Ym1600 (can of worms)

bmaverick · Mar 29, 2025

California said:
I mis-spoke above. 2QM-20 marine diesel, is the marine equivalent of the 2TR-20 (YM2000) engine.

From an experienced person in a boating forum:

the QM is a derivative of the 2TR20 tractor engine as fitted to the YM2000 tractor.

Google shows several listed for sale in the boating world.

Another application of the basic engine was ThermoKing semitrailer reefer units, 40 years ago. That might be the cheapest source for a rebuildable core.

There is a 2QM15 and has hits for the 2TR15 and 2TR16 engines. Yanmar supports these engines even today.

Found the service manual for it here, all in English.
https://j30.us/files/2qm15_servicemanual.pdf

Here is the Parts Manual,

https://sbo.sailboatowners.com/downloads/sailboat__85476108.pdf

With the rear mounting flange removed, it 'could' mount to our YM tractors.

It would be nice to find an engine to repower keeping the YM1600 going via a marine diesel or a 2TR19 upgrading the YM1600 to a YM1900.

millard762 · Mar 30, 2025

If you can't find the "correct" motor, how much similarity is there in engine block dimensions between the 2TR13 class and 2TR16, 17, 18, 19?

bmaverick · Mar 30, 2025

millard762 said:
If you can't find the "correct" motor, how much similarity is there in engine block dimensions between the 2TR13 class and 2TR16, 17, 18, 19?

I had added the manuals a few posts back. The 2TR16 and 2TR19 are swapable.

The 2TR13 nor 2TR15 are too much work or will not swap in due to different bell housing interface differences.

gstrom99 · Mar 30, 2025

Rocks91 said:
i bought it from a guy who said he ran it out of fuel and couldnt get it to start. it came with a brushhog and 4 new briefcase weights. so, after priming it and still not getting it to fire i covered it in a wool blanket and set the heat gun on it (its like 25degrees in the shop). after that i was able to get it to cold start for literally only a couple revolutions before it made an atrocious squeal and dead stopped. i got it to do that a few times then figured i had bigger problems. thats when i dropped the pan and saw what my $1500 really got me. anyways, im just trying to make lemonade here.

How much do you "need" this tractor? The way I always look at the economics of fixing vs replacing something is: what would it cost to buy a new/similar one?

bmaverick · Mar 30, 2025

gstrom99 said:
How much do you "need" this tractor? The way I always look at the economics of fixing vs replacing something is: what would it cost to buy a new/similar one?

Exactly. One reason why we post replies of possible engine swaps or links to a new refurbished head with all the hardware too.

It is possible to find another YM1600 or YM1900 tractor. Then use the broken YM1600 as a spare parts machine. Indeed it is best to look over every single option before venturing out blindly to solve the problem.

The cost of full overhaul the engine or find a full replacement tractor is a strong choice to consider.

There are 4 FB Market Place YM1900 tractors listed across the USA right now.