EXAMPLES OF HOLDING BLOCK INSTALLATIONS

HEIGHT OF HOLDING BLOCK SHOULD BE APPROXIMATELY EQUAL TO WEDGE HEIGHT OF STATIONARY CUTTER.

PURPOSE OF WEDGE HOLDING BLOCK

1. The wedge holding block, being firmly attached to the strut, provides the means for holding the corresponding wedge that makes up the forward part of the stationary cutter.

2. When a line is caught between the stationary cutter blade and the rotating cutter blade (attached to shaft), the wedge forces the two blades tightly together, overcoming the resistance of the bearing and instantly cuts the line. Normally the stationary and rotary blades never touch; they are held apart by the wear bearing which purposely isolates the metals.

MOUNTING THE WEDGE HOLDING BLOCK

1. The wedge holding block is mounted onto the stern bearing tube or strut and held by stainless steel screws (provided with cutter). Holes are to be drilled and tapped to receive these screws. The holding block is to be used as a template when drilling and tapping the mounting screws.
2. The wedge holding block is to be mounted on the same side of the strut as the rotation of the propeller.
EXAMPLE: If there is a right hand prop, the holding block would be mounted on the starboard side of the strut; on a left hand prop, it would be mounted on the portside of the strut.
3. Holding block must be positioned to accommodate the stationary cutter wedge, with the stationary cutter wedge entering only one-half way into the V of the holding block. This is important to assure enough clearance to move with shaft and avoid bottoming in holding block V. If the male wedge of the stationary cutter touches the bottom of the female wedge holding block during forward end play, this will force the cutter blades together grinding metal on metal, causing the blades to be destroyed through excessive friction.

*See more information regarding holding blocks on addendum page

Marine Manufacturing Inc.
201 SW 33rd Street Ft. Lauderdale, FL 33315 USA
E-mail: spurs@spursmarine.com
phone: (954) 463-2707 Fax: (954) 525-0239
spurs cutters are protected by USA and International patents
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