Stihl MS170 Air Filter/Intake Mod

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cgeb

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Stihl MS170 Air Filter/Intake Mod question. This filter has the hole in the center which appears to me to run straight into the carb. Seems like a strange design and gives the opportunity for debris to enter the chainsaw. My MS290 and husky isn't designed that way. Has anyone mated up another filter that would provide better protection? I had a spare MS250 filter that mates up but is to tall for the air filter cover to close on. Thanks
 
The area above the filter is sealed off from the outside air, and the sealing lip on the top cover presses down onto the filter. Cheap aftermarket filters do not seal well.
 
Thanks. I guess if I want to insure the seal I could run a thin layer of silicone gasket material across the sealing lip of the top cover and let it dry.
 
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