We have a Littlefield magnesium 1271 on gas 25% over. The clearance at the bottom of the housing and the nylatron is .005" to .006". The one thing I'm concerned about is the teflon in the valleys of the rotors has some rough edges and mild scoring, I don't know if this is normal wear or a red flag. If a rebuild is in order, who does everyone use?
Thanks, Tom