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Is it a 2 stroke or 4 stroke engine, Gas or Diesel. I would suggest consulting your owners manual. On a 4 cycle engine use SAE 10w30 synthetic.
The fuel mixture for a Yamaha 40 hp 2 stroke outboard engine is 50:1, gas, oil mixture. You should use new gas when you get the engine ready for the season.
If its a power stroke it take diesel if it is a tridant it takes gas it all depends on what engine is in it
it all depends if it is a 2 stroke or a 4 stroke lawn mower
2 stroke oil
the first motorcycle used coal for its steam powered engine but now they use gas that doesnt completely answer the ? so with all honesty yes. in fact, all motorcycles use gas and oil. 4 strokes use fuel to run, and oil in the engine, where as a 2 stroke requires gas/2 stroke oil mix for fuel, and oil for the engine.
it is a four stroke engine. gas only. use four stroke motorcycle oil when you change oil in the crankcase. clean air filter also.
NO 2 stroke use mixed gas
Use regular unleaded gasoline, and mix it with four ounces of oil per gallon of gas - BUT, how you use it depends on whether your lawn mower has a 2-stroke or 4-stroke engine. A 2-stroke engine requires 2-cycle oil to be added to the gasoline in a certain ratio. 4-stroke engines do not require the gas/oil mixture.
It is possible to use 4-stroke oil in a 2-stroke engine in an emergency situation. You should not use this oil in the long term as it will damage the engine.
Your engine says to use leaded gas in it because when it was made, leaded gas was what you got. The lead was there to protect the valves in a four-stroke engine. A two-stroke like yours has no valves, so it needs no lead. Ipso facto, so long as you keep putting a good grade of two-stroke oil in your gas, you can run all the unleaded in it you want.
if its a 4 stroke then just regular gas, if 2 stroke 40:1 mixed.. but its most likely a 4 stoke so regular