13A Questions

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Thanks Ed
I have 2 good ones, 2 50/50 ones and 2 stuffed ones. The only no’s I can find are 122N on the outside top of the crown. STD is also marked there and the arrow to locate them correctly. I have a spare eng here serial no 1H07321 which I’m reluctant to strip unless it’s compatible. I will be removing the pilot motor though as I believe these all interchange. Hope you are well

Thanks Col,
Leaning towards later style pistons as all the books I have show 3 comp 1 oil and 3 comp and 2 oil rings. I have been able to locate some 3 comp and 1 oil ring pistons (nos) but am getting a bit thrown off by the different rings. Don’t want to put it all back together and end up in trouble. Thanks for the info

Thanks Ed,
At this stage I think I will pull a piston out of the 1H eng and have a look. I can get everything else off the shelf for reasonable dollars. Was quoted a liner kit inc pistons and rings and when I pushed we found they were updated no’s that suited D8H/K. D342 id say, wasn’t sure if they would compare so I gave them a miss, a bit pricey for a toy tractor to. Thanks again

Mark .
The piston in your photo looks the same as what is in my 17A. IE; 3 rings with the relief for the valves and the steel plug in the top of the piston. my 17A is non turbo .
I also have a dismantled turbo 17A engine here and it has more rings per piston . These engines have flush valves in the heads . That is why the relief cuts in the top of the pistons . This dismantled engine being a turbo engine I suspect will not be the correct piston for you.
Your 1H engine should have recessed valves and will not have the valve relief in the pistons . If you were to use the 1H pistons you would have to use the 1H heads .
I will try to remember to take some photos tomorrow and post them on here .
Your neighbour with the sawmill has a dismantled 17A there . It would be interesting to have a look and see if those pistons are the same.
I also know of a used set of 17A pistons and sleeves sitting on a shelf near here . I dont know if they are available or not.
Andrew Kennedy.

Here is a photo of a 6 ring 1H piston beside a 4 ring 17A turbo piston.
Also a early 2U head with recessed valves and saddle type injectors.
And a turbo 17A head with flush valves from the same engine as the piston pictured..