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CHOPPER 2 PROPELLER ON YAMAHA FULL
CHOPPER 2 PROPELLER ON YAMAHA FREE

Sometimes you can’t hear the prop slip, however, which is why the GPS is helpful.

If you hear a slight change in pitch in the sound coming from behind the boat, the prop could be starting to slip, and your speed may drop by 1 or 2 MPH.

CHOPPER 2 PROPELLER ON YAMAHA FULL

Run the boat up to full throttle and then very gradually add trim, just bumping the trim button with your thumb, and watch the boat speed.

This is easy to see with a GPS speedometer or any device with a GPS-generated speed display. Engine RPM might keep climbing, but speed will start to go down. But if you just trim to the limit you could be over-trimming, and actually losing top speed.Īs you trim out the drive, the prop gets closer to the surface of the water and will eventually ventilate, or become contaminated with air, and loose its grip on the water. Trimming out the sterndrive or outboard lifts the bow, reduces the wetted surface of the hull and thus drag, and increases speed. The old racer’s motto when in doubt trim it out is true up to a point.

Try to place heavier items you do want to keep on board, like a spare propeller, in an aft storage compartment so they are not weighting down the bow.įinally, on those days you want to run as fast as possible, drain the fresh water and holding tanks if your boat is so equipped, and head out with less than a full tank of fuel.

It may also be more responsive to trim, which can further reduce drag.

A lighter boat will accelerate more quickly and run with reduced drag because the hull rides a little higher in the water.

The spare cooler, the extra fishing rods, the old bottles of sunscreen, the extra towels-each item may not weigh much but together it all adds up. We’ve seen boat owners jettison 250 pounds of “stuff” they didn’t really need on board.

Start at the bow and work your way back, clearing out every storage compartment, and then put back only the essentials.

CHOPPER 2 PROPELLER ON YAMAHA FREE

Reducing weight is like finding free horsepower, and many boat owners are surprised how much weight they can leave on the dock. A four or five-bladed propeller is good for anyone who spends a lot of time up on plane as they give more acceleration and lift so you can get on plane faster and save your fuel for fishing.Now, let's dive into the details of each of these techniques. Choosing a PropellerĪlways choose a propeller based on your needs. Mercury's Flo-Torq hub system responds similarly, giving way on impact so as to save your expensive engine and propeller from damage. One of the traditional advantages of the softer aluminium propellers is that they absorb impact, so that hitting a bank doesn't destroy your lower unit or expensive stainless steel propeller.

One advantage of Mercury is the Flo-Torq hub system. At the same time, three-bladed boat propellers offer the best overall balance of top speed and overall performance. It's also better when your boat is up on plane because no matter what happens you will never have only one blade in the water with a four or five-bladed propeller. The more blades your propeller has, the quicker your boat will accelerate. At the same time, the lower cost of aluminium propellers means that there are far more options available than there are with steel propellers. Steel propellers also support venting, which can also improve overall performance. This means steel propellers flex less so they provide more speed for the same HP engine. Stainless steel is both stronger and more corrosion-resistant, but also more expensive. Aluminium is light and strong, and makes an excellent choice for most boaters. The two most common materials for marine propellers are stainless steel and aluminium.

Choosing the right propeller is a matter of knowing your needs and knowing how a propeller can meet those needs. Mercury Marine propellers have been putting power to the waves for years and are the perfect complement to any Mercury outboard.

It transfers the power from your engine to the water.