What does VRO mean on Evinrude outboard?

What does VRO mean on Evinrude outboard?

Variable Ratio Oiling
Sorrry, couldn’t resist, it stands for Variable Ratio Oiling. Basically it works like most two stroke oiling systems by varying the amount of oil needed to mix with the gas for your motor.

How do I test my Evinrude VRO?

Start the engine, and monitor the pump cycles by using a fuel pressure gauge or by putting light finger pressure on the outlet hose.

1. At 800 RPM, the oil level in the hose should drop 1″ in approx. 5 pulses.
2. At full throttle, the oil level should drop 1″ in approx. 3 pulses.

What year did Evinrude introduce VRO?

Also, the ratio could be made variable to allow for different lubricating needs based on engine throttle setting. OMC introduced an oil/gasoline mixing system for their outboard motors in c. 1984, and called this feature a Variable-Ratio Oiling system or VRO.

What does a VRO pump do?

The travel of the air motor pumps the fuel and the oil together to the carburetors and the alarm system monitors the oil pressure counts. Just like manually premixing the oil and gas, the VRO (OMS) automatically does the same thing and sends that fuel mixture to the carburetors.

Do you need a manual for an Evinrude outboard motor?

When performing service, maintenance or repairs to your Evinrude outboard motor, always use a repair manual. It’s impossible to service a motor without a manual handy. Incorrect repairs to an outboard motor can cause sever internal engine damage, violent and damaging short circuits or severe electrical shocks.

What kind of lubricating system does Evinrude use?

To cover the Evinrude outboard motors, paint Deep Guard is used. In addition to its attractive appearance, it provides protection against corrosion. The lubricating system with directional injection protects the working cylinders for a long time, which ensures reliable operation of the power plant.

What should be included in an eninrude repair manual?

Each Eninrude repair manual contains detailed information telling how the motor should be fixed. It contains part removal, disassembly, cleaning, assembly and reinstallation procedures. Pictures, electrical schematic diagrams and illustrated part breakdowns are included in the manual to help the mechanic complete the repair job successfully.