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Hi there. I have a 2 Stroke Tecumseh 3.5 mower. I loaned it to somebody who then put straight gasoline into it with no oil and then called to say its not running properly. I drained it out when I got it back and refuelled with proper mixture. Now when I use full throttle it starts sounding like a Helicopter and starts billowing out white smoke. Any ideas where I might start looking for the problem? I am a newbie when it comes to 2 stroke engines. Many Thanks
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