How about this one

[Clasec]

Any ideas on this one? It is 2.25 diameter.                                                                           piston and rod by Clasec, on Flickr                                                                                                                                                                                                                                                                                                                                                                                                                                               piston and rod=1 by Clasec, on Flickr                                                                                                                                                                                                                                                                                                                                                                                                                              rod number by Clasec, on Flickr

[undee70ss]

Possibility a large generator or pump. Number on connecting rod is for the needle bearing I guess.

[Clasec]

Apr 4, 2019 2:03:15 GMT -5 undee70ss said:

Possibility a large generator or pump. Number on connecting rod is for the needle bearing I guess.

It measures the same diameter as a 2000 or 2100. Could that be a possibility?

[scotts2000]

Apr 4, 2019 10:13:46 GMT -5 Clasec said:

Apr 4, 2019 2:03:15 GMT -5 undee70ss said:

Possibility a large generator or pump. Number on connecting rod is for the needle bearing I guess.

It measures the same diameter as a 2000 or 2100. Could that be a possibility?

Yes ...send a picture of casting number inside piston..i have a nos one here i will.compare to when i am back in shop.
Scott

[Clasec]

Apr 4, 2019 23:21:22 GMT -5 scotts2000 said:

Apr 4, 2019 10:13:46 GMT -5 Clasec said:

It measures the same diameter as a 2000 or 2100. Could that be a possibility?

Yes ...send a picture of casting number inside piston..i have a nos one here i will.compare to when i am back in shop.
Scott

Scott, I removed the rod and there is no casting number. It has thrust washers and two roller bearings in the rod small end.The pin diameter is the same as a 1050 piston. Thanks. 

[scotts2000]

2100 piston

[Clasec]

Thanks for the pictures. Did those pistons come with thrust washers on the rod small end?

[scotts2000]

Pistons came as shown...have clips for pin

[undee70ss]

Apr 4, 2019 10:13:46 GMT -5 Clasec said:

Apr 4, 2019 2:03:15 GMT -5 undee70ss said:

Possibility a large generator or pump. Number on connecting rod is for the needle bearing I guess.

It measures the same diameter as a 2000 or 2100. Could that be a possibility?

2000’s used a L ring. (head land ring) Does your piston have ring locating pins?

[Clasec]

Apr 7, 2019 17:27:31 GMT -5 undee70ss said:

Apr 4, 2019 10:13:46 GMT -5 Clasec said:

It measures the same diameter as a 2000 or 2100. Could that be a possibility?

2000’s used a L ring. (head land ring) Does your piston have ring locating pins?

Yes. The orientation of the pins are in the center of the piston between the pin holes.In the first picture they are barely visible on the skirt thrust side.

[tjthechainsawmech]

I'd have to agree about it being a 2000 or 2100 special. I check the 900 series gear drives and they are all 2.31 lol

[Clasec]

Apr 7, 2019 17:27:31 GMT -5 undee70ss said:

Apr 4, 2019 10:13:46 GMT -5 Clasec said:

It measures the same diameter as a 2000 or 2100. Could that be a possibility?

2000’s used a L ring. (head land ring) Does your piston have ring locating pins?

Here are some other pictures of the piston.                                                                                                  piston -1 by Clasec, on Flickr                                                                                                                                                                                                                                                                                            piston-2 by Clasec, on Flickr                                                                                                                                                                                                                                                                                               piston-3 by Clasec, on Flickr