One twice the area of the mount, and the second one 4 times the area of the mount. The large one goes inside the transom and the smaller one on top of the first one. Sand/grind the inside of the transom to clean the surface and expose the fibre-glass. Here's how I'd do it. Take the bolt pattern of your OB mount and find the area of the mount base at the transom. Make two motorboard pads out of 3/4" ply. Will your DIY transom mount OB pass a survey? If not, you can't give the boat away. Now how much money have you "saved"? Will the OB draw fuel that far? When you go to sell the boat, the new owner will want/need a survey to get insurance.
#TRANSOM PROTECTOR FOR OUTBOARD MOUNTING WOOD RUNABOUT PORTABLE#
Your fuel usage will be less than 1/2 of the OB. With the OB you also get 6 gallon portable tanks unless you use the gas tank that is inside the boat. And that's assuming that it has a voltage regulator that will put out 6A for 10 hours. ĺ 15-20 hp diesel will spin a 75A alternator and charge your battery in less than 1 hour. The inboard diesel will sip fuel rather than gulp it.
Transom mounted OB's put weight where you don't want it, either when motoring in waves or sailing. Transom mounted OB's pull the prop out of the water when motoring in rough weather, inboards do not. Inboards have real alternators, how are you going to charge the batteries? Your 9.8 HP Nissan has a 6 amp alternator, just big enough to keep the starting battery charged. If you have only one 100ah battery for the house bank and start to charge at 50% discharge, your 9.8 Nissan has to run for almost 10 hours to charge the battery. Visiting tourists and travellers enjoyed the idea of flat-bottomed boats, as they could fish standing up and did not have to fear tipping over.I hope you never have to use the motor on anything but calm days. I hope you don't have a battery to charge. I hope you don't mind killing the resale value of your boat. The C27's that were built for OB power don't hang the OB off the transom. These vessels were found useful for float fishing, duck hunting and carrying timber. In the late 19th century flat-bottom boats became popular in The Ozarks, being ideal for traversing the shallow waters in the Missouri Valley. The Wasserwacht branch of the German Red Cross has chosen jon boats for their civil protection units for use during floods. Many users choose to cover the ribs, producing a flat, level surface. The simple design includes an open hull, without a bilge, leaving the ribs exposed. Jon boats are available commercially between 8 and 24 feet (2.4 and 7.3 m) long and 32 to 60 inches (81 to 152 cm) wide, though custom sizes may be found. Typical options may include live wells/bait wells, side or center consoles, factory installed decks and floors, electrical wiring, accessory pads/mountings, and casting and poling platforms.
They are simple and easy to maintain, and inexpensive, though with many options to upgrade. Jon boats typically have a transom onto which an outboard motor can be mounted. The nearly flat hull of a jon boat tends to ride over the waves rather than cut through them as a V-hull might this shallow draft – only a few inches – enables the jon boat to operate in very shallow water, but limits its use to calm waters. They are suitable for fishing, hunting and cruising. A small modern jon boat in the bed of a pickup truck.Ī jon boat (or johnboat ) is a flat-bottomed boat constructed of aluminum, fiberglass, wood, or polyethelene with one, two, or three seats, usually bench type.
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