Just picked up my new # 122, changed the oil & tranny. Lubed all zerks & all it needs is a GOOD cleaning. The previous owner never cleaned it, he just blew the grass from the deck.
I was going to change the spark plug with new points but....... hey, I turn the key & in 1 or 2 cranks it run's sooooooooooo smooth. Why bother if it ain't broke?
Two people came buy to test ride it & admire it & my good friend told me to give it a GOOD CLEANING &
"DON'T TOUCH IT." 
I just may do that?
Nik,
Added a 3/8 extension for my oil drain & drips a drop or two, maybe got to put some Teflon tape to the new spout?