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Comparison Fisher T2,5CBMS vs Fisher T2.5BMS

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Fisher T2,5CBMS
Fisher T2.5BMS
Fisher T2,5CBMSFisher T2.5BMS
from $313.20 up to $324.12
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from $248.00
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Applicationboatboat
Motor typepropellerpropeller
Motor
Engine typepetrolpetrol
Motor duty cycle2-stroke2-stroke
Maximum power2.5 hp2.5 hp
Maximum power1.8 kW1.8 kW
Maximum revolutions5300 rpm5000 rpm
Number of cylinders1 pcs1 pcs
Capacity50 cm354 cm3
Piston diameter42 mm44 mm
Piston stroke36 mm38 mm
Coolingairair
Exhaust systemabove propellerabove propeller
Fuel system
Fuel system typecarburetorcarburetor
Fuel tankbuilt-inbuilt-in
Fuel tank volume1.2 L1.1 L
Recommended fuelAI-95 gasolineAI-95 gasoline
Drive unit
Gear ratio2.082.08
Propeller screw3-bladed3-bladed
Gear
forward
forward
Equipment
Transom height (deadwood)381 mm381 mm
Control systemtillertiller
Launch typemanualmanual
Leg lift (trim)manualmanual
General
Weight9.8 kg9.8 kg
Added to E-Catalogapril 2016february 2015

Maximum revolutions

The highest shaft speed that the outboard motor is capable of developing.

Theoretically, the speed of rotation of the propeller (or turbine — see "Motor type") depends on the engine speed, and, accordingly, the speed that the boat is capable of developing. However, in addition to this indicator, many other factors also affect the performance of the motor — engine power (see above), gear ratio (see below), propeller design, etc. As a result, situations are quite normal when a more powerful and high-speed motor has lower revolutions than the weaker one. Therefore, this parameter is, in fact, a reference one, and has almost no practical value when choosing. Unless it can be noted that high-speed motors are more susceptible to noise and vibration than low-speed ones; however, this moment can be compensated by the use of various technical tricks.

Capacity

The working volume of a gasoline outboard engine (see "Engine type"). This term usually means the total working volume of the cylinders.

The larger this value, the higher the motor power, usually (see the relevant paragraph). At the same time, with an increase in the working volume, fuel consumption, weight and dimensions of the unit also increase; and power depends not only on this indicator, but also on a number of other factors — ranging from the number of strokes (see "Engine duty cycle") or the presence of turbocharging (see below) and ending with specific design features. Therefore, situations are not excluded when a smaller engine will have more power, and vice versa.

Piston diameter

The diameter of a single piston in a gasoline (see "Engine type") outboard motor. In most cases, this parameter is purely reference; situations where data on the piston diameter is really needed are extremely rare — usually during the repair or maintenance of the engine.

Piston stroke

The working stroke is the distance between the two extreme positions of the piston in a gasoline (see "Engine type") outboard motor. In most cases, this parameter is purely reference; situations where such data is really needed are extremely rare — usually during the repair or maintenance of the engine.

Fuel tank volume

The total volume of the fuel tank provided in the design or delivery set of the outboard motor (depending on the type of tank — see "Fuel tank").

The larger the capacity of the fuel tank, the longer the engine will be able to work without refueling, the less often it will be necessary to replenish the fuel supply in the tank. On the other hand, volumetric tanks have appropriate dimensions and weight, especially when filled; the latter is especially critical for motors with built-in tanks (see above).
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