How do you remove the lower unit on an outboard motor?

How do I take my lower unit off?

How do you get rid of mercury in lower cowling?

How do you change a lower unit seal on an outboard motor?

How much does it cost to replace lower unit seals?

say ~ $250 – $300 or so, depending on shop labor rates where you are. To replace other seals (shift rod and drive shaft), the LU needs to be dropped and the water pump pulled, so it’s more again.

How much does it cost to repair a lower unit?

A typical set of parts for the gearcase can cost $500-600 and may go higher if the gearcase is severely damaged. If you have your local mechanic repair the lower unit, his labor will run about $300-400 for this type of repair.

Can you run an outboard motor without the lower unit?

Yes you can run it without lower on with water hooked up to it, done it before. Don’t turn water on all the way,remember the size of the copper tube compared to your hose.

How much does it cost to rebuild a Mercury lower unit?

It cost $1500.00 to rebuild. There are special tools needed, and most important shiming of the gears. For $300! No brainer.

How do I know if my lower unit is bad?

Bad outboard lower units can give the operator shifting issues, and other signs will include water in the gear lube, metallic particles on the drain screw magnet, clunking sounds when shifted, or the loss of the ability to shift into gears.

What color should my lower unit oil be?

A greyish milky color to your lower unit oil indicates water in the oil. Unless it is excessive, on an older motor, this is normal and why you drain it, and replace it, before it freezes.

How often should you change lower unit oil?

Most sterndrive and outboard manufacturers advise you to change the gearcase oil in your lower unit every 100 hours or once a year (whichever comes first). Clean oil is critical for protecting the heavily loaded gears in your lower unit and preventing expensive damage.

What causes water in lower unit of outboard motor?

This is usually caused by a leaky seal due to fishing line or other fine debris that got wrapped around your prop shaft. If you have water in your oil, don’t finish the oil change because water will just seep back in when you get out on the water.

How do you oil the lower unit on an outboard motor?

Where should water come out on an outboard motor?

The cooling system on an outboard is a very simple and compact application. Water is inducted through the lower unit by a water pump impeller, and then forced upward to circulate throughout the powerhead, and eventually exits through the exhaust system.

How much oil does an outboard lower unit hold?

This 8-step process is all it takes to ensure the oil in your lower unit is properly maintained.


Lower Unit Oil Needed by Model
Model Approximate Fluid Ounces Required
6 (4-stroke) 6.6 fl oz
8 (2-stroke & 4-stroke) 10.8 fl oz
9.8 (2-stroke & 4-stroke) 10.8 fl oz

Can I use regular gear oil in my lower unit?

So, can you use any old gear lube in your marine lower unit? If you want the best protection possible, and want your lower unit to last as long as your boat, then the answer is no. Consult your engine’s manual and look for the proper marine gear lube for your application.

Do you have to drain lower unit oil to change impeller?

Yes, you will need to drain the lower unit fluid.

How much oil does a Mercury Verado 350 hold?

4 Stroke Outboard Oil Capacity & Filter Chart
Model US Crankcase Capacity
250 Verado 6 cylinder 7.40 QT. (246 oz.)
275 Verado 6 cylinder 7.40 QT. (246 oz.)
300 Verado 6 cylinder 7.40 QT. (246 oz.)
350 Verado 6 cylinder 7.40 QT. (246 oz.)

How many hours can you get out of a Mercury Verado?

So at 100 hours per year, with a potential life of over 6 thousand hours on the motor, you should be good for the next 60 years on that motor. Marty, No reason at all that you should not be able to easily get 6000 hours on your motor with little to no maintenance except for spark plugs.

What is the fuel to oil ratio for a Mercury outboard?

As a general rule of thumb, add three ounces of Mercury 2 stroke premium outboard motor oil for each gallon of gas. Pour the gas and oil into a singular container. Close the gas container tightly and then shake the container vigorously to ensure that the oil and gasoline mix thoroughly.

How do you manually shift a Mercury Verado?

You can manually shift the engine by pushing the shift actuator arm. You can also turn the key on and shift it into reverse without the engine running. This only works in reverse, not forward. Just drop the lower, and turn the shift shaft.

How do you take apart a mercury control box?

The Mercury control box can not be removed without removing the control handle. To remove the handle, you use a screwdriver to pry out the center button, usually breaking it in the process. It is a push on button not really designed to come off so you will need to use excessive force.