Subaru Robin EX13 - Manual (Page 109)

- 2
2 -
9-2 ADJUSTING FOR THE ENVIRONMENT
In addition to a regular maintenance routine, some application circumstances require special care,
such as high altitudes, heat and cold .
Altitudes above 5,000 feet may cause engines to start hard and perform poorly . Emissions also
are typically higher, and operators may experience trouble with spark plugs . Modifying the throttle
body can improve both performance and emission levels . Moving to a job site below 5,000 feet
requires converting the engine back to levels recommended by the manufacturer . Failure to do so
will cause the engine to overheat and can result in damage .
Operating an engine after the mercury has surpassed 100 degrees Fahrenheit also can be
problematic . Ensuring dirt does not obstruct an engine’s cooling mechanisms will help prevent
problems with overheating . However, do not attempt to cool a hot engine with water since the
temperature difference will likely damage the engine .
Operators also should check and change the oil and oil filter more frequently than normal when
using an engine in hot weather . Take the heat into account when choosing the oil’s viscosity, as
well .
On the other end of the thermometer, monitoring the oil’s viscosity remains important . If a cold
front should move in before the oil has been changed to a more appropriate viscosity, move the
machine to a warm, well-ventilated space before attempting to start the engine or change the oil .
Keeping the fuel tank full will prevent moisture from condensing inside the tank when it’s cold,
which can cause problems with engine operation . Ensuring the battery remains well-charged also
will combat problems an operator may face in a cold environment .
One trick to ease frustration if the machine needs to remain outside and an ice storm is
anticipated is to push the throttle to the middle of its speed range . Should ice form on the linkage,
it will be easier to start the engine with the throttle in this position .