Hvort er betra, tveggja-gengis eða fjórgengis-gengis fyrir utanborðsmótor?

There are many brands of outboard engines. There are domestic and imported brands. In addition to the brand and price, we have to consider which model is more suitable. Then, which one should we choose when purchasing? We have summarized the following aspects for you to compare.

1. Quality and structure   In terms of machine workmanship, the structure of the two-stroke machine is simpler and saves a lot of parts than the four-stroke machine. In this way, the two-stroke outer machine with the same horsepower is lighter, which means that the four-stroke machine is more compact than the two-stroke machine. The stroke outer machine is heavier, and the two-stroke outer machine is more convenient to carry. 

2. Adding gasoline and engine oil 

Two-stroke machines require a mixture of gasoline and engine oil, that is to say, gasoline and engine oil are added together in the fuel tank. Two-stroke outboard engines do not have special oil filling holes and do not need to be filled with engine oil for lubrication, but are lubricated during combustion. The mixing ratio of gasoline and engine oil during the running-in period is    (gasoline: engine oil=25:1 ), usually to facilitate start-up, the ratio can be adjusted to 30:1 . After the running-in period, the adding ratio of gasoline and engine oil is (gasoline: engine oil=50:1) ). The four-stroke outer machine is more like the engine of a car. There is a special oil filling hole to add an appropriate amount of oil for lubrication, and the waste oil is drained every other time, and new oil of the same model is injected to ensure the high performance of the machine. 

3. Fuel economy type If the ship machine is used for work or operation, or it takes a long time every day, then a four-stroke machine with the same horsepower will save about 30 percent fuel than a two-stroke machine, that is to say, the more you drive The four-stroke machine is more fuel efficient. And from the perspective of environmental pollution, due to the simple structure of the two-stroke machine and insufficient fuel combustion, the residual degree of exhaust gas emitted is higher, which is not conducive to the current environmental protection.

4. Noise and jitter Due to the different ways of working and exhausting, the noise and jitter of a two-stroke machine of the same brand and horsepower are slightly larger than that of a four-stroke machine. In addition, the sound of the four-stroke machine is small and deep and better to hear. Due to the simple structure of the two-stroke machine, the two-stroke machine is more explosive, and has higher acceleration and flexibility. However, as technology continues to improve, the difference is gradually decreasing.

5. Maintenance and maintenance Due to the simple structure of the two-stroke outer machine, the number of parts used inside the outer machine is far less than that of the four-stroke outer machine, so the two-stroke outer machine is more convenient to maintain and the repair cost is relatively low. Experienced technicians in general motorcycle repair shops can handle two-stroke machines.

6. Miðað við verð er fjögurra- ytri vél af sömu tegund og sömu hestöfl dýrari en tveggja-gengis. Ef það er ekkert vandamál með fjármögnun, þá er mælt með fjögurra-takta vél. Ef það er aðeins notað í afþreyingarverkefni eins og veiði og er notað stundum, þá er mælt með tveggja-útivél.