Yamaha 20D Owner's Manual page 170

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Remove the propeller for safety when
using the water check plug.
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3 Water check plug
EMK29010
Battery Care
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Battery electrolyte is poisonous and dan-
gerous, causing severe burns, etc. It con-
tains sulfuric acid. Avoid contact with
skin, eyes, or clothing.
Antidote:
EXTERNAL; Flush with water.
INTERNAL; Drink large quantities of
water or milk. Follow with milk of mag-
nesia, beaten egg, or vegetable oil. Call
physician immediately.
EYES; Flush with water for 15 minutes
and get prompt medical attention.
Batteries produce explosive gases: Keep
sparks, flame, cigarettes, etc. away. Ven-
tilate when charging or using in a closed
space. Always wear eye protection when
working near batteries.
KEEP OUT OF REACH OF CHILDREN.
NOTE:
Batteries vary among manufacturers.
Therefore the following procedures may
not always apply. Consult your battery
manufacturer's instructions.
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