![]() ![]() Unfortunately, the forces of debris entering the pump often causes this protector to fracture and break apart, thus contributing to cavitation. This free spinning sheath is intended to make it easier to remove ropes that might get wrapped around the drive shaft. If your wear ring is damaged in anyway, it’s cost effective to replace it.and then stay away from rocks.ĭrive shaft protector - The 14.5's come from the factory with a white plastic sheath that slips over the drive shaft. The end result is reduced pump thrust, and reduced fuel range. In addition to the cavitation, a damaged wear ring reduces pump efficiency in a way that can cause the engine to run a few 100 rpm higher than normal (for any given speed). However there can be considerable cavitation if the wear ring is gouged or grooved (as can happen from digestion of rocks or branches). In a perfect world, this ring has no grooves or gouges on its surface, and it fits closely to the impeller’s outside diameter. Wear Ring - The wear ring is a removable Teflon plastic liner that the impeller spins within. This inexpensive foam ring assures that there are no unknown gaps in the crucial sealing surface between the pump case and the pump shoe. We recommend This procedure for "every" single motor 14.5.Īs added insurance to sealing between the pump shoe and pump case, we recommend a foam pump sealing-ring (available from the SD dealer). It is impossible to over emphasize the absolute importance of have this area attended to. Once off, all surfaces must be completely cleaned of the old sealer. Removal of the pump shoe is difficult (usually done with a hydraulic jack between the plate and the rear swim step). The pump shoe/ride plate "must" be removed and resealed using "Permitex 66c Industrial Clear Silicone" (available in auto parts stores). On these units, no kind of custom prop, etc, can eliminate the cavitation. Many of these shoes came from the factory with breeches in the silicone that sealed them to the hull. Herein lies a lot of the cavitation problems experienced by many 14.5 owners. ![]() ![]() It is "fundamental" that this shoe/ride plate is perfectly sealed to the hull with a high-grade silicone sealer. In the case of the 14.5's, the shoe and the ride plate are made as one piece. Pump Shoe - The pump shoe is the actual metal part (bolted to the hull) that the pump body seals up against. Here is a interesting link for single engine seadoo jet boats. ![]()
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