RE: How damaging is a Powder Extinguiser
My 2 Cents
Think CO2 and forget about Halon or Dry chemical.
With a CO2 if you get a hot start and need to just give the motor a shot of CO2 there is no need to service the extinguisher un true with the others.
Laura
I think you will need to disassemble the motor and clean it up. The Dry chemical has a way of coating everything.
Ian'