Re: Rude lower unit oil change 93 40 hp
Yes, there is a reason. <br /><br />Filling from the bottom-up ensures you don't get air pockets trapped in the housing, preventing it from filling completely. Many an otherwise OK gearhousing have been ruined for this very reason.<br /><br />As for the gear oil, use Johnson/Evinrude either "hi-vis" or "Ultra HPF" from your Johnson/Evinrude dealer. Sure there are others, but why not use what it came with.