That's what I'm going to do once I get it in the vice, if my pipe wrench is big enough, I don't have any can left, just the base plate screwed onto the adapter, on bammarine's schematic, it looks like the threaded fitting has a nut, so I just might just unscrew the fitting out of the adapter. I was stoked today too, finally a real easy oil change with the hose on the bottom of the pan, slip it through the hole and emptied right into the oil container, no more pumping it through the dipstick. But of course, Murphy's law kicking me in the nutz once again with the filter, just can't catch a break!!!

good luck...another if needed....
http://cgi.ebay.com/MerCruiser-454-7...item3a63814d60

Thanx but I don't think that's the same one for my 525.

Your right, it looks different on the 525.....I'm sure someone on OSO has a few extra ones. Anyway good luck with that stuck filter......it's amazing how it could be on that tight. Been there and it is aggravating!

Not sure if your adapter is the same but on my 502mpi i simply took off the oil lines then unscrewed the center piece from the bottom, Came right off. Chisel was my next option if that didnt work. Will be a little messy but should come right off.

Take a utility knife and carefully work it under the gasket. If you get half way around the filter it should be enough to break it loose.

Last year I had to use a 24" pipe wrench with a 3 ft cheater, wrench had to grip the rolled edge or flange of filter to get a somewhat good bite. Is there ANY gap between the filter flange and adapter? If so, I thought that the next time I had problems, I would get thickest shim type stock that would fit between and use it to "injure" the rubber gasket, if it would not budge with normal filter wrench pressure. Haven't tried it yet as my next oil change (rebuilt engines) comes this fall.

I used a small hooked pick and I pulled out small pieces of the gasket. It finally gave way.

First try a quality oil filter removal wrench , if the filter starts to collapse , stop now ! go get a CHAIN wrench and apply it as close to the base as you can and away you go !

Same trouble on my 525s. Used very large channel lock pliers, just kept crushing and twisting.