Q1. How much space is required on the shaft for a PROP PROTECTOR?
For most shafts the SLIDE-ON style requires a gap on the shaft of 7/10" and the CLAMP-ON a gap of 9/10". These dimensions include a 1/4" of space on the shaft to allow water to circulate to the cutless bearing.


Q2. How long does it take to install the PROP PROTECTOR?
A2. Both models can be installed in about 10 mins. Simply dimple the shaft with a drill bit or file a flat. To install the SLIDE-ON style the propeller must be removed. Detailed installation instructions are supplied with each cutter.


Q3. Will I need to buy new bearings for the PROP PROTECTOR every two years or so as with other cutters?
A3. No. PROP PROTECTORS have no moving parts and require no bearings.


Q4. Will I have to install zincs for the PROP PROTECTOR?
A4. No. The zinc usually installed on the propeller shaft will also protect the PROP PROTECTOR.


Q5. Will the PROP PROTECTOR corrode?
A5. No. PROP PROTECTORS are made of high grade 316 stainless steel and will never corrode.


Q6. Will I have to send my PROP PROTECTOR to the manufacturer for sharpening as with other shaft drive cutters?
A6. No, it can be sharpened by you with a ceramic sharpening stone.


Q7. Will my PROP PROTECTOR break on sun-hardened rope as some "chopping" style cutters tend to do?
A7. No, your PROP PROTECTOR will continue cutting while the shaft is turning.


Q8. Will my PROP PROTECTOR affect hull speed to a measurable degree?

A8. For vessels cruising at 25 knots or less the affect on boat speed is negligible. For high speed vessels at above 30 knots, RPM may have to be increased by about 10%.


Q9. Will my PROP PROTECTOR make a noise when the shaft is turning as some "chopping" style cutters do?

A9. No. PROP PROTECTORS are completely silent in operation.


Q10. What maintenance will my PROP PROTECTOR require?

A10. It must be sharpened as required and kept free of barnacles with a suitable antifouling. If the edge is damaged by a hard object, the cutter can be re-furbished in most cases.


Q11. How long has PROP PROTECTOR been on the market?

A11. PROP PROTECTOR has been selling in the USA since 1995 and was marketed in Europe since 1992. About 13,000 are presently in use.