When your diver cleans the bottom of your boat (about once a month) he will also clean the thruster, mounts and blades. He will also need to know how to care for the zinc mounted in the propeller cone, how to check its integrity and also how to change it when the time comes! You will have to “educate” him!
This Zinc/Propeller Locking Nut Assembly is proprietary to the Rollexx boat stablizer, and is available from us for $65.00. You should keep 1 or 2 in stock for your diver to access when needed. This zinc protects the motor shaft and internals and is a very important maintenance item! Bad things can happen when you don’t maintain this zinc!
Download these Rollexx Maintenance Instructions(290 KB)
When the zinc has burned down about 1¾″ into the cone recess, it is time to replace it!
To change the zinc, use a 7/8″ box end wrench on the nut and a 3/8″ socket with breaker bar in the set screw in the center of the nut. Hold the nut from rotating with the box end wrench and rotate the allen wrench counter-clockwise a half turn or so to loosen the set screw. Then, while holding the propeller from turning, turn the zinc nut counter-clockwise to unscrew the zinc from the shaft.
To install a new zinc, just reverse the above sequence. Put a little grease on the shaft threads. Tighten Zinc/Propeller Locking Nut to 40-50 ft. lbs. torque and set screw also to 40-50 ft. lbs. torque to lock zinc in place.
When the zinc has burned down about 1¾″ into the cone recess, it is time to replace it!
To change the zinc, use a 7/8″ box end wrench on the nut and a 3/8″ socket with breaker bar in the set screw in the center of the nut. Hold the nut from rotating with the box end wrench and rotate the allen wrench counter-clockwise a half turn or so to loosen the set screw. Then, while holding the propeller from turning, turn the zinc nut counter-clockwise to unscrew the zinc from the shaft.
To install a new zinc, just reverse the above sequence. Put a little grease on the shaft threads. Tighten Zinc/Propeller Locking Nut to 40-50 ft. lbs. torque and set screw also to 40-50 ft. lbs. torque to lock zinc in place.
Zinc/Propeller Locking Nut Assembly is now installed on the propeller shaft and tightened snug plus ½ turn or so with a 7/8″ box end wrench to 40-50 ft. lbs. torque.
800-772-6165
International: 1+ 661-822-9311
G. Northcutt Corp
20843 Santa Lucia St. #C
Tehachapi, CA 93561
rollexx@boat-stabilizer.com$19750