I double that c note bet. The timing might change but not more that the +/- 2 degrees that is called out for at w.o.t and idle. Take up T.D for his used one. I have one also if his does not work out. Part number for the puller is 91-73687a1, order one from Mercury part express and they will ship it to the house. I would also check out why the teeth were ground off. Is the starter sticking?
What part of Yuma?
I spent a little time there. Wearing green and fixing aircraft.
Looks like the number has been superceded, http://www.mercurypartsexpress.com/P...has+been+subst ituted+with%3A+849154T+1&CID=168150186061226063269
For the price of the tool, your local shop should be able to pop yours off and you can install the new/used one. Hope it works out. Gary