Yanmar — Coolant water replacement
Maintenance · Cooling system
From a Yanmar service manual — check it applies to your exact model before use.
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Before you start
- Wait until the temperature goes down before draining the coolant water; hot water may splash causing scalding
Procedure
- Remove the radiator cap
- Loosen the drain plug at the lower portion of the radiator and drain coolant
- After draining the coolant, tighten the drain plug
- Fill radiator and engine with coolant water
Source: Yanmar service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.