What type of oil goes in a Evinrude lower unit?

You can use any brand of lubricant that has a grade designation of API GL5 SAE 80 or 90 weight. Make sure you do not mix different oil brands or weights. into the BOTTOM drain hole. Then slowly squeeze the bottle to force the oil into the lower unit.

How much gear oil does a lower unit take?

One quart of gear lubricant or lower unit oil. A lower unit oil pump. Oil absorbent.

Why is my lower unit oil milky?

You definitely have water in your lower unit oil. First check to see if the drain screw and vent screw have washers or o-rings on them. If not, I would put some on and try it out some more to see if it’s still leaking. If it is, get it to a shop.

What color should lower unit oil be?

What Color Should Lower Unit Gear Oil Be? Brand new gear oil should be a shade of blue, green, brown, or yellow, depending on the brand. Used gear oil should be a black/dark variation of the brand new color.

Can you mix synthetic gear oil with regular?

Yes. There is no danger mixing synthetic and conventional motor oil. However, conventional oil will detract from the superior performance of synthetic oil and reduce its benefits.

Can you overfill lower unit oil?

To answer, yes you can. I have seen guys that will pump it till the oil comes out the top which is correct, but will then put the top screw in & then give a few more pumps for “good measure”. This usually causes overfilling as well as a slight pressurizing if they get that bottom screw in real fast.

How often should you change the lower unit oil?

every 100 hours
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.

How do I know if my lower unit oil 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.