Hi everyone,
I been running my 56 640 for 10 years, mowing and plowing snow. But in the past two years I have found cylinder #4 buggers up the spark plug with oil every 6-8 months, causing it to not fire in that cylinder. So I did a compression test, dry and wet. Here are the results:
Dry (not warmed engine, gas and ignition off, throttle completely open): 107, 107, 93, and 103.
Wet (warmed engine, small squirt of oil in cylinder, gas and ignition off, throttle completely open): 120, 120, 120, and 115.
What do you think? tractor has no other issues, no major leaks. Should I rebuild motor? If so, should I do an in-frame rebuild?
Thanks!
Chad
I been running my 56 640 for 10 years, mowing and plowing snow. But in the past two years I have found cylinder #4 buggers up the spark plug with oil every 6-8 months, causing it to not fire in that cylinder. So I did a compression test, dry and wet. Here are the results:
Dry (not warmed engine, gas and ignition off, throttle completely open): 107, 107, 93, and 103.
Wet (warmed engine, small squirt of oil in cylinder, gas and ignition off, throttle completely open): 120, 120, 120, and 115.
What do you think? tractor has no other issues, no major leaks. Should I rebuild motor? If so, should I do an in-frame rebuild?
Thanks!
Chad