This is a very tricky procedure when attempting replacement of seal while boat is in water, as water will be gushing in through fitting, so make all effort to remove boat from the water if at all possible before repairs are made. A couple of things to keep in mind when changing this seal are, after loosening and retraction of the large nut that compresses the seal, and seal extraction, there is open access through the fitting to the outside of the hull. Access to this fitting is normally fairly easy, but can sometimes be hampered due to engine compartment design. See figure 1 This seal can harden and loose seal after aging and a water leak can result. The other item that might need attention is the prop shaft seal located in the fitting where the prop shaft goes through the hull. If average strain, then about once a season is adequate. If the transmission receives a lot of high strain use, the oil needs to be changed about twice a year. The frequency of oil changes depends on the severity of operation. First off, the transmission, figure 1, requires regular maintenance of oil changes. There are only a couple of items of this system that can be serviced by the average person. The main difference in the two being that a stern drive can be raised and lowered for reasons of providing a way to adjust the way the boats rides when on plane, and also the for operation in much shallower water than the inboard. Stern drives are available in a few different options to be used for small light weight, lower horsepower boats, all the way through heavy high horsepower boats. Stern drives are used for small to large ski boats, large cruisers, high performance, and heavy boats needing a heavy duty drive. Inboard/outboard applications, figure 2 use a different type of transmission called a "stern drive". These applications are normally seen in some ski boats, and some larger boats not requiring a heavy duty drive system. An inboard application, figure 1, normally contains a transmission mounted on the back end of engine, then transfers power to the propeller via a long slim drive shaft. We will be looking at propellers later in this section. Engine RPM and boat speed are altered by changing propeller type and pitch. Both systems act as transmissions and provide forward, neutral, and reverse only. Inboard and inboard/outboard boats basically use two different applications of drive systems. Johnson Evinrude Mercury Mariner Force Chrysler Yamaha Mercruiser OMC Cobra Competitive pricing with volume and marine trade discounts in addition.Stern drive boat motor drive types and operationĭIY inboard outboard boat motor parts & accessories.Experienced staff can help you identify the right part.A next day courier service to most areas for unusual parts.Huge stocks of genuine outboard motor parts for immediate delivery.If you're after genuine outboard spare parts for Yamaha, Evinrude, Johnson, Mercury, Mariner, Force, Mercruiser or OMC Cobra then Hunts Marine's Spare Parts Department is the place.
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Aluminium - Welded repairs and custom mods organised.Fibreglass - Gelcoat repairs and restoration done.Upholstery - Torn or worn upholstery? Ask about vinyl repair and rejuvenation.Canopy - Need a cover, canopy, bimini or side curtains? We install, modify and repair.Electronics - Your radio, fishfinder, GPS, stereo or 12V gear installed and tested.Steering - Mechanical or Hydraulic? Parts available and complete systems installed.Battery - We supply, test & service marine batteries.All our mechanics are factory trained and we have all the latest tools and software.Ĭall Sydney on 9546-1324, or Wollongong on 4284-0444, or Batemans Bay on 4472-2612.Ĭlick here for the online spare parts library.Ĭlick herefor service kits, service items and all oils.Ĭlick here for our pre- purchase inspection service.ĭid you know that Hunts can help you with your boat's. When it comes time to service your outboard or sterndrive it's worth calling Hunts Marine. If you are looking for outboard spare parts, use our online shopping cart and catalogue below or call (02) 9546-1324 Hunts Marine offer quality servicing and genuine spare parts for the brands of Evinrude, Johnson, Yamaha, Mercury, Mariner and Mercruiser.
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