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General Information about Outboard Engine Brackets
Why does it make sense to install a positive floatation engine bracket?
- It creates more room in the boat by moving the outboard engine behind the transom.
- Longer force arm gives the boat easier handling.
- Longer force arm also means a better "hole shot" - shorter time to plane.
- The propeller works in a less disturbed water flow, further behind the transom, which
results in better efficiency; this means better fuel economy, and a bit more speed.
- Integral transom platform allows easier boarding.
- The positive floatation chamber fully compensates for shifting the engine weight aft, and
can even add a little extra buoyancy, if required.
- It is important not to confuse an offset engine bracket, as it is described above, with a
bottom extension bracket, which has some of the same advantages, but not all. Since
the bottom extension adds more wetted surface, it creates additional friction drag. In an
offset bracket, when the hull is planing, the bracket does not touch the water.

Pricing
Advantages of our engine brackets.
- Rather than building the brackets and shipping them around the country, or the world, we
design the bracket to your specific requirements, and provide you with a documentation
package that enables your local aluminum fabricating shop to make the bracket for you,
which eliminates a fairly high cost associated with shipping of the ready made bracket,
purchased from a business, say, in Florida, if you live in Seattle; not to mention the
headache of returning it to the manufacturer in case of a problem.
- Our brackets are designed to perform their job as well or better than competition, while at
the same time being easy to assemble without the need for CNC cutting, or break press
work. The only requirement is a good practical knowledge of aluminum welding.
- Before being offered as an accessory to enhance the performance of your boat, we
tested the concept and the structural design of the brackets in our Tuna line of boats
which utilize the bracket concept.
- Thanks to the advanced parametric software we use to build our 3D models, we can offer
a much wider range of custom adjustments, than any competitor, resulting in optimal
match of the bracket to the hull.
- Here is the list of bracket parameters that we can custom adjust to your hull:
- Transom angle.
- Engine shaft length.
- Floatation chamber volume and shape - calculated to achieve the desired trim.
- Bracket fore and aft depth.
- Engine plate angle and shape.
- Bracket platform width.
- Bracket platform corner radius.
- Bracket platform corner tube diameter(other edge profiles possible).
- Flat or curved transom.
- Two versions: weld-on for aluminum boats, and bolt-on for fibreglass, or wooden boats.
- Single or multiple - 2, 3, 4 engines, installations.




Below is a sample design, single engine, weld-on bracket, for an 18 ft. aluminum hull, being prepared for a boat
builder in Sweden.
The bracket will weigh around 80 lb, and support a 90 HP Yamaha four stroke outboard engine.
Its floatation chamber volume will be adjusted to compensate for the engine weight shift aft, and the weight of the
bracket itself.
Check back soon, for further details, as they become available.
The price of the basic documentation package, custom adjusted to your
specific boat requirements, starts at $350 Canadian dollars, for a single
engine installation, $450, for twin.
The digital package includes:
- Construction drawings with specifications
- Pictorial(computer renderings) construction aids
- 3D interactive pdf model.
- Assembly sequence document
- Material list.
More than two engines, and custom modifications, please ask for a quote.
Click here to see a 3D interactive model of the bracket
Recent version of Adobe Acrobat viewer required.
Click and drag the left button to rotate the model, or use pdf toolbar.
The drawing will open in a separate window. Close it to come back to this page.
Click the icon on the left to
download Adobe reader,
necessary to view pdf files.