Hello... I recently was given an older Sears Gamefisher 5 hp motor to use as a spare on my boat. It is model number 217-586612. This motor has had very little use, but the water pump doesn't seem to be working. I figured I'd check it out and replace it if need be. I'm having trouble figuring out how to get to it though. It looks like I'd need to drop the gear housing to get access, but the only two nuts I've found there still don't let me remove the housing. One side of the housing loosens, but the other is still tight. I'm obviously missing something, so any help from out there will be greatly appreciated. Thanks...