I picked up a 2004 Honda 4 stroke 20 hp for my classic. Before I use I wanted to replace the oils. For the lower unit is Quicksilver Gearlube ok or is the viscosity different from manufacture's recommendation. Also I was planning on changing the engine oil with quicksilver 5w-30 platinum. Any suggestions? Do you have to fill from the bottom on the lower unit or can you fill from top and turn prop. I heard it both ways. Any thing else I should change since I don't know the prior owner's maintenance schedule? Thanks,
I've always heard and done "fill from the bottom". Get a pair of cheap rubber gloves, invest in a lube pump (~$9) and pump it in. Less mess, less waste, keep the pump for future oil changes. -T
