I've installed my thunder tiger pro .36 engine but the instructions do not mention what these o rings are for? ( see pic )
Are they spares for something in the carb?
this is my first venture into glow engines..

Also I'm not sure how to route my fuel lines. they exit the firewall right behind and below the engine.
I would think care must be taken to avoid touching the hot engine? will it melt the line? how long is to long for the hoses?
I just finished adjusting the front wheel and will add the side cowling on this side of the engine.

I'm hoping to fire the engine up today!!!

Thanks

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