2008 Honda Aquatrax ARX1500T3/T3D factory service manual, Page 103Get this manual
FLUSHING AND STORAGE
COOLING SYSTEM FLUSHING
Secure the watercraft stand or trailer and check that the stern is not higher than the bow1Pull the reverse lever to lower the reverse bucketConnect garden hose to the flushing connector (Do not turn on the water)
FLUSHING CONNECTOR
Always start the engine before turning on the water to prevent water entering the exhaust and engine where it could cause severe damage2Start the engine and immediately (within 15 seconds) turn the water