Yamaha Outboard Motors Factory Service Manual F6 and F8, Page 24Get this manual
SAFETY WHILE WORKING SAFETY WHILE WORKING The procedures given in this manual are those recommended by Yamaha to be followed by Yamaha dealers and their mechanics
FIRE PREVENTION
Gasoline (petrol) is highly flammablePetroleum vapor is explosive if ignitedDo not smoke while handling gasoline and keep it away from heat, sparks and open flames
VENTILATION
Petroleum vapor is heavier than air and is deadly if inhaled in large quantitiesEngine exhaust gases are harmful to breatheWhen test-running an engine indoors, maintain good ventilation