Hi all.. 

Could someone please advise me on what would be the standard piston size for a D2 donkey engine, 3J prefix..

Thanks in advance..

 

Attached is the spec sheet from JP pistons that makes a replacement piston for the D2 pony motor.

Hi Team,
pony piston specs.
Cheers,
Eddie B.

Excellent info guys.....

Hi Neil,
yes the D17000 pony had a 3 3/4" bore x 4" stroke.
27 Hp at 3,000 rpm.
One time way back we had a D17000 in our area powering a big face shovel in a quarry and it had a 4 cylinder side valve Le-Roi pony that was belt driven to the starter pinion assembly--I believe this was an option.

We used to get the D17000 in each year to de-glaze it by running it under load on our dynomometer as it never worked hard enough to not slobber--we were just setting up our old 1918 build Heenan and Froude dyno--I got to set up the dyno. for its first runs and this was one of the first engines we did--man did it smoke out the neighborhood until it cleaned up and sounded just great to boot with two straight out exhaust pipes.

froudedyno.com/about-us/history

Cheers,
Eddie B.