It is a 2 stroke so it is in the gas and the lower unit has gear lube in it which can be checked by removing the upper plug on the side of the unit.
If your engine has electric shift, a special gear lube is required. If it is a mechanical shift, ordinary hypoid 90 will work. Seems the special lube was called premium blend, but I could be wrong about the name. I would give a quick call to a Johnson dealer to verify availability of the special lube if needed.
The Quicksilver high performance lube will work perfectly fine in a 40 hp Honda. This lube was formulated for use in larger, high demand gearcases and outdrives. The only precaution to note is not to mix this lube with other types of gear lubricant.
The 1970 model, 60 hp Johnson outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
1970 40 HP Johnston outboard weighs 145 lbs.
For the 80 hp Mercury, you may use any brand of gear oil that has been blended for use as an outboard motor gear lube. There are many brands available other than oem, and are specially formulated for outboard use.
how do you get to the gears on a johnson 50 hp marine
Mercury Premium gear lube is caramel-clear in color. It should be changed every year or 100 hours of use. If it gets old and smelly it should be changed. If you see white streaks you have water leaking in through a bad seal. Mercury High performance Gear lube is blue/green-clear. See more at sterndrives.com
The point gap for the 50 hp Johnson outboard is set at .020".
what is the weight of a 15 hp johnson
The 25 hp Johnson outboard runs a plug gap of .030 in.
from the top of gear case housing at mounting bolts hole measure the shift rod at 21.5 inches to center of hole in shift rod,in neutral gear.