I always use a breaker bar with the puller. The harder it's stuck, the slower I go. Quality of the pullers varies greatly. That's one reason I started making them years ago. I also use grease on the end of the puller and the threads.
A couple of other things to pay attention to: watch for the small thrust washers on the starter gears. Keep the idler shaft (the shaft the lever/doo fits onto) pressed into the engine cases as you remove the inner generator cover. That's the inner cover that gets removed to get to the old spring. Keepng the shaft pressed in prevents the thrust washer behind the dler sprocket from dropping. You don't want to unknowingly drop the washer. If you drop, it's pretty easy to put back into place. Just don't drop it and not know it.
Be sure to put the gasket where it should be. I know what sounds simple, but..... Sometimes people tackle stuff like this with zero or little wrenching experience.
all the best,
Last edited by eaglemike1; 02-13-2009 at 10:25 AM.