Page 1 of 1

YM2000 REBUILD 2 cylinder Rebuild 2TR20A

Posted: Thu Jul 04, 2019 8:52 am
by nothead14
After rebuilding,tractor was hard to crank.Adjusted valves every way possible. Tractor is blowing back through intake and smoking. Any ideas why? Thanks Ken

Re: YM2000 REBUILD 2 cylinder Rebuild 2TR20A

Posted: Thu Jul 04, 2019 10:53 am
by winston
Got .006" clearance on all valves? Did you have the head reworked? Have ;you used starting fluid?

Re: YM2000 REBUILD 2 cylinder Rebuild 2TR20A

Posted: Fri Jul 05, 2019 1:33 pm
by Aaron
What was wrong with the tractor before the rebuild?

Did you set the valves like this?
https://www.hoyetractor.com/valve-set.htm

It is not uncommon for those 2cyl Yanmars to puff back out the intake like that when they don't start. I have seen that many times. Once they fired up they all ran just fine.