I don't know specificlaly if the mountings, etc. will fit. But when I
was shopping for tractors and snow blowers, two separate salesmen told
me that anything under 18 HP or so isn't very useful for snowblowers.
They need a fair amount of power.

I'd ask someone at Sears whether they recommend fitting one to your
15.5 HP. They can also probably figure out if things will physically
fit.

--

Andrew Duane Member Technical Staff - ATG
SavaJe Technologies
100 Apollo Drive p: 978.256.6521 x 343
Chelmsford, MA 01824 f: 978.256.8386