FarmallH

[Al in Mn]

I have an H that when it has not run for a week or so runs on 3 cylinders for about 10 minutes and the runs on all 4. There is no water in the
crankcase. Could it be a sticky valve?
 

[Wayne in MN]

Bad spark plug? Which cylinder is affected? Is it a different cylinder or always the same one?
Where are you located? I am in Fergus Falls,MN.
 

[Al in Mn]

I did not think about checking if it was the same cylinder every time. Thanks I am at Mt. Lake
 

[David G]

You should be able to hear a sticky valve as an uneven speed when you crank it. It will speed up when the weak cylinder comes up.

I would expect a spark plug is fouled, does it smoke at startup?
 

[gene bender]

Pull all plugs lay them in order and compare maybe just need a new set.
 

[merlynr]

pull one wire at a time with it running and listen for no change in rpm. I had a plug that would fire if I held the wire slightly away from plug and not when connected.
 

[wisbaker]

My mother-in-law was raised in Mountain Lake, her dad was the John Deere Dealer and former Mayor.