Posted by TX656 on February 14, 2009 at 12:07:02 from (71.48.164.220):
Had to switch to the little tractor last week because the 656 kept losing power after pulling about 150 yards. Turn it off, wait 30 seconds, fire it right back up same thing. I was guessing plugged fuel filter or tank filter or carb filter (but I'd also read on the board that the D21's can be too hot and cause piston swelling so I bought some 18's to put in.)
So this is what I found when I pulled the plugs, doesn't look promising but I'm a parts swapper and not a true mechanic so hoping some of you guys can give me some clues on what you'd tackle next.
The compression test looked much better than what I remember from last time but given how the plugs look I'd say it is because there is so much oil in the rings it's the equivalent of a wet compression test even without squirting in any oil.
#1, #2, and #3 left an oil patch where I layed them on the concrete.
#4, #5, and #6 were 'dry'?
Oil pressure after warm shows to be about 22.
If she needs a top end I have to start now to beat hay season. Thanks for help.
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