For a 2004 Mercury 115 outboard, you should use Mercury High Performance Gear Lube or a suitable equivalent that meets the manufacturer's specifications. Ensure the oil is specifically designed for marine lower units to provide optimal protection and performance. Check the owner's manual for any specific recommendations or requirements.
If the horsepower of your Mercury outboard lower unit is 75 and below, SAE 80W90 Gear Lube is recommended.
How do I remove the lower unit from my 1984 50 hp. Mercury outboard motor?
The 1973 model, 7.5 hp Mercury outboard, requires 6.8 oz. of gear oil.
Never mind I figured it out
Mercury® Marine High-Performance Gear Lube from Basspro
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.
The lower cowl on a vintage 1973 Mercury 9.8HP outboard motor with 4 retaining bolts. They are passed through the cowl and directly into the body of the boat.
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.
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.
You will probably have to drop the lower end of the outboard. Its sound hard but really it is usually quite simple. The pump is nothing more than rubber impeller on a brass collet.