Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

yes definitely,(exhaust smell) especially if you run it to rich, I ran it in the house for about 30 seconds to show Ang I got it working good...then back outside it went, even in my closed shop 15-20 minutes was enough to make a noticeable stink with some eye irritation. i was asked some questions about it from a you-tube viewer & this was my reply...... "it really only has one speed ,you can lean out the carb or make it more rich & change the speed somewhat, I am still learning how to operate it but I found about 1/2 turn counter clockwise from completely closed helps it to start (a rich position) then when it warms up you can adjust the carb knob back to not quite a1/4 turn, it also helps to squeeze the fuel line right under the carb (before starting) seems to act like a primer bulb & definateley helps cold starts. there is no on/off label for the switch, but mine is (looking from the back) switch to the right is on".
i'm going to experiment on different types of gasoline & see what it prefers. i'll get back on here when I know anymore. i also intend on making a  miniature roll around cart for it.