Evinrude 4906B 4HP 1969 User Manual

TABLE OF CONTENTS
1
SAFETY
TOP SEAL
3-12
Removal
3-12
INTRODUCTION
1-1
BOTTOM SEAL
3-13
CLEANING, WAXING,
Inspection
3-14-
AND POLISHING
1-1
CENTERING PINS
3-15
CONTROLLING CORROSION
1-2
PROPELLERS
1-2
MAIN BEARING BOLTS
FUEL SYSTEM
1-7
AND CRANKCASE SIDE BOLTS
3-15
LOADING
1-9
CRANKCASE COVER
3-16
HORSEPOWER
1-10
Removal
3-16
FLOTATION
1-10
Cleaning and Inspecting
3-16
EMERGENCY EQUIPMENT
1-12
CONNECTING RODS
COMPASS 1-15
AND PISTONS 3-16
STEERING
1-17
Removal
3-17
ANCHORS
1-17
Disassembly 3-18
MISCELLANEOUS EQUIP MENT
1-18
Rod Inspection
BOATING ACCIDENT REPORTS
1-19
and Service 3-21
NAVIGATION
1-19
Piston and Ring Inspection
and Service 3-22
2 TUNING
Assembling
3-24-
CRANKSHAFT
3-27
INTRODUCTION
2-1
Removal
3-27
TUNE-UP SEQUENCE
2-2
Cleaning and
Inspection 3-27
COMPRESSION CHECK
2-3
Assembling
3-28
SPARK PLUG INSPECTION
2-4-
IGNITION SYSTEM
2-4-
CYLINDER BLOCK SERVICE 3-28
SYNCHRONIZING
2-5
Honing Procedures 3-29
BATTERY SERVICE
2-5
Assembling 3-30
CARBURETOR ADJUSTMENTS
2-7
Piston and Rod Assembly
FUEL PUMPS
2-9
Installation 3-30
STAR TER AND SOLENOID
2-10
Crankshaft Installation
INTERNAL WIRING HARNESS
2-11
Large Horsepower Engines
WATER PUMP CHECK
2-12
15 hp to 4-0 hp
3-33
PROPELLER
2-13
Crankshaft Installation
LOWER UNIT 2-14-
Small Horsepower Engines
BOAT TESTING
2-15
1.5 hp, 5.0 hp, 5.5 hp,
6.0 hp, 9.5 hp 3-35
3
POWERHEAD Crankshaft Installation
Small Horsepower Engines
INTRODUCTION
3-1
3.0 hp, 4-.0 hp, 7.5 hp
3-37
Theory of Operation
3-1
Crankcase Cover Installation
3-38
CHAPTER ORGANIZATION
3-4-
Main Bearing Bolt and Crankcase
POWERHEAD DISASSEMBLING
3-5
Side Bolt Installation 3-39
HEAD SERVICE
3-5
Bottom Seal Installation
REED SERVICE
3-6
15 hp to 4-0 hp Engines 3-39
Description
3-6
Exhaust Cover and Bypass
Reed Valve Adjustment
3-8
Cover Installation
3-4-0
Cleaning and Service
3-9
Reed Box Installation
3-4-0
BYPASS COVERS
3-10
Head Installation
3-4-1
EXHAUST COVER
3-11
BREAK-IN PROCEDURES
3-4-1
Cleaning
3-11
EXPLODED DRAWINGS
3-4-2 - 3-50

Evinrude 4906B 4HP 1969 Specifications

General

Horsepower	4HP
Year	1969
Model	4906B
Engine Type	2-Stroke
Cylinders	2
Fuel System	Carburetor
Starting System	Manual
Shaft Length	15 inches
Weight	34 lbs
Cooling System	Water-cooled
Propeller	2-Blade
Gear Shift	Forward-Neutral
Fuel Type	Gasoline