Freightrain

1000-1200# or so.
I know my folding engine crane would just pick it up with the boom all the way in.  I unloaded my 237 from a small trailer with it.

Depends if it is a baby quad?  If it was an original gasser it likely is the small quad.  Not something you want to put much torque through.
Look on drivers side of the main box and find the milled flat spot.  It will have numbers stamped in it.
 
I don't know the numbers for a small quad, but the large one would be like "TRQ 7220".   The "q" is for quad.  If it is TRT, its "t" for triplex.  TRD is "d" for duplex.  The numbers denote ratios and how many OD it is.  "722" would be single OD.  "7220". The "0" means double OD . 
Just some basic information for you.  There was a listing posted on here that laid out all the trans codes and ratios.  I printed it off 20 yrs ago.

Yup, when I had my original 673 pump rebuilt they told me that was included.

"Missed it by THAT much"..............

I put strings all around my drivers side, after the fact. Mine started leaking after I put new glass/rubber in. I pulled the lock strip out a couple winters ago, put caulk strips around outside and put lock strip back in. Seems dry. Mine does have some rusty issues and the edge is not smooth/flat anymore. Better to put it all around and not need it then find out it leaks.