I have a Mercury 125 elpto outboard engine on my Bayliner Capri. How do I tell if it is 2 stroke or 4 stroke?

Question

2001

Answer 1

Do you add oil to the gas you put in the tank?  If you do, then it's a 2-stroke.  If the engine has a separate oil reservoir, then it's a 4-stroke.

Answer 2

A very easy way to tell is look for an oil dipstick on the engine.

If it has one, it's a four-stroke. If it's mixed gas or oil injected, it's a two-stroke.

Good Luck!

Answer 3

2 stroke you add tcw-3 oil to the gas

4 stroke is like a car engine no oil added to the gs