You unscrew the top plug on the lower unit and carefully unscrew the drain plug on the bottom and quickly put the nozzle end of the oil container in it and keep squeezing till the oil just starts to come out of the top hole. This runs any water and/or air out and guarantees that the gearbox is lubed properly.
How do I remove the lower unit from my 1984 50 hp. Mercury outboard motor?
Depends where the water (ie coolant) intake is
how do u remove the lower uint on an outboard motor? Depends on the outboard. Some Johnson/Evinrudes required that the powerhead (engine) be removed first for example. Look for a service manual for your particular motor on ebay, and it will tell you all you need to know to avoid problems.
first of all what oil your are talking about , i hope not engine oil because there is non that is two stroke engine. lower unit has a draining bolt on the bottom and air or fill bolt on the top of the lower unit....
No
I use 80 weight gear oil.
I would assume there is no oil reservoir in that motor. The oil is mixed in with the gas each time you fill the tank. There is probably lubricant (oil) in the lower unit gearcase, but I don't know the procedure for changing that.
It is a speedometer pick up tube.no longer used due to clogging.
If the horsepower of your Mercury outboard lower unit is 75 and below, SAE 80W90 Gear Lube is recommended.
There are two fill/drain plugs located on the right hand site of the lower case. Remove them and drain the lubricant. Once emptied force the new lube into the case using the lower port. When it starts to come out the top it is full and you can reinstall the drain plugs. Always fill from the bottom port or air pockets will get trapped in the case.
pwd 40
Buy a 32oz bottle and a pump to go on it, you will use almost close to half.