Before you buy a propeller for an outboard motor, you need to have some knowledge about its parameters and component parts. For example, the diameter, which means the circle that the blades describe.
Another property to consider is slippage. This characteristic appears due to the draining of water from the blades and displays the difference between the actual pitch of the screw and that given in the passport. The efficiency of the motor directly depends on slippage. The lower this indicator, the greater the efficiency.
Under normal conditions, slippage should not exceed 18%. Below are recommendations that will help solve problems associated with engine speed (when the actual number of revolutions differs from those indicated in the passport).
And also do not forget about the disk relationship. This term refers to the relationship between the areas of the blade and the described circle.
And, of course, the most important parameter is the pitch of the screw. From this characteristic will depend on the load that is supplied to the boat motor and, accordingly, to the propeller. That is, there is a linear relationship: the larger the step, the more the motor will generate revolutions, and, accordingly, the greater the speed of movement. In this case, the diameter of the screw assembly will decrease in proportion to the step size. This means that the larger the last, the smaller the first.
So, as promised, consider a solution to fairly common problems. What to do if the actual number of revolutions is greater than the value indicated in the passport? Need to increase the pitch. If you increase it by 2.5 cm, the speed reading will decrease by 200 units. If the real speed is lower, then you need to do exactly the opposite.
There is a company called Michigan that manufactures off-standard propellers. The blades made by this company for outboard motors differ in such parameters as diameter and disk ratio. Use of this product is advisable only after consultation with specialists.
Next, recommendations will be made that contribute to increasing the stroke on the glide, as well as reducing the speed of gliding.
When choosing a propeller, you should consider the disk ratio. For example, products from Michigan Wild blade are able to increase the disk ratio with the least loss of speed. It should be noted and 4-blade propellers Solas. According to their characteristics, these nodes will allow to reduce the speed when the motor will produce maximum speed.
Well, if you want to experience the maximum speed of your transport, then you can use the following tips. First of all, it is better to use stainless blades. And the best thing is that the motor unit is still ventilated and polished. This combination of parameters provides a significant increase in speed.
Also, fans of high speed and fishing walks on the rivers will be interested in such a propeller as Michigan Ballistics. With it, you can increase the efficiency to the maximum. This is done thanks to the 3-blade system.
Thus, following modest advice, you can understand the assortment of goods on offer and choose the propeller that is right for you.