September 30, 2014
Every 2-stroke engine burns oil and gas; this causes an oil vapor to escape into the muffler. If the engine is not ran at the RPM range that the unit is designed to be ran at, the muffler will not retain enough heat to be able to burn this excess oil. New engines do tend to burn more oil because the rings in the engine have not seated all the way. The ring will properly seat after running the unit for at least 2-3 full tanks of 50:1 gas and oil mix.
The oil inside the muffler will always be there, however, if the engine is ran at full throttle a majority of the times, the oil will be burned before it has a chance to accumulate and begin to drip out of the muffler. If the unit is ran consistently at idle to mid range RPM speeds, the muffler stays relatively cool causing the oil to build and eventually escape from the muffler.
ECHO engines are designed to be operated at full throttle a majority of the time. Full throttle operation is when the engine is most efficient for emissions, power, cooling and overall performance.
To resolve the problem, run the unit at full speed when trimming using 50:1 fuel/oil mix that is less then 30 days old. If areas of low speed trimming are required, ECHO recommends to remove the trimmer from the cutting area and run the unit at full speed for a few seconds. After a few uses following the above procedure you will notice a considerable decrease in oil leakage, and an eventual elimination of the problem.
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