Ym1600 (can of worms)

[bmaverick]

I call "piffle" on the starting fluid diagnosis - though a motor that worn probably was a tad difficult to start...

I only called it due to these areas on the head with the pitting as known traits of using starting fluid. There are several over the years posted in our section with the same tell tailing stories.

 

[bmaverick]

Here is one of our prior posters mentioned in the past . . . The pitting damage gets severe.

These two are from Yanmar Marine diesel engines.

 

[bmaverick]

Even the Japan tractors with diesel engines made by Mitsubishi in the same era are prone to this too.

 

[bmaverick]

One of the Yanmar made JD650 with the 2T80 engine,

The main firing cylinder,

and the other cylinder looks just fine.

 

[bmaverick]

JD850 with Yanmar 3T80 engine,

 

[bmaverick]

The reconditioned used heads from All States look like this, he would have to send his in as a core.

 

[careyo63]

As a Kid I worked at a machine shop in the summer. That one seen it's better days! If it didn't get the crankshaft and the bearing caused that damage my guess it's rebuildable. Parts was my biggest concern but that's not a problem apparently? No reason for block damage I can tell. And wet sleeved!! Big plus there also..

 

[Rocks91]

Just guess, something to explore further:

I think YM1600 was an earlier version of YM1700/YM2000. And their US twins YM195/YM240.

YM2000 in particular, is common in the US. A lot were imported used. So anything in these series MIGHT be a bolt-up replacement engine. Or the source for a crankshaft, if the stroke is the same. But verify all this before spending any m

i was hoping someone on here knew from experience about their compatibility. i know the ym1600 is rare compared to all its siblings in the series. the starter that fits a 1600 also fits the 1700 and 2000. the ym1500 is smaller. i know this because i had to guess which of these my tractor used and guessed wrong. so maybe same starter might mean same bellhousing? a bigger motor you would think needs a bigger output shaft. the one in mines tiny.

 

[Rocks91]

Nice photo, Rocks91.
That is a great picture of an old engine. Might be about the best textbook example of a worn out engine that I've ever seen. A classic.
And you say it actually still ran? That's amazing... Even more amazing is that it still looks like it might be rebuildable - although it might not be worth the effort.
I call "piffle" on the starting fluid diagnosis - though a motor that worn probably was a tad difficult to start...

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.

 

[Rocks91]

As a Kid I worked at a machine shop in the summer. That one seen it's better days! If it didn't get the crankshaft and the bearing caused that damage my guess it's rebuildable. Parts was my biggest concern but that's not a problem apparently? No reason for block damage I can tell. And wet sleeved!! Big plus there also..

I only called it due to these areas on the head with the pitting as known traits of using starting fluid. There are several over the years posted in our section with the same tell tailing stories.

View attachment 3196505

that looks like cavitation damage. either that happened in the last 10th of its life when the motor started going out or the owner used ether instead of the decompression lever lol