HOW TO DISASSEMBLE A MARTEC PROPELLERThese instructions apply soley to the MARK II EXPLORER and MARK III ELIPTEC
Close blades together and remove the two cotter pins which hold the pivot pin in place to the hub (connecting blades to the hub).Tap-out pivot pin & remove blades
Remove two cotter pins from opposite sides of hub and each one extending through the hub into the shaft nut. Pinch ends of cotter together & pull from outer side of hub.
Use (socket) extension to reach shaft nut (recessed inside end of hub), then, turn nut counterclockwise to loosen.Do not remove nut entirely, as sometimes the hub (next step) may come flying-off the shaft with a lot of force. For this same reason, do not stand directly aft of the shaft, but rather, stand to one side.(Note: 3/8” extension fits 3/4” & 7/8” shaft, ½” extension fits a 1” and larger shaft sizes.)
If you do not feel totally comfortable or competent in performing any of the following steps, and/or you do not have the appropriate tools/equipment, you should consult &/or hire a professional (boatyard, prop shop, etc...) to perform this service
It is important that you understand a propeller hub and shaft are machined tapers, which generate a tremendous amount of holding power.Start by tapping the forward end of hub with a hammer and punch in order to separate the hub and shaft. Use caution when using this method, as prolonged hammering can damage the hub and shaft.
Please note, if not successful after a few tries with the hammer and punch method, it will then be necessary to use a wheel-puller.
If at this point you have not had success with the removal of the hub from the shaft, we suggest that you consult a professional. Remember to look for the “key” (bronze) as hub is removed; you will need it when re-mounting the hub on shaft
If you have any further questions please do not hesitate to contact us, we'll be happy to help.