This is the older doc I downloaded somewhere a few years ago
Everything appears the same except for the jet
I don't think I will need to do the hi-po mods to a PT - they aren't too highly stressed on any of the lawns I put them over. Slashing duties go the the old Big Bob with gxv120 - which really shows the benefit of having a large reciprocating mass (blade disk) as it punches way above its weight
I can see the benefits of the correct jet, poppet, etc on a 600 or pro550 expected to cut 4 ft tall weeds though
Slightly off topic, but I happened across this in an old briggs document
It begs the question "who would copy a briggs"
Answer - "Probably the same person who would eat a bat"
