Mercury 50 4-Stroke User Manual

GENERAL INFORMATION
31
Models 40 50 60
Stroke 75 mm (2.953 in.)
Valve Clearance (Cold)
Intake Valve 0.15‑0.25mm (0.006‑0.010 in.)
Exhaust Valve 0.25‑0.35mm (0.010‑0.014 in.)
Recommended Spark Plug Champion RA8HC
Spark Plug Gap 1.0mm (0.040 in.)
Gear Ratio
83mm (3‑1/4 in.)
Diameter Gearcase
1.83:1
108mm (4‑1/4 in.)
Diameter Gearcase
2.31:1 or 2.33:1
Recommended Gasoline Refer to Fuel & Oil
Recommended Oil Refer to Fuel & Oil
Gearcase Lubricant
Capacity
83mm (3‑1/4 in.)
Diameter Gearcase
340 ml (11.5 fl. oz.)
108mm (4‑1/4 in.)
Diameter Gearcase
710 ml (24.0 fl. oz.)
Engine Oil Capacity 3.0 Liter (3 Quarts)
Battery Rating
Operation Above
0 °C (32 °F)
465 Marine Cranking Amps (MCA) or 350 Cold
Cranking AMPS (CCA)
Operation Below
0 °C (32 °F)
1000 Marine Cranking Amps (MCA) or 750 Cold
Cranking AMPS (CCA)
Ampere Hours (Ah) 70 ‑100
Sound at Drivers Ear
(ICOMIA 39‑94)
4‑Stroke 77.4
4‑Stroke with tiller 83.2

Mercury 50 4-Stroke Specifications

General

Engine Type	4-Stroke
Horsepower	50 hp
Cylinders	3
Starting System	Electric
Steering	Remote
Displacement	747 cc
Fuel Induction System	EFI
Alternator Amp	18 amp
Shaft Length	20 in
Full Throttle RPM Range	5000-6000 RPM
WOT Range	5000-6000 RPM
Fuel Tank Capacity	External Tank Required