UGH... Why do people ask questions but not give you enough information to respond properly?
What kind of boat is it?? Does it have an outboard or in-board motor currently?
If it has an outboard motor, then whatever you buy should probably fit where the existing one was mounted. If it had an in-board, replacing it with an outboard is probably a really stupid idea.
The price of a 25 HP outboard depends on whether it is new or use, two-stroke or four-stroke, what brand, how old, etc. Google can give you a rough range of prices...
Most boats have a transom...A transom is the transverse, vertical or sloping, panel forming the after end of a boat's hull. Double-enders like canoes and peapods have no transom.
If the boat was in-board powered, and you want to replace it with an outboard, you will probably have to install an lifting motor bracket... but you will probably also have to glass over the existing shaft exit that the current propellor shaft comes out through the hull. If not, you're risking having the boat sunk when water starts coming in via the prop shaft.
Removing the old in-board engine, transmission and prop shaft, glassing over the prop thru-hull, buying the outboard and outboard motor mounting bracket, and the installation of it may be more expensive than getting the current engine re-built. It will also change the performance and handling characteristics of the boat, most likely in a negative way.
Depending on the size and layout of the boat, you may also need to purchase and install remote engine controls, as on many boats, you would not be able to safely reach the outboard motor's gear shift or throttle from the helm.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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Last edited by sailingdog; 08-27-2006 at 06:18 PM.