2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 84Get this manual

2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 84

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Power unit 2 Clean the electrodes CD with spark plug cleaner or wire brushReplace the spark plug if necessary
I Specified spark plug: DPR6EA-9 (NGK)
I Spark plug gap0.9 mm (0.035 in)