Identify this engine?

[BurningDaylight]

This is the engine on my Cal 29. I was told the original atomic 4 was replaced with this, was told it was a yanmar. I couldn't see any plates or markings on it, but I could try to check further in the next day or so if someone can give me an idea where to check. Also, it appears something should be connected to the flange in the first pic, anyone know if it should have something there or not? Also, can anyone id this engine? I had a guy look at it, wouldn't really tell me anything about it, other then he said it looks like it needs to be rebuilt. Working on having someone else come look before I add an outboard. Thanks!

[SkiprJohn]

I'm not a Yanmar expert but it does appear to be one. My only hint is that it has the hand crank feature much similar to a Yanmar. Somewhere on that block there must be some type of stamp or plate with information. There is some print on something black behind and under the alternater pulley. It is, of course, a two cylinder and it has a missing air cleaner for some reason.

Have you tried cranking it over by hand to see if it cycles through a rotation? If it does then that's a good sign but don't keep cycling until you do a few more things. Ask here.

Look up cold start Yanmar on you tube to see if that's a similar engine.

[europaflyer]

Yanmar 2QM20 seems a likely candidate. Produced between 1975 and 1980. (without sounding too unkind I hope, that took about two minutes of Googling... )

Probably not beyond hope, if it turns over.

[SkiprJohn]

Originally Posted by europaflyer

Yanmar 2QM20 seems a likely candidate. Produced between 1975 and 1980. (without sounding too unkind I hope, that took about two minutes of Googling... )

Probably not beyond hope, if it turns over.

That certainly looks like it. I just called up Yanmar 2QM20 photos and the first one there looks identical.

You're a good googler.

[sanibel sailor]

Black printed thing is oil filter.
Looks like you are missing the chain fr the sprocket at the bottom right, probably not a good sign that it was last left in running condition.

[Crew of Turning]

It looks like my very own 2qm20 circa 1977/78, there is usually a plate on the block under the air intake and injectors to confirm serial numbers. Totally reliable legacy engine if maintained.

[olaf hart]

Originally Posted by sanibel sailor

Black printed thing is oil filter.
Looks like you are missing the chain fr the sprocket at the bottom right, probably not a good sign that it was last left in running condition.

That bottom sprocket is for the chain on the hand start.
Not a big deal.
The top flange looks like the mounting for the air filter.
Good engine, worth the effort to get it sorted.

[BurningDaylight]

Thanks everyone. I tried to Google yanmar diesel, but it showed other engines, didn't know the model number. You guys are good!

I have someone coming next week to look at it, so we shall see. I'm hoping it can be saved. Thanks again for the replies.