It is a myth that a restrictive muffler will burn out a two-stroke glow engine.

The engine is basically an air pump. Anything that restricts the flow of air, simply reduces the amount of available power. This assumes that the carb mixture is maintained at a proper mix ratio. You can't just add devices to the engine without readjusting the carb.

Years ago, we used two-stroke glow engines that utilized variable exhaust baffle plates to maintain engine heat at reduced throttle positions. No one burnt up an engine because of it. While it is not the same thing, it is not totally unrelated.


Ed Cregger