Rivets: Man, I did it the hard way. Realizing that the pulley is in two parts, this technique you mentioned is the correct way and pretty much the only and logical way to do it. Thank you for setting my mind right, Sir. :)
I really don't understand what is all the fuss about design comments? The GCV series engine is very reliable for what it is designed for (Domestic use). Even if a person has moderate skills, maintenance can be performed easily and major repairs can be tackled. The GCV series wasn't designed for...
Somewhat reliable Shaft straightening devices cost (probably) $150 or higher. The cost of a replacement Crank Shaft (depending on the GCV engine) ranges from $25 to $60 (give or take a few cents). I will always oped for the Crank Shaft replacement. :)
Richie: Bent PTO repairs the likes of you are describing are rarely successful for the long term because if the PTO is off by the slightest that will put too much load on the Aluminum oil sump shaft area. The only reliable option is to replace the Crank Shaft.
The_Implication: Looks like the...
Ryopilot: I would rebuild it. It's similar to the two speed transmission that's on a HR214. I rebuilt mine and it's not that tough. I used Lucas 80W-90 gear oil. Just look up the parts/diagram on boats.net and buy all the seals. Make sure you measure all the original seals and don't throw them...