Abstract: A vegetation trimmer unit having an open generally ‘U’-shaped frame with a power driven string line cutter mounted thereon. A linkage mechanism permits the cutter head to move relative to the frame against a spring biasing the cutter head in a direction outwardly away from the frame. The trimmer unit is suspendable from the free outer end of an extendible and retractable vehicle mounted boom. An actuator located on the vehicle is used to dispense sequentially predetermined lengths of line from the string line cutter.

Abstract: A deck lift system raises and lowers the cutter deck assembly together with the engine deck and engine as a single unit in order to adjust the cutting height of the mower. A tractor frame supports a foot platform and/or a seat upon which the operator may sit. The tractor frame includes first and second spaced apart sidewalls that are connected together with at least a cross wall member. A depression is formed at the rear of a cutter deck in order to enable a clutch of the engine to be moves closer to the grounds and/or further forward than would otherwise have been possible absent the depression.