The tachometer/bladeshaft rpm gauge on the FS 6600 D and FS 4800 D indicates engine rpm or bladeshaft rpm. Bladeshaft rpm range is color coded to gear selection position.
On the FS 6600 D and FS 4800 D, the gearbox shift lever is used to change the output speed of the engine gearbox. Three speeds and two neutral positions are standard on 3-speed models. The gearbox shift lever positions are color-coded to match the blade diameter and the bladeshaft rpm decal located on the control panel. Gearbox detent locks the gearbox shift lever in position.