Re: Honda 115 outboard gear case lube change
Go to your local outboard/boat/marine vendor and get the gear oil cange hand pump kit. It will have the fitting needed to connect to the bottom of the skeg where the drain plug goes. Remove the fill plug at the top, connect the pump to a Qt of honda gear oil and pump it in until the oil level reaches the top hole. Book states 1.1 Qt. The messy part is now with removing the fitting for the pump, keeping the gear oil from running out, while installing the drain plug screw.
Don't forget to repace the gasket on the drain plug screw and fill screw.