The advantages of a sterndrive over an outboard engine are sterndrives have more horsepower and allow for a more attractive transom as the engine is hidden beneath the boat. One of the best ways to minimize major damage, is to use zinc anodes. There are also more components in the water which are exposed to corrosion. I might go back out this evening and see what she can do for a few seconds. Kiekhaefer introduced a MerCruiser outdrive in 1961 at the Boat Show. I just wanted to calculate the theorteical speed of potential props compared to what I have now. This is due to the potentional corrosion issue.
The advantages a sterndrive has over an inboard are sterndrives have no need for a prop shaft or rudder system making it easy to trailer and operate in shallow water. That was the original concept, nowadays there are outboards made as large as 200 hp, maybe more. Both have pros and cons and are two completely different machines. Sterndrives also allow for more space in the interior passenger cabin of the boat as the engine is mounted all the way in the back of the boat. The out board contains the shaft and prop together with the motor in a self contained unit. The propeller then pushes the water past the turned rudder and turns the boat.
It is an expensive investment and it is worth taking your time choosing the best model for you. No matter what type of boat you have or choose to purchase, are compatible. There are hoses, rubber bellows and oil lines in the water which can be damaged. V-Drive Inboard engines are most commonly found on watersport boats making it easy to wakeboard, wakesurf, tube, kneeboard, and anything else you want to try behind the boat, including skiing. Thanks agian for your help on everything. The input shaft on the 1.
Boat zinc anodes are required on the drive shafts to help reduce corrosion on shafts and propellers. While sterndrive engines are not as readily removable as smaller outboards, larger outboards which combine both large powerheads and outdrives are bigger, bulkier, and heavier than separate engine and outdrive components on sterndrives. Inboard boats usually also produce less wake and are a popular choice for those who like to participate in. From the way she feels. Direct Drives are used specifically for ski boats as they leave very little wake. Re: What gear ratio is my outdrive? If you're new to driving a boat, there is a considerably larger learning curve in maneuvering and trailering an inboard boat.
With mostly positive attributes, outboards do lack power and torque. Less than that you will have a tug boat prop. It will need to be replaced often and the use of an speciaty antifouling outdrive paint for boats. It's just my nature to hypotosize and question. Because of their practical advantages and attractive cost, sterndrives have become extremely popular especially for use in pleasure boats, and there are many models of boats for which sterndrive power is the only available propulsion offered.
Outboard Propulsion Systems Outboard propulsion systems have a unit mounted externally to the rear of the boat that contains the engine, gearbox, and propeller. Advantages of the sterndrive system versus inboards include simpler engineering for , eliminating the need for them to design propshaft and rudder systems; ease of trailering and shallow water maneuvering with the drive trimmed up ; also, a significant space savings with the engine mounted all the way , freeing up the boat's interior volume for occupancy space. Your choice on any engine drive should be based on an individual boater preferences and how the boat will be used. In comparing inboards to the alternatives, inboard boats are easier and cheaper to maintain, have a lower center of gravity for better handling, and have a cleaner transom. In order to get the power an inboard engine produces, there must be multiple outboard engines mounted on the transom. It also allows smoother rides when trimmed up.
The outdrive is pivoted up for trailer travel and between uses to avoid fouling. I went from a 27 year old 305 to a brand new 350 and I haven't chaged the prop yet so I hope I'm under propped. I'd also guess that the higher the ratio, the slower the gears inthe outdrive turn, the less ware there is on the outdrive. Sterndrive engines are similar to those used in true inboard systems. If you are buying a used boat and motor, inspect the motor yourself and ask for previous maintenance records. Engineering and trial and error Heavy on the trial and error was how it was done back in the 50's and 60's when outdrives first came on the scene.
In Europe diesel engines are more popular, ranging up to 400 hp in models such as the D6A-400. You can figure which ratio with the drive off the boat by turning the input shaft until the prop shaft makes one complete turn. I don't claim to know much outside of my natural sciences background. With both inboards and stern drives there is a fire and explosion hazard from gasoline fuel vapors within the engine compartment. The boat is steered with a rudder when the steering wheel is turned by the captain. There was also the O. While sterndrive engines are not as readily removable as smaller outboards, larger outboards which combine both large powerheads and outdrives are bigger, bulkier, and heavier than separate engine and outdrive components on sterndrives.
You will be able to pull anything, but you won't be able to pull it very fast without going to the 10,000 rpm range and the engine ain't going to like that. The drive unit is both the transmission and propulsion. It can also be rotated up to prevent the propeller from striking anything in shallow water and to allow the boat to trailered more easily. The outdrive is pivoted up for trailer travel and between uses to avoid fouling. With both inboards and stern drives there is a fire and explosion hazard from gasoline fuel vapors within the engine compartment. Re: What gear ratio is my outdrive? The engine sits just forward of the transom while the drive unit outdrive or drive leg lies outside the hull. On the other hand, inboards will hold a speed more easily than a sterndrive.