Ossa Explorer

Coolant capacity & service interval

Ossa Explorer coolant capacity ranges from 0.5 to 0.8 liters. Service intervals require a change every 12 hours. The data covers 5 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
Explorer 250i (2015-2015)
  • Use: Normal
  • Between min and max.
  • Change 12 hours
Explorer 280i (2015-2015)
  • Use: Normal
  • 'max' capacity
  • Change 12 hours
Explorer 250i (2014-2014)
  • Use: Normal
  • Between min and max.
  • Change 12 hours
Explorer 280i (2014-2014)
  • Use: Normal
  • 'max' capacity
  • Change 12 hours
Explorer 280i (2012-2013)
  • Use: Normal
  • 'max' capacity
  • Change 12 hours

Additional Notes

  • Across all Explorer 250i and 280i configurations, the coolant change interval is set at 12 hours of use under normal conditions. In off-road and enduro applications, service intervals measured in operating hours rather than distance reflect the intensity and variability of engine load typical of competition or trail riding.
  • The Ossa Explorer 250i, covering the 2014-2015 model years, specifies a coolant fill level between the minimum and maximum marks on the reservoir or sight glass. A between-min-and-max fill instruction indicates that an exact volume is less critical than keeping the fluid within the designated operating range.
  • The Explorer 280i across all listed years, 2012-2015, specifies filling the cooling system to the maximum capacity mark. A fill-to-max instruction is typically associated with systems where the full volume is needed to maintain adequate thermal management across the engine's operating range.
  • The distinction between the 250i's between-min-and-max specification and the 280i's max-capacity specification reflects a difference in cooling system fill requirements between the two engine displacements, even though both share the same 12-hour change interval.
  • The 280i's cooling system specification remains consistent at max capacity across all of its listed model years, from 2012 through 2015, indicating no revision to the fill requirement over that production span.

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