Why does the Gamajet IV have two different options for gear ratios (273:1, 675:1)?
The Gamajet IV can be used over a wide range of flow rates and for flow rates over 120-130 gpm, the nozzle will spin to quickly to provide proper cleaning. The 655:1 gear ratio allows the machine to use the higher flow rate but still maintain a properly paced rotation and therefore jet dwell time.