You can date the engine from the serial number.
Either go to the Kohler website and download the service manual, or post the serial number here and we can look it up.

I did some checking on mine and was told that the tiller was made in march 81 and the engine was made in Nov. or DEC. of 80. I was also told that the PTO was not used before 1982. I dont remember the numbers and I dont know if the info is correct. My tiller has a 7 hp Tecumseh engine.

If I can find a mfg date, and whether it's a horse I,II,or III, I can try and cross reference some part numbers. I need to get some new seals.

SN 677955 indicates it was built between January 1983 and July 1983.

thank-you everybody for the information. Now that I know the year, I can find some needed parts.

Hi. Have 2 Horse(I think) tillers'
#20691 &34054
Trying to find out what years they are.
Can anybody help?

#20691 = Jan 1971 started with serial #16108 and July 1971 started with #21840. 7,589 units were built during that period.

#34054 = Apr 1972 started serial #32140 and Jul 1972 started at serial #38000. Over 13K units made during this period.

Bar tread and cast iron hubs optional before #31040. 7âÂÂcast spoke wheel changed to 8â steel rims #31456.

Prior to 1976 the reverse disc was held on with 3 Allen head screws.

Thank you so much hippy
That was the most complete info I could have asked for
Wish I had your reference material
Thanks again

By the way hippy
Are they both Horse models
or Horse 1 or 11
Not really sure
Thanks again

Horse I's

Horse 2 began production around March 1978 with the 6 HP model at serial #314151 and ran to #639999. 7 HP began at #315296 and ran to 639999.

Thank you once again.
I really appreciate your info.
It answered many questions.