Mercury FourStroke 3.5 User Manual

Powerhead
90-8M0065421 NOVEMBER 2012 Page 4A-31
2. Measure the valve stem outer diameter. Replace the valves if out of specification.
20971
Valve Stem O.D.
Intake 5.45–5.47 mm (0.2146–0.2154 in.)
Exhaust 5.44–5.46 mm (0.2142–0.2150 in.)
Lifters and Push Rods
1. Replace the valve lifter if worn or corroded.
2. Replace the push rod if worn or corroded.
3. Inspect the push rod for straightness. Replace if bent.
a - Lifter
b - Push rod
Valve Springs
1. Check the free length of each spring. Replace the valve springs if out of specification.
20973
Valve Spring
Free length 33.2–35 mm (1.307–1.378 in.)
2. Measure the valve spring tilt. Replace the valve springs if out of specification.
26700
a
b

Mercury FourStroke 3.5 Specifications

General

Brand	Mercury
Model	FourStroke 3.5
Category	Outboard Motor
Language	English