Hi all. my father-in-law has a 4.5hp mercury model # 4109576 . somehow or another it locked up after sitting for a while. we pulled the engine off only to find that it was the gear unit that was locked. we were able to get it loose again but we couldn't figure out how to get the prop off. tried a puller , using penetrating oil & tapping th shaft with a rubber mallet but nothing worked. if anyone has any ideas it would be highly appreciated. thanks, ant
