How do I remove the lower unit from my 1984 50 hp. Mercury outboard motor?
Never mind I figured it out
To rebuild a lower unit on a 40hp Mercury outboard, start by removing the lower unit from the engine by unscrewing the bolts and disconnecting the shift linkage. Drain the gear oil and disassemble the lower unit, noting the arrangement of parts. Replace worn components such as seals, bearings, and the water pump, then reassemble the unit, ensuring all parts are properly aligned. Finally, refill with the appropriate gear oil and reinstall the lower unit on the outboard.
The 1973 model, 7.5 hp Mercury outboard, requires 6.8 oz. of gear oil.
For a 90hp Mercury two-stroke outboard, you should use a high-quality lower unit gear lube specifically designed for outboard motors. Mercury recommends using their own brand of gear lube, such as Mercury High-Performance Gear Lube or Quicksilver Gear Lube, which offer excellent protection against wear and corrosion. Always check the owner's manual for specific recommendations regarding viscosity and any additional requirements.
Using Valvoline 75W-90 synthetic oil in the lower unit of a Mercury outboard is generally not recommended unless it meets the manufacturer's specifications. Mercury typically specifies its own gear lube, often requiring a specific type such as Mercury High-Performance Gear Lube or a similar product. Always consult your owner's manual for the correct type of oil to ensure optimal performance and to maintain warranty coverage.
Take it to a marine repair shop or google it up, the answer is there
No
It is a speedometer pick up tube.no longer used due to clogging.
Mercury® Marine High-Performance Gear Lube from Basspro
I use 80 weight gear oil.
pwd 40