Where Is My Outboards Oil Drain Plug?

[tcbass]

I was told that I should drain my outboards motor oil (not lower unit oil - although you should change your lower unit's oil every year too) every year and put new oil in it. I didn't realize this and ran it 2 years staright. It's an oil injected motor so I put oil in one tank and it automatically mixes it in with the gas. I cannot seem to find the drain plug for this. The two drain screws on the right side of the lower unit are both for the lower unit oil. It's a 2000 Mercury 115 horse 2 stroke.

 

 

Where is the oil plug drain on this motor?

 

 

 

 

Two lower unit oil drain plugs:

 

 

 

[slonezp]

No drain plug on a 2 stroke. It burns the oil with the fuel. 4 strokes have drain plugs

[Smokinal]

^^^Correct. If it's a 2 stroke, you just keep the oil tank filled with the correct marine 2 stroke oil and it mixes itself. The level will gradually go down the more you run it so you just top it off again and that's how the cycle works. No need to drain any of that.

[Way2slow]

This reminds me of years back when I sent a guy to the lumber yard to borrow their board stretcher, and he fell for it. Lumber yard sent him to their saw mill, thirty miles away. Saw mill told him they were using theirs and sent him to another location. Four hours and no telling how many miles later he gets back to the plant, in somewhat of a fowl mood. Somebody finally told him he was had.

You have to understand though, this was the same guy that, a few days later I give him my 12 foot tape and asked him to measure some 2x4's being received to see if they were the 14 ft or 16 ft we were waiting on. He heads out the door and a couple minutes later comes back in saying "you thought you had got me again, sent me to measure boards that long with a 12 ft tape".

[Al Wolbach]

The two plugs you see in the lower unit picture are not the lower unit drains either........The actual drain plug for the lower unit is below the exhaust on the nearly round part on the lower unit. The plug on the right(picture) must be removed to fill/drain, not sure what the purpose of the plug on the left.....Al

[WIGuide]

The two plugs you see in the lower unit picture are not the lower unit drains either........The actual drain plug for the lower unit is below the exhaust on the nearly round part on the lower unit. The plug on the right(picture) must be removed to fill/drain, not sure what the purpose of the plug on the left.....Al

If I had to guess I'd say it's fill port for the lower unit so you don't have to fill from the bottom and then cap the top and race to get the screw in before the oil starts running out. I could be wrong, maybe someone else answer that question. 

[Smokinal]

^^^Yup, the actual drain is on the very bottom and I take out one of the 2 top plugs to vent while draining. When I fill, I put the lower plug back in, remove both upper plugs, fill into the higher of the 2 upper plugs until oil comes out the lower of the 2 upper plugs; then put back both upper plugs.

While we are at it, don't forget to remove the prop and check for and remove fishing line that may have gotten wrapped around the prop shaft. This can tear up a seal pretty quick.

[1BADAIR]

I had a 2001 115. Always filled the lowed unit from the bottom with a pump.  Fill til you get to the lower top hole. Install both upper plugs then barely any comes out will removing pump and installing lower plug.