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I chose the Gori 2-blade folder to replace my 2-blade fixed prop. To have good service and installation. Nationals had 2 blade Martec folding props.

( 2) - Blades (1) - Hub (1) - Monel Pivot Pin (1) - Key (4) - Monel Cotter Pins (1) - Nut TOOLS NEEDED Wheel-puller (to remove fixed prop or hub from folding prop) Soft rubber mallet (to tap hub if necessary) File (for key, if slightly oversize) Pipe Wrench (to hold main gear) Socket wrench and extension: 3/8' for shafts 3/4' and 7/8' diameter & 1/2' for shafts 1' or larger Optional Equipment - Drill and 1/8' drill bit INSTALLATION OF MARK III ELIPTEC PROPELLERS Assemble hub, key and nut on shaft. Keystock may be slightly oversized. If necessary, file the top and bottom to insure proper fit. Thread and tighten cylindrical nut with socket wrench ratchet and extension. Line up cotter pin holes in hub and nut, as you reach full tightness. Do not loosen nut if opposite holes are not in-line.

Instead, enlarge existing holes or drill another one with a 1/8' drill bit, using hole in hub as a guide. Install (2) Monel cotter pins thru holes in hub; one from each side of the hub. Cut the cotters to fit and spread inside the nut. Carefully line up pivot pin holes in hub and blades. Important note: One blade and one ear of the hub clevis are marked 'I' and should be assembled with both marks on the same side to insure proper balance. Install Monel pivot pin, and lock it in place with the remaining (2) Monel cotter pins.

(Please note this is an option only - not a mandatory part of the installation) Apply a small amount of medium grease (marine/trailer bearing grease) on the pivot pin and on the blade flats (where the blades make contact with the hub) at the time of installation. Important to remember - Always mark your shaft from inside the boat, with the pivot pin in the vertical position (make sure you do this on both sides of the shaft) OPERATING INSTRUCTIONS Forward Engage only at idling RPMs. Damage may result if gear is engaged at much over 600 propeller rpm. Reverse Simply engage reverse and then increase throttle as much as required. Racing Manually rotate the shaft to the best sailing position, where the previously marked pivot pin is vertical. MAINTENANCE INSTRUCTIONS Inspect all cotters at each haulout.

Only replace with Monel cotter pins! We recommend that Martec refurbish your propeller within approx. Naruto Generations Keygen Download Cs6. The cost is nominal and it will add years to your propeller's lifetime.

See our for a cost schedule for this service. We further recommend the use of Martec's streamlined zinc in conjunction with any low-drag propeller to minimize drag and turbulence. Martec zincs, Monel cotters, etc. Can be purchased directly from Martec Eng.

Dear Boat Doctor, In your March column, you provide solace to Richard Riley regarding the use of folding props but you don't really solve his problem. I've used a Martec folding prop on my boat since the early 1990s with no problems. The only 'trouble' you can have with a folding prop is if fails to open, and there are a limited number of reasons why this can happen. One is stiffness or corrosion in the pivot, for which disassembly and cleaning is the answer.

The other is wear-folding props have moving parts so wear is an issue. In the case of the Martec, when you pinch the blades closed they should not touch. There should be a minimum gap of quarter inch between them.

If the blades touch, or worse, you can wiggle the closed blades back and forth, the stops are worn and the prop needs to be reconditioned. For a nominal fee Martec will weld new stops on the blades and the prop should work like new. This is a lot better than paying hundreds of dollars for a whole new prop. Wayne Simpson Brick Township, New Jersey Dear Wayne, Thanks for the tip, I did not realize that Martec (www.martec-props.com, 562-435-4494) offered this service. I spoke to them and got clarification on the service and the costs. The representative from Martec tells me they expect a prop to last between five and 10 years before needing service, depending on use and conditions. There are essentially two ways the props wear-the open and close stops as you described and the pivot pins themselves get loose and out-of-round.