2 stroke engine smokes. how do you adjust the fuel/oil mixture?

Hi Maria, Smoke blowing after a ride out or on start up is normally indicative of worn valve stem oil seals, normally caused by simply wear and tear if the engine has done few miles and regular oil/filter changes with a quality oil are important. Oil seeps into to cylinders past the valves so when combustion happens the engine burns the oil creating smoke. Take it to your bike garage for checking but it's not a cheap fix unless you know anyone whos a decent diy mechanic.

My oil pump packed up so i use 32-1 mixture which equates to approxamately 125ml 2 stroke per 4 ltrs of petrol

the mixture ratio is 50 parts gas to 1 part oil. Use only a good quailty stroke oil, never use motor oil

You can use regular gasoline in your lawn mower engine as long as it is not a two stroke. If you add oil separate from the gasoline, then it is four stroke, not two stroke. Something to keep in mind with today's gasoline is that it starts to go bad after about a month. So for example, if you leave fuel in it over the winter you will most likely have starting problems come the spring. These problems could include hard starting up to non start requiring a carburetor cleaning. Keep these things in mind when you buy your fuel and when you store your mower. If you are going to buy a lot of fuel or not use the fuel very fast, you can add fuel stabilizer to the gas soon after you get it to help with these problems. I am living in drought striken Texas and I use fuel so slowly right now that I have taken to adding fuel stabilizer when I purchase it.

I hope this helps you out.

On a 2 stroke bike cause of smoke is due to excess oil in the fuel oil mixture, incomplete combustion in the cylinder or the engine oil finding it way in through the piston rings into the firing chamber. Check the oil levels and clean the plugs, which must be black in color by now, so replace if possible and if engine oil is low, the change the piston rings. Also look up the carburetor jets/nozzles are clean and the engine gets the correct fuel/air mixture by adjusting both fuel and air jets(turns)...sodeep

White smoke in a small engine is oil. Oil in the cylinder will create too much pressure for the engine to achieve compression. Make sure the engine is not getting fuel into the oil and thinning the mixture (literally smell the oil... gasoline and oil smell nothing alike, if it smells like gas, it is). If this is the case, the carb is leaking fuel into the engine, thinning the oil and causing the oil to leak past the rings into the cylinder head, through the valves and, from there, into the exhaust to burn off. Black smoke indicates a direct fuel issue in a small engine, white is oil based.