No dots on new piston rings

[GL-AZ]

I'm getting ready to put new rings on my new pistons for my Yanmar 2610, 3T80 engine. I know you're supposed to put the ring on with the dot up, but there are no dots on any of the rings including the outer oil ring. The only thing I find is a slight groove cut into the outer diameter of #3 ring. Which way does that go? My Yanmar manual shows different shapes for each ring and orientation, but I don't see that either. I've put many a ring on gas engines and never ran across this in the past. Please help, I was hoping to get the rings on today and the pistons installed tomorrow.

 

[bmaverick]

I'm getting ready to put new rings on my new pistons for my Yanmar 2610, 3T80 engine. I know you're supposed to put the ring on with the dot up, but there are no dots on any of the rings including the outer oil ring. The only thing I find is a slight groove cut into the outer diameter of #3 ring. Which way does that go? My Yanmar manual shows different shapes for each ring and orientation, but I don't see that either. I've put many a ring on gas engines and never ran across this in the past. Please help, I was hoping to get the rings on today and the pistons installed tomorrow.

Are you able to reach out to the ring supplier or mfg?

And BTW, the Deere JD850 3T80 piston rings fit too.

AND as a very helpful guide, you can use the TM1192 service tech manual to put the engine back together. Free from the YTOG.