K3 - 3 Bladed unit:

The image below depicts what is termed a " puller " used to remove a shaft mounted unit from a tapered shaft mounting. These would be available from any marine engineer buit can also be purchased in various forms from Amazon or any machonery warehouse or similar.

These are available ion two and three legged verisons - the three legged version is preferred as each leg will then easily go forward between the three blades.

A two bladed unit is more appropiate for a K4 four bladed unit. Some types have sliding legs that allow for a 2 or 3 bladed  configuration from the same unit.

The photo below shows a Saildrive mounted unit. A shaft mounted unit is identical - but will not have the central M8 Locking Cap screw - Blue arrow.

• Lock the unit in gear if possible - not critical

• Loosen both of the two M8 set screws - white arrows - until their outer ends are just flush with the boss. Very early models  - circa 2004 - with a bronze boss may only have one M8 set screw for locking

• Undo the square drive nut - red arrow - with a 1/2" square drive socket set with no socket mounted - Anticlockwise

K4 - 4 Bladed unit:

The photo below shows a Saildrive mounted unit. A shaft mounted unit is identical - but will not have the central M8 Locking Cap screw - Blue arrow.

• Locate the spigot pin protruduing into the internal recess of the nut that locks the nut - 1 of 8 possible places  - White arrow indicates 1 / 8 possible locations

• Undo the M10  set screw set with the spigot attached  - Anticlockwise -  and withdraw the locking spigot

• Now undo the square drive nut - Red arrow - with a 1/2" square drive socket set with no socket mounted - Anticlockwise