Yamaha RS90MSL Owner's Manual page 63

1 "COLD LEVEL" mark
2 Coolant reservoir cap
2. Start the engine and add coolant until the coolant
level does not go down, and then stop the engine.
3. Fill the coolant reservoir with coolant until it reaches
the "COLD LEVEL" mark.
4. Install the coolant reservoir cap. Check for any cool-
ant leakage.
NOTE:
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If you find any leaks, consult a Yamaha dealer.
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