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Changing the gear oil in a 4 stroke outboard, is the same proceedure as with the 2 stroke.
Remove the drain plug, at bottom of gearcase, remove vent plug at top of gearcase and let drain. Fill from bottom, (drain plug hole), until lube runs out of top, (vent plug hole). While blocking off drain plug hole, to keep oil from draining, replace vent plug. Make sure that plug gaskets are in place and in serviceable condition. Quickly, replace the drain plug.
What else can I help you with?
1980 115 hp outboard motor mercury oil change how?
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....
How do you change lower unit oil in a Yamaha 115 four stroke?
To change the lower unit oil in a Yamaha 115 four stroke one must obtain proper parts, the proper tools, and instructions on how to properly take apart and put together the parts.
Lower unit diagram 50 hp mercury?
How do I remove the lower unit from my 1984 50 hp. Mercury outboard motor?
Will a 35 HP Mercury lower unit interchange with a 40 HP lower unit?
yes
What type of lower unit gear lube for 90hp mercury two stroke outboard?
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 you change lower unit oil in 50 hp mercury outboard?
Take it to a marine repair shop or google it up, the answer is there
How do you change a water pump impeller on a 2003 40 hp Mercury EFI 4 stroke?
Pull the lower unit look into moter leg you will see th water pump on the shaft you may have to pull the shaft to get it but from ther its just bolts on the pump.
What type of oil do you use in mercury outboard lower unit?
If the horsepower of your Mercury outboard lower unit is 75 and below, SAE 80W90 Gear Lube is recommended.
How often do you change lower unit oil in 40hp mercury?
It really depends on usage, but a good rule of thumb is once yearly.
Mercury Marine water pump location?
In the lower unit or gearbox
Mercury 90hp 6 cylinder outboard 2 stroke before you take this too water you are going to change the spark plugs is there any oil which requires changing gear oil if so what type thanks?
Changing the plugs and the lower gear oil yearly is best. There are two flat head screw heads on the lower unit, an upper one for filling and a lower one for draining. Be sure to use marine grade lower unit oil not just regular gear oil.
Where is the oil drain plug for 25hp 4 stroke mercury outboard?
The oil drain plug for a 25hp 4-stroke Mercury outboard is typically located on the lower unit of the engine, near the bottom. It can usually be identified as a hexagonal or slotted plug. To change the oil, ensure the engine is cool, remove the plug, and allow the old oil to drain completely before replacing it. Always refer to the owner's manual for specific details and maintenance guidelines for your model.
