Outboard Accessories

Outboard Accessories and Equipment. The two most important factors to understand about jetboat performance are bottom width and the weight- to-power requirements for bringing the craft on plane. These fundamentals are derived from physical laws of water displacement and force.

If you view these ideas with accesorios nauticos online an open mind and are willing to set aside some of the unquestionable ideas you may have heard, you may learn something new in enhancing the performance of your outboard jet, as I have learned in gathering this information.

Cavitation problems

Outboard jets work best on flat-bottomed boats with a bottom width of 48 inches or more. This is a frequently used axiom, and has led to a lot of misconceptions. The shape of the hull cannot be easily defined. Fact is, when it comes to bottom width, the wider the bottom, the more water it displaces. Because a shallow draft is important, the wider the boat, the better the draft. A wider hull sits higher in the water, so it exhibits less drag when jumping on plane. Conclusion: Wider is better.

The rest of this statement, however, is not entirely true, even if the vast majority of the boats I see on Pennsylvania rivers are flat-bottomed boats. The shape of the hull helps direct the flow of water. Flat hulls tend to cause more cavitation.

It doesn’t matter which outboard you purchased, if it has a jet attached to the lower unit, it was manufactured by Outboard Jet, a division of Specialty Manufacturing. Outboard Jet publishes a guideline for selecting a boat powered by an outboard jet. The company suggests that a boat hull offering a slight deadrise (6 to 10 degrees) increases the overall performance. The hull maneuvers better and cavitates less than a flat-bottomed boat.

Many aluminum hull manufacturers have introduced a whole new line of extra-wide modified john boats that offer a consistent line of 4 to 6 degrees of deadrise from bow to transom. It is important that the deadrise falls all along the hull because the “V” provides a smoother ride and splits off air-filled water before it reaches the jet intake.