my 1991 toro with a 5.5brigggs and stratton engine 2in1 mowin 3 speed selfpropel with blade clutch
Its a beast!
Briggs made this engine back in the 90’s when they were losing business with toro because of jap engines(jap crap)
so they thought of the best, user friendly and best built motor. They call it “QT4”
its all in my “Legend of Briggs&Stratton” book