Max Prop
Automatic Feathering Propeller


Frequently asked questions:

When should I grease the propeller, how often?

In simple terms greasing the Max-Prop once a year is perfect in most circumstances. The Max-Prop can be greased with the vessel on the hard or by a diver with the boat in the water. At a bare minimum it should be regreased every two years.

What grease should I use to grease the propeller?

The grease we recommend is Lubriplate 130AA. As it has been extensively tested and it performs well in all water temperatures. As an expensive alternative Lewmar winch grease performs well especially in warmer waters.

Do I have a Right or Left rotating prop?

The Max-Prop can be set for either right or left rotation, it does not matter to the propeller. The rotation of the shaft is determined by looking from the stern of the vessel looking forward. A shaft that rotates clockwise will have a right rotation propeller and a shaft that rotates Counter-clockwise will have a left hand propeller.

My engine is not reaching the max RPM, how much should I increase/decrease the pitch?

To increase the maximum Rpm’s that the engine can attain when powering in flat water you will need to decrease the blade angle setting. Each two degree change in blade angle will increase the maximum attainable Rpm’s by about 13%.

How long do the zincs last?

Zincs last anywhere between two weeks to two years depending on the galvanic activity on your boat and the water around your boat. On a new installation check the zincs often until you determine how quickly are deteriorating in your slip or mooring.

Do I need a shaft zinc or is the propeller zinc enough?

To a certain extent more zinc is better. The Max-Prop three blade has a zinc on it as it is often installed within an aperture where there is no room for a shaft zinc, and the propeller requires some protection. If the propeller shaft is supported by a strut it is a good idea to add an additional zinc.

Can the Max-Prop be serviced and repaired?

Yes the Max-Prop can be reconditioned and repaired. Whether that is normal wear, a blade bent in half, or pitting from corrosion, most damage can be repaired. To effect the repair the entire propeller, including the hub from the shaft, needs to be returned to PYI.