Never mind I figured it out
How do I remove the lower unit from my 1984 50 hp. Mercury outboard motor?
If the horsepower of your Mercury outboard lower unit is 75 and below, SAE 80W90 Gear Lube is recommended.
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.
To change the water pump impeller on a 2001 Mercury 115 HP outboard, first, remove the lower unit by disconnecting the shift linkage and unbolting the lower unit from the powerhead. Once the lower unit is removed, take off the water pump cover by unscrewing the screws and carefully lift the old impeller out. Install the new impeller, ensuring it is oriented correctly, and reassemble the water pump cover and lower unit. Finally, reconnect the shift linkage and secure the lower unit back to the powerhead.
It is easy...remove the lower unit..about 5 bolts. If you want to see this done YouTube it...a lot of good videos for DIY.
To remove the bottom end of a 1991 Mercury Classic 50 outboard motor, start by disconnecting the battery and draining the gear oil. Then, remove the lower unit by loosening the bolts that secure it, typically found on the anti-cavitation plate and the side of the unit. Carefully lower the lower unit straight down to avoid damaging the shift shaft. Finally, you may need to remove additional components, like the propeller and exhaust housing, depending on your repair needs.
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.
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.
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.