Can you engage and disengage the rear tines with a lever on the left side? That feature started around 1983.

12/1980 the XL engine was on Big Red Tillers. You can use Horse for Tiller parts engine pulley have bigger inside size for larger crankshaft sizes. The 8hp and 10hp engine made them Big reds. You need to run Depth Gage in third notch so save engine from over tilting and having dry cylinder no oil.

I have troy-built tiller econo horse
h60-75505p-ser73130
and was wondering if someone could tell me the age and any outher in fo on it

chuck

That info for engine not serial number of Tiller number should be on right top transmission housing 6 digit number.