Comparative characteristics of Mercury Optimax135 hp and Honda130 hp

Silent four-stroke Honda engine is famous for safety and adherence to tradition. More noisy but even more sporty Mercury engine shows its advantage in terms of efficiency thanks to the newest injection system.

Specifications: The optimal effect for OPTIMAX Engine

As for speed, the two-stroke engine is always superior to a four-stroke, and the application of direct injection systems only aggravated this state of affairs. As a result of the timing Optimax engine was more rapid units against 37.35 29.75 knots at maximum capacity (+ 27%). It must be said that his screw with a pitch of 19 inches is specially designed to achieve high speeds.
This advantage applies to all modes ranging from 2000 rev / min. The difference more clearly deepened during the tests to achieve a given speed to zero: + 89%! Thus, Optimax engine designed for sports boats is not less than six meters in length, while the engine Honda, the technical characteristics which the firm has never concealed, will be installed on the rear of the boat and boats designed for fishing and walking or for day family output in the sea.

At the start of the Optimax boat leaves behind a Honda engine as if she stands still. The latter, however, develops a solid enough top speed.
Everything is in the fuel supply system

Direct injection two-stroke engine

Mercury Company uses model Optimax (2504 cm3, 6-cylinder with a V-shaped arrangement) patented Orbital system based, in a nutshell, on the injection of the correct dose of the fuel-air mixture in the combustion chamber. Electronic brain exercises will eat testimony. To do this, the engine is equipped with the necessary devices: never and no one has yet seen the outboard with so many details.

Indirect injection for four-stroke engines

The company Honda has always prefers to act as simple as possible: she took the drive from the engine block of the car Accord (2254 cm ?, 4-cylinder) and adapted it to the marine environment (in different versions). To achieve maximum technical performance, less pollution and provide even higher reliability, it equips its system of so-called indirect multipoint injection, which is located in the intake pipe. This system is patented by Honda.

Fuel consumption: moderation legendary Honda Engines

More overall and heavy four-stroke engines, however, have one important advantage: they burn a little fuel. Honda Engine 130 BF this principle remains true, consuming no more than 44 liters / hour at maximum capacity and 15 to 20 l / h on a walking mode. For engine capacity of 2254 cm3 and a power of 130 hp These numbers represent flattering, but logical. However, Mercury Optimax engine is also not born shit: its volume slightly larger, but the results are close enough to the characteristics of the engine Honda - that is, the flow rate is between 16 and 21 l / h, that in all modes at 2 ... 5% higher than the rate of the Japanese engine except for the last 500 rev / min when the injector descends like a chain 60 l / h.

Thus, it is proved that the electronic engine management (by the example of our two duelists) and injection of the correct dose of the fuel-air mixture to achieve major savings. One piece of advice: use fuel containing no lead, and set between the tank and drive filter.

Efficiency: the advantage of the Americans

We remind well-known formula: the speed / flow rate = distance in miles per liter. In this game, is to maximize autonomy in rotation speed range from 1000 to 4000 rev / min, i.e., at economical cruising modes overcomes Optimax engine. At a higher speed of rotation of its curve almost coincides with the curve of the engine Honda, which, we note, has a smoother appearance. Mercury engine reaches its maximum efficiency at 3000 rev / min at a speed of 18 knots, immediately after the start. Both motors should be noted that at a rotational speed exceeding 4500 revolutions / min results can be attributed more to a secondary consequence of incomplete combustion gas. Fans Squeeze the handle until it stops must remember this.
Swimming: Japanese prudence or American swiftness?
If silence - gold, then the Honda engine is made of platinum, so it is silent. What comfort during its operation! He has the time to low power, which allows for a very high maneuverability. When you are out at sea, you just cross your fingers and turn on full acceleration. It increases its power smoothly, but this does not mean that it does so slowly. It is adapted to the style of swimming in the open boat Key Largo. Sport Optimax also goes well with this boat.
First he breaks sharply from a place (it should evaluate the water skiers), and then proceeds to a smooth mode. What a pleasure to write on water different patterns! Now let's compare the reaction of our duelists at the same speed. At the 4-speed drive unit is equal to the rotation speed: Honda - 1250 rev / min at a constant flow rate of 6.5 l / hour; Optimax - 850 rev / min at a flow rate of 3.81 l / h. At economical cruising speed rotation Sessa model 20 knots speed drive is equal to: Honda - 4250 rev / min, at a flow rate 26 l / h; Optimax - 3250 rev / min at a flow rate of 18 l / h. At high speeds of 25 knots, required for water skiing, the drive rotational speed is: Honda - 5250 rev / min, at a flow rate of 40 l / h; Optimax - 3350 rev / min at a flow rate of 25 l / h.


We caution that were carried out and other tests using a different motor boats and other types of flowmeter. The results were even more convincing. However, our tests all retain their meaning. Each of these motors has its own particular program, and therefore, they may not necessarily be used with equal effectiveness for various purposes.

Basic data Class High Power motors


Honda 130

Mercury Optimax 135


2254 cm3

2507 cm3

Weight, kg



Generator system

40 A

60 A

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