YM2000 200 PSI Compression No. 1 Piston

Foolster · May 25, 2015

I am trying to get a YM2000 running. It puffs white smoke. My local diesel shop did a compression test and reported the first piston as 200 PSI and the second as 400 PSI. I previously had them rebuild the injectors for me. The first injector showed no signs of having fired while the second clearly had carbon from firing. What should I do next? I would like to get the tractor running fairly inexpensively to see how useful it is. Eventually I would like to rebuild the engine. Does it make sense to only rebuild the first piston? If the rings are bad may I drop the oil pan, pull the rod bearing, pull the piston, clean it, check the piston and cylinder for damage, if none then put new rings on the piston, carefully replace the rod bearings the same way they came out, and have a repair that could last a few years?

Foolster · May 25, 2015

A second thought. Has any one ever tried to upgrade a 2 cylinder Yanmar 2000 to a three cylinder engine?

winston1 · May 25, 2015

Note the paragraph under "spark". Going to need new rings at the very minimum. https://www.hoyetractor.com/trouble.htm

careyo63 · May 25, 2015

Foolster said:
A second thought. Has any one ever tried to upgrade a 2 cylinder Yanmar 2000 to a three cylinder engine?

The YM2001,2002,2010,2020 are 3 Cyl. 24Hp.

duanew1 · May 25, 2015

Foolster said:
A second thought. Has any one ever tried to upgrade a 2 cylinder Yanmar 2000 to a three cylinder engine?

It might be cheaper to buy a different tractor than to upgrade the engine. Besides, I have heard that the 3 cylinder engines do not have as much low end torque as the 2 cylinder ones. They are supposedly quieter though.

clemsonfor · May 25, 2015

Three cylinder is definitely way quieter than the two!!

Foolster · May 25, 2015

Another bit of information. When I bought the tractor the ground around it was littered with empty starter fluid cans. However the price I paid was so low that any work I put into the engine to make it run will still make it a good deal.

normde2001 · May 25, 2015

Foolster said:
A second thought. Has any one ever tried to upgrade a 2 cylinder Yanmar 2000 to a three cylinder engine?

You would spend $3000 turning your $3000 tractor into a $3000 tractor.

duanew1 · May 25, 2015

Foolster said:
Another bit of information. When I bought the tractor the ground around it was littered with empty starter fluid cans. However the price I paid was so low that any work I put into the engine to make it run will still make it a good deal.

Hmmm? You might need new pistons.

clemsonfor · May 26, 2015

duanew1 said:
Hmmm? You might need new pistons.

Foolster said:
Another bit of information. When I bought the tractor the ground around it was littered with empty starter fluid cans. However the price I paid was so low that any work I put into the engine to make it run will still make it a good deal.

And some head work?

Hopefully not like the other guy on here recently that needed a new oil pan as it blew it off useing starting fluid.