Yamaha F50 Owner's Manual page 21

Total displacement:
3
996 cm (60.8 c.i.)
Bore  stroke:
65.0  75.0 mm (2.56  2.95 in)
Ignition system:
TCI
Spark plug (NGK):
F50B DPR6EB-9
F50HB DPR6EB-9
F60B DPR6EB-9
F60HB DPR6EB-9
F70A LKR7E
F70HA LKR7E
T50B DPR6EB-9
T60B DPR6EB-9
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
Steering system:
F50B Remote steering
F50HB Tiller handle
F60B Remote steering
F60HB Tiller handle
F70A Remote steering
F70HA Tiller handle
T50B Remote steering
T60B Remote steering
Starting system:
Electric starter
Starting carburetion system:
Fuel injection
Valve clearance IN (cold engine):
0.15–0.25 mm (0.0059–0.0098 in)
Valve clearance EX (cold engine):
0.25–0.35 mm (0.0098–0.0138 in)
Min. cold cranking amps (CCA/SAE):
380 A
Min. marine cranking amps (MCA/ABYC):
502 A
Min. reserve capacity (RC/SAE):
124 minutes
Maximum generator output:
Specifications and requirements
Lower unit:
Fuel and oil:
F50B 16 A
F50HB 16 A
F60B 16 A
F60HB 16 A
F70A 15 A
F70HA 15 A
T50B 16 A
T60B 16 A
Gear shift positions:
Forward-neutral-reverse
Gear ratio:
F50B 1.85(24/13)
F50HB 1.85(24/13)
F60B 1.85(24/13)
F60HB 1.85(24/13)
F70A 2.33(28/12)
F70HA 2.33(28/12)
T50B 2.33(28/12)
T60B 2.33(28/12)
Trim and tilt system:
Power trim and tilt
Propeller mark:
F50B G
F50HB G
F60B G
F60HB G
F70A K
F70HA K
T50B K
T60B K
Recommended fuel:
Regular unleaded gasoline
Min. pump octane number (PON):
86
Fuel tank capacity:
25 L (6.60 US gal, 5.50 Imp.gal)
Recommended engine oil:
YAMALUBE 4M FC-W or 4-stroke
outboard motor oil
15