I have always already had this question-

2c OS glow engines always came with a baffle in the exhaust. Presumably, this is to reduce the sound output of the engine. But I was always told it reduces power output as well and since our field doesnt really have noise issues, I was always asked to remove it. Dont know whether it really makes a difference though.

Thing is, whichever engine I removed the baffle from, didnt last too long or was eratic in operation, whether due to the baffle or some other reason I am not sure. But some on the field insisted on leaving the baffle on for the 46 and 55 due to the next reasoning

Another point of thought is the location of the baffle- on smaller engines like the 46ax and the 55ax, the pressure nipple that pressurizes the fuel tank (vent line that goes back to the tank and also serves to push fuel to the carb) is located before the baffle whereas on the 75ax, the nipple is located after the baffle. Since the baffle definitely increases upstream pressure, this would mean the 46 and 55 require the higher vent pressure to work properly whereas the 75 isn't as dependent on vent pressure.

Just wanted to know everyone's thoughts on this issue

Ameyam