Abstract: A self cleaning filter for a small internal combustion engine (1) is disclosed. The filter (16, 36, 46) is generally rectangular and is located closely adjacent the air exit region of the engine's fan (2). The longitudinal axis of the filter is generally aligned with the direction of air flow. The filter can be flat (16), curved (36) or inclined towards the air flow (46). The arrangement permits a more compact configuration for the engine (1).

Abstract: A cutter guard in the form of housing, enclosing the volume generated by the rotating cutter blades of a lawn edge trimmer, golf bunker trimmer or like cutting implement. The housing is provided with at least one viewing port through which the plane of rotation of the cutter blades can be observed by the operator. To prevent egress of cutting debris, each viewing port is occluded by means of either transparent material or mesh material. A supporting wheel arrangement for a golf bunker edge trimmer includes a support wheel provided with a coaxial disc which engages the grass adjacent the edge of the bunker. The disc prevents the wheel and trimmer slipping downhill towards the bunker whilst traversing steeply sloping grass uphill of the bunker. Dual wheels and an independently rotating disc can be used.

Abstract: A cutter guard in the form of housing (8), enclosing the volume generated by the rotating cutter blades (5) of a lawn edge trimmer (1, 51), golf bunker trimmer or like cutting implement is disclosed. The housing (8) is provided with at least one viewing port (20, 21) through which the plane of rotation (15) of the cutter blades (5) can be observed by the operator. To prevent egress of cutting debris, each viewing port (20, 21) is occluded by means of either transparent material or mesh material. A supporting wheel arrangement for a golf bunker edge trimmer (51) is also disclosed. The support wheel (66) is provided with a coaxial disc (60) which engages the grass (61) adjacent the edge (53) of the bunker (54). The disc (60) prevents the wheel (56) and trimmer (51) slipping downhill towards the bunker (54) whilst traversing steeply sloping grass uphill of the bunker. Dual wheels (66) and an independently rotating disc (52) are also disclosed.