going to do a h2o pump change in my motor next week. The guy at the local shop told me all I needed was an impeller and that the housings didn't give much trouble with these motors. He said I probably didn't even need a gasket for the housing that you most of the time could re use them in a Mercury, but not likely in an Evinrude. I've also hear nightmares about getting the shift shaft out of time. What can I do to minimize this problem. I am a mechanic so I can find my way around an engine, but outboards are new to me. I've heard to put the motor in gear before dropping the foot. All I see are 4 bolts in the foot also, does this sound right, or are there some hidden somewhere? He also quoted me around 22-25 bucks for an impeller. Does this price sound about right? Thanks for all input!