K161 Piston Size
 

:Unknown:took apart my k161 today , and trying to determine what bore it is. there is no marking on the top of the piston so i am assuming it is a standard bore. it also has a number in the inside 230002. the connecting rod number is 230519, if any one knows what they are or where i could search for them please let me know. the cylinder head number i found and it is a stock head. but not sure about the others.

Google:garden tractor pulling tips


Engine K141 (6¼hp) K161 (7hp) K181 (8hp) K241 (10hp) K301 (12hp) K321 (14hp) K341 (16hp) K361 (18hp OHV)
Bore 2.785" 2.938" 2.938" 3.250" 3.375" 3.500" 3.750" 3.750"
Stroke 2.500" 2.500" 2.750" 2.875" 3.250" 3.250" 3.250" 3.250"
Valve Sizes 1-3/8" int.
1-1/8" exh. 1-3/8" int.
1-1/8" exh. 1-3/8" int.
1-1/8" exh. 1-3/8" int.
1-1/8" exh. 1-3/8" int.
1-1/8" exh. 1-3/8" int.
1-1/8" exh. (early)
1-3/8" exh. (late) 1-3/8" int.
1-3/8" exh. 1-7/16" int.
1-13/32" exh.

I tried to copy the chart, best to go to web site.

As found in our Technical Library Section............... Service Manual