Replaced raw water pump cover with “Speedseal” cover

The stock cover requires you to replace the gasket everytime you pull off the cover (and it frequently leaks anyway), so in effect you are encouraged never to take a look at your impeller unless something goes wrong.  Problem with this is that when something goes wrong with your impeller, seawater stops circulating and your engine overheats, very possibly resulting in expensive damage. The speedseal cover is engineered with an o-ring in a groove; no gasket is necessary.  They supply it with hand screws, so that you can get it on and off in a hurry.  I think it cost about $80.  I can’t tell you yet whether it was worth it (not until something happens).