Re: Merc 115 Flywheel removal
The flywheel puller threads into the flywheel. Don't try to use a hook type puller. It will only do damage. And don't take any bolts out of the flywheel except the one on the crankshaft.
Pullers are available on eBay. Most are homemade. The ones with fine thread push bolts are best, the coarse thread ones struggle. Don't worry about the engine lifting ring, you can always use a fine thread bolt and a piece of chain.
hope it helps
John