Abstract: An outboard motor adaptor (10) comprises an upper housing (12) provided with a connection bar (24) having formations (28, 30) thereon for engaging with bar studs (44) on a chainsaw housing (42). A stem (14) extends from the upper housing (12) and a lower skeg and propeller portion (16) is provided on the opposite end of the stem (14). The skeg and propeller portion (16) is provided with a propeller (32) thereon. A drive sprocket (22) is provided on the upper housing (12) adjacent the bar (24). The drive sprocket (22) is operatively connected to the propeller (32) for driving the propeller (32). A drive chain (26) extends around the drive sprocket (22) and the connection bar (24). A space (48) is provided between the bar (24) and the drive chain (26) at the location opposite the drive sprocket (22) for receiving a chainsaw sprocket (46) of a chainsaw motor in the space (48) to engage with the drive chain (26), thereby to drive the drive sprocket (22) and the propeller (32) through the drive chain (26).

Abstract: A hub and tine assembly for a rotary debris remover is provided which comprises a hub which is rotatable about a shaft and a plurality of tine members which are arranged symmetrically around the rotation axis of the hub. The tine members are pivotally connected to the hub at locations which follow a circular rotation path around the rotation axis of the hub when the hub is rotated. Each tine member has at least one tine which projects from the hub. The tine member has a centre of gravity which is located so that the tine is offset from the radial direction when the hub is rotated and displaced in a direction which corresponds with the direction of rotation so that the tine can effect a "punching" effect on debris in its path.

Abstract: A manually portable rotary debris remover, particularly adapted for clearing tree planting sites, has a remotely mounted, power driven, rotating hub on an extended support, such as a chain saw blade. The rotationally driven hub has a plurality of pairs of coiled tine members, each pair radiating out from a respective tine shaft mounted in the hub equidistantly from the hub axis. The tine shafts are each inclined from 3 to 10 degrees from perpendicular to the plane of rotation of the hub, so that, in rotating, the tines of each pair do not simultaneously strike objects in the path of rotation of the tines when clearing debris.