NOTE: PROP PROTECTORS are not designed to be used with outboard or stern drive engines. Diagrams are not to scale and the gaps shown are exaggerated for clarity.

The Slide-On Prop Protector

Slide-On: Manufactured in one piece with a width of only 12mm (0.47"), it is designed for installations where the gap between the propeller and the shaft bearing is small.

A gap of 18mm (0.7") is sufficient; this includes 6mm (1/4") of space for water to circulate to the shaft bearing. This type is available for shafts of 20mm (3/4") dia. up to 50mm (2"). It simply slides onto the shaft after the propeller has been removed and is secured with a set screw that locates into a small drill dimple made in the shaft.

The Clamp-On Prop Protector

Clamp-On Standard: Supplied as an assembly that is split into two halves along the longitudinal axis so that it can be installed on the shaft without removing the propeller. The width is 17mm (0.67"). A gap of 23mm (0.9") is sufficient; this includes 6mm (1/4") of space for water to circulate to the shaft bearing. It is clamped onto the shaft by two Allen screws and is also fixed by a set screw that locates into a small drill dimple made in the shaft. This type is available for shafts of 20mm (3/4") dia. up to 40mm (1 5/8").

Clamp-On Medium: Manufactured and fitted as the Standard, the width is the same, the only difference is the blade diameter that is 105mm (4.13"). This type is available for shafts of 1 3/4" dia. & 2" and 45mm & 50mm.

Clamp-On Special: As above but with a larger blade diameter of 127mm (5"), for vessels with extra-large stern bearings and big propeller hubs.

Clamp-On Large: Manufactured and fitted as above, these large cutters have a width of 22mm (0.87"). A gap of 32mm (1.26") is sufficient; this includes 10mm (0.39") of space for water to circulate to the shaft bearing.

Clamp-On Extra Large: For vessels that are built with large struts or stern bearings. They are fitted in the same way as other Clamp-On units and have a width of 30mm (1.18"). A gap of 42mm (1.65") is sufficient; this includes 12mm (0.47") of space for water to circulate to the shaft bearing.

Cutters in the range 65mm (2 3/4") to 100mm (4") are for use on large vessels such as trawlers, fishing boats, harbour patrol boats, luxury yachts and cruisers. These cutters have a width of 33mm (1.3"). Not all cutters in this range are held in stock, please allow 3 to 4 weeks for delivery.

Slide-on

Clamp-on

Typical Prop Protector Kit

This shows the typical kit you will receive when purchasing your Prop Protector. Kit includes Prop Protector, allen screws with pre-applied locking paste, allen keys, safety warning labels and full fitting instructions.

(clamp on kit shown)