Mercury 50 User Manual

MAINTENANCE
66
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2. Remove the spark plugs to inspect. Replace spark plug if electrode is worn or the insulator is rough, cracked,
broken, blistered or fouled.
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3. Set the spark plug gap to specification.
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Spark Plug
Spark plug gap 1.0 mm (0.040 in.)
4. Before installing spark plugs, clean off any dirt on the spark plug seats. Install plugs finger tight, and then
tighten 1/4 turn or torque to specifications.
Description Nm lb. in. lb. ft.
Spark plug 27 20
Lubrication Points
1. Lubricate the following with Quicksilver or Mercury Precision Lubricants Anti-Corrosion Grease or 2-4-C with
Teflon.
• Propeller Shaft - Refer to Propeller Replacement for removal and installation of the propeller. Coat the
entire propeller shaft with lubricant to prevent the propeller hub from corroding and seizing to the shaft.
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Mercury 50 Specifications

General

Horsepower	50 hp
Cylinders	3
Steering	Remote
Starting	Electric
Displacement	995 cc
Fuel Induction System	EFI (Electronic Fuel Injection)
Alternator Output	18 amp
Shaft Length	20" / 508 mm
Dry Weight	112 kg
Engine Type	4-Stroke