Honda Lawn tractors

Coolant capacity & service interval

Honda lawn tractors use coolant with a capacity range of 1,75 to 2,7 liters. Service intervals occur every 24 months. The data covers 2 configurations.

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

TypeSpecifications
H4514H, MZAS (1000001 -> 9999999)
  • Use: Normal
  • Capacity 1,75 liter
  • Change 24 months
H4518H, MZAT (1000001 -> 9999999)
  • Use: Normal
  • Capacity 2,7 liter
  • Change 24 months

Additional Notes

  • The H4514H with MZAS engine holds 1.75 liters of coolant in the cooling system, while the H4518H with MZAT engine holds 2.7 liters, a difference of nearly a full liter between the two configurations.
  • Both Honda lawn tractor cooling systems share a 24-month change interval under normal use conditions, meaning neither engine variant calls for more frequent coolant replacement than the other despite the capacity difference.
  • The 2.7-liter capacity of the H4518H MZAT cooling system is notably larger relative to a typical small-engine application, reflecting a greater thermal management demand from the higher-displacement powerplant.
  • Serial number ranges for both configurations begin at 1000001 and extend through 9999999, indicating the specifications apply across the full known production run of each respective model variant.

Other Systems