Posted by Charles Addison on July 11, 2010 at 09:20:15 from (208.104.36.74):
My 300 lost power in 2000. The compression was 85.90 #. I put in rings and the compression was still the same. Then i put in new sleeves, pistons main bearings etc. and still I had only 85-90 #. From the internet I learned the compression was supposed to be 6.6:1 ratio or 140 #. People thee me that the rings are not seeted. They were put in in 2004 and have 230 hours on them. I have another 300 that was running at one time and the compression on it was 130/140 #. I took the head off it and put it on the tractor and I still get 90 #. I adjust the valves to .017 as the book says. I bring no. 1 piston up on the compression stroke and put the pointer on the top dead center mark. Then I turn the engine 1/2 revolution and adjust no. 3 cyl. valves. Another 1/2 rev. and adjust the valves for no. 4 cyl. etc. If the timing jumped one tooth --would the engine even run?/
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