Re: What type of outboard oil and lower unit grease/oil for johnson 70?
I would personally go to your local dealer and pick up bottle of the Hi-Vis Gearcase Lube and the needed oil.
Dont forget to get some new crush washers for behind the drain and vent screws. They are cheap and need to be changed everytime they are removed.
I would also get one of the pumps that attach to the bottles. They are much easier, and neater, to use than the toothpaste style tubes that you can buy. You simply remove the lower drain screw, place an oil pan under the gearcase, remove the vent screw, and let the old oil fully drain. Note the colour of the oil that exits first. If it is milky white, let us know. That indicates water intrusion, and will need to be addressed. Dark black is simply old and in need of a change. Once it is all drained, screw the pump into the bottom (drain) screw hole, and pump until fluid exits the top (vent) hole. That is when you know you are done. Replace the vent screw, with a new washer, that will create a vaccuum, allowing you to remove the pump and quickly install the drain screw, with a new gasket. Thats it, all done.
