in 2nd gear or take a smaller width of cut.
Now getting to the engine performance. Make sure that the aircleaner is not restricted. That will limit power by reducing the air flow. Make sure that your tractor is tuned up, i.e. FAT, BLUISH-WHITE SPARK, the color of lightning. Make sure that the timing is set correctly and the advance is working. Make sure the spark plugs are correctly gapped. Make sure the carb mixture (the large knob on the carb) is properly set. You may have to richen it up a bit because of the heavy load you're placing on the engine.
Make sure that the air side of the radiator is clean( blow it out with compressed air or the water from a hose when the engine cold) so you don't overheat. Make sure the rad is full of 50/50 antifreeze/water mix.
Finally, make sure you have an ORC on the PTO. You need that because the inertia of the rotary cutting assembly will drive the tractor forward even when you step on the clutch. its the nature of this type of pto/drive system.
Hope this helps.
This post was edited by Jerry/MT at 10:25:42 09/11/08.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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