Yanmar YT2

Coolant capacity & service interval

Yanmar YT2 coolant capacity ranges from 1,8 to 5 liters. Service intervals include checks at 10 hours and changes at 24 months or 2000 hours. The data covers 5 configurations.

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

TypeSpecifications
YT222 (2021- )
  • Use: Normal
  • Capacity 1,8 liter
  • Check 10 hours
  • Change 24 months
YT225 (2021- )
  • Use: Normal
  • Capacity 1,8 liter
  • Check 10 hours
  • Change 24 months
YT228 (2021- )
  • Use: Normal
  • Capacity 2,3 liter
  • Check 10 hours
  • Change 24 months
YT232 (2021- )
  • Use: Normal
  • Capacity 2,3 liter
  • Check 10 hours
  • Change 24 months
YT235 (2021- )
  • Use: Normal
  • Capacity 4,5-5 liter
  • Check 10 hours
  • Change 2000 hours/ 24 months

Additional Notes

  • The Yanmar YT2 cooling system capacity splits into two distinct groups across the lineup. The YT222 and YT225 hold 1.8 liters, while the YT228 and YT232 hold 2.3 liters, reflecting differences in engine displacement between the two pairings.
  • The YT235 stands apart from all other YT2 variants with a notably larger cooling system capacity of 4.5 to 5 liters. A range rather than a fixed value at this level typically accounts for variation introduced during a fill, such as air pockets or differences in drain completeness.
  • Across the YT222, YT225, YT228, and YT232, the coolant change interval is set at 24 months under normal use conditions. No hourly interval accompanies the change schedule for these four variants.
  • The YT235 carries a dual-condition change interval of 2,000 hours or 24 months under normal use, whichever comes first. The addition of an hourly threshold alongside the calendar interval reflects the higher operational demands associated with a larger-displacement engine.
  • All five variants share a coolant check interval of 10 hours under normal use conditions. At 10 hours, a check interval is among the shortest in routine service schedules, indicating that coolant level monitoring is treated as a frequent task relative to other service items.
  • The capacity listed for each variant refers to the full cooling system volume, not just the reservoir. A system-level figure of this kind is relevant when performing a complete drain and refill rather than a top-up.

Other Systems