Advice 1: How to increase the power of the boat motor

If you had to choose the boat motor, then you've probably faced a situation when in the technical description of the two engines of the same working volume and weight were a different number of developing units of horsepower. The question is: how to achieve the difference in power, and whether it is possible to increase it yourself, without the horsepower?
How to increase the power of the boat motor
Instruction
1
Consider the possibility of buying a boat motor in a cheaper version and less power to themselves to alter it more powerful. Forcing basic motor with average characteristics will allow you to save money and to compensate for the difference in power.
2
Inspect your motor to determine the presence or absence of the restraining choke, check the specifications of the unit. This files most often have to be replaced flap valves, carburetor (nozzle), the exhaust manifold and the commutator.
3
To precisely determine what parts need replacement, then compare at the parts catalog set parts of your motor and the unit whose characteristics you wish to receive. So you will be able to identify the nodes that need improvement.
4
Remove the power limiter (small engines) and adjust the valve clearances. Another way to increase power motor - debugging components and parts responsible for suction and discharge. Operation to increase the power of the motor is produced individually for each type.
5
Make the bore of the carburetor of the engine by increasing the diameter of the diffuser. To do this, first disconnect from the carb spray (have to drill them over the brass tube), tube nozzle, throttle and choke cover float chamber and Unscrew the adjustment screws. The tube nozzles will be easier to dismantle by inserting in it a wire of suitable diameter. After boring reinstall the sprayer hose nozzle and other parts. Close the hole on the atomizer tube made of suitable size screw with a lock nut.
6
Ask for assistance to the mechanics of the service center if you have trouble when making design changes to the engine. So you will save time and nerves. Self-changing power of the motor can be a costly process.
Note
If you decide to increase the power of the boat motor, remember:
- extra power does not always give a tangible speed boost;
- excess power of the motor makes the ship not sufficiently stable, particularly when making sharp turns.
Useful advice
If your motor is the maximum allowable for a particular type of vessel, the Supervisory authorities will not register the unit with nominal power higher than allowed. In this case, the cost of changing power outboard motor will pay off.

Advice 2 : How to choose propeller for boat motor

For each vessel a boat motor there is an optimum propeller screw. But in the case of use of the vessel in many ways – for fishing, for exploring, towing water skiers – you will need a few screws. Be sure to purchase for your boat propeller spare propeller with fastening kit to it.
How to choose propeller for boat motor
You will need
  • - the ship;
  • - motor boat;
  • - thruster;
  • - tachometer.
Instruction
1
Define the basic parameters of a propellerfor a boat motor. They are the diameter of the screwand its pitch. From these parameters, given motor power depends on the maximum speed of the boat. The distance in inches traveled by the screw ofω in one revolution, there is the step screwand the boat motor.
2
Find it in the symbol marked on the heart of the rowing screw, the diameter and the value of the step screw. For example, the label 9,9h13 means that the propellerand outboard motor O is 9.9 inches when the step is 13 inches.
3
View the instructions for boat motor, what maximum speed it can develop into "full throttle" when the throttle of the throttle. Accelerate the boat to maximum speed. A tachometer measure the speed of rotation of the motor shaft, usually it does not exceed 5500 rpm./min.
4
Note the shaft speed at the maximum throttle. If it is less than the maximum recommended revs, the readings of the tachometer indicate the maximum speed of this type of propeller screw.
5
Calculate the step screwand the boat motor. One inch step screwand is approximately 200 rpm./min. Find the difference between the tachometer readings and the maximum nameplate rpm, divide it by 200. The resulting value divide by the gear ratio of the boat motor. If in the end you will get figure 2, therefore, for this boat motor is better to use a different propeller screwwith step 2 inches less. With the new screwom your vessel will achieve the planned maximum speed.
6
When you select the screwand to the boat motor stick to certain rules. Screws propeller with a large pitch for high-speed use light boats, and smaller increments for low-speed and heavy. Variation of the pitch of the propellerand the boat engine is the only way to align the screw with the engine and the boat.
Note
Screw with a horizontal axis it is more efficient. Have a propeller that is installed with an incline greater than 10 degrees to the horizontal, the efficiency is reduced.
Is the advice useful?
Search