B Powerblock ?

1st off can anyone tell me what's the best spark plug for the 5-2 b-powerblock?
2nd what is clearance on the tappets?
I'm trying to get this tractor to run smooth
it wants lope along.
It has great power and starts good.
Any input would be great.
Thanks Scott
 

Well, you need to be more specific...!!
Early JD's don't run smooth anyway...

From what you say, it could be a touchy governor, to "just the nature of the brute"...!!

Tell us more...!!

Ron.
 
I never really had a "B" that didn't lope along at least just a little bit at low to mid throttle.
 
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