2004-2007 Honda Aquatrax ARX1200N3/T3/T3D Factory Service Manual, Page 132Get this manual
FLUSHING AND STORAGE
COOLING SYSTEM FLUSHING
Secure the watercraft on stand or trailer and check that the stern is not higher than the bow1Pull the reverse lever up to lower the reverse bucketConnect garden hose to the water outlet joint (Do not turn on the water)OUTLET JOINT
Always start the engine before turning on the water to prevent water entering the exhaust and engine where it could cause severe damage
2Start the engine and immediately (within 15 seconds) turn on the water
PILOT WATER HOLE