What does VRO mean on a Johnson outboard?

As a boater, you may have heard about VRO or Variable Ratio Oiling system. It was introduced by Johnson outboards in the 1980s as a means to improve fuel efficiency and make the engine more reliable. But what does it actually mean?

The VRO system works by automatically mixing the gasoline and oil in the correct ratio for the engine. This eliminates the need for the boat operator to manually mix the two components. The system works by adjusting the oil flow based on the engine’s RPMs, so at low speeds there is less oil, and at higher speeds, there is more.

The VRO system also has a warning system that alerts the operator if there is an issue with the oil flow. If the warning light comes on, it is important to stop the engine immediately and check the oil level. If the oil level is low, be sure to add oil according to the manufacturer’s recommendations.

It is important to note that while the VRO system is a great convenience, it is still important to check the oil level regularly, as well as the oil quality, and perform regular maintenance on the engine. Neglecting these tasks can lead to costly repairs or even engine failure.

In addition, some older Johnson outboard models with VRO systems may have experienced problems with the oil injection system. If you have an older Johnson outboard, it is important to check with a mechanic or local dealer to see if there are any outstanding recalls or repair campaigns related to your engine.

Overall, the VRO system is a great innovation that has made boating more convenient and reliable. As a boater, it is important to understand how this system works and to perform regular maintenance on your engine to ensure it continues to operate at peak performance.

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