2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 79Get this manual
Periodic checks and adjustments
Oil quantity: With oil filter replacement: 2.2 (2.3 US qt, 1.9 Imp qt) Without oil filter replacement: 2.0 (2.1 US qt, 1.8 Imp qt) 8Install the oil filler cap and dipstick, and then start the engine and warm it up for minutesTurn the engine off, and then check the oil level and correct it if necessary
S62Y3140
Checking the timing belt
1Remove the flywheel magnet cover2While turning the flywheel magnet clockwise, check the interior and the exteriorof the timing belt for cracks, damage, or wearReplace if necessaryDo not turn the flywheel magnet counterclockwise, otherwise the valve system may be damaged2Remove the flywheel magnet