How long should it take to drop the lower unit and replace the impeller, gaskets and o rings? I have a manual! It doesnt look that hard. And is there any tricks or things I need to look out for? Thanks!
Follow the manual any you will be fine. How long it takes depends on how old the engine is and how corroded things are (if at all). The first time you do this will probably take a couple hours. The next time it will take 45 minutes.