TABLE OF CONTENTS - marineengine.com

1 TABLE OF CONTENTS 1 SAFETY FUEL INTRODUCTION 1-1 INTRODUCTION 4-1 CLEANING, WAXING, &: POLISHING 1-1 GENERAL CARBURETION FLOTATION 1-8 TROUBLESHOOTING ANCHORS 1-10 "Sour" Fuel 4-' BOATING ACCIDENT REPORTS 1-10 Fuel Pump Test 4-' COMPRESSION CHECK 2-3 CARBURETOR "A" TIMING AND SYNCHRONIZING 2-4 Assembling &: Installation 4-1' FUEL PUMPS 2-7 CARBURETOR "B" PROPELLER 2-9 Adjustments 4-2' BOAT TESTING 2-10 CARBURETOR "C" OUTBOARD SERIAL NUMBERS 3-2 CA RBURETOR "D" LUBRICA TION - COMPLETE UNIT 3-3 Removal &: Disassembling 4-3' SUBMERGED ENGINE SERVICE 3-7 CARBURETOR "E" INSIDE THE BOAT 3-9 Cleaning &: Inspecting 4-4' CONTROLLING CORROSION 1-2 INFORMA TION 4-1 PROPELLERS 1-2 FUEL SYSTEM 4-3 LOADING 1-7 Leaded Gasoline &: Gasohol 4-3 HORSEPOWER 1-8 Removing Fuel From System 4-4 Fuel Line Test 4-7 Rough Engine Idle 4-7 2 ruNING Excessive Fuel Consumption 4-8 Engine Surge 4-8 INTRODUCTION 2-1 CARBURETOR IDENTIFICATION 4-9 TUNE-UP SEQUENCE 2-1 SPARK PLUG INSPECTION 2-3 Removal &: Disassembling 4-10 IGNITION SYSTEM 2-3 Cleaning &: Inspecting 4-14 ELECTRICAL POWER SUPPLY 2-' Adjustments 4-19 CARBURETOR ADJUSTMENT 2-6 CRANKING MOTOR TEST 2-8 Removal &: Disassembling 4-20 INTERNAL WIRING HARNESS 2-8 Cleaning &.

2 Inspecting 4-23 WATER PUMP CHECK 2-9 Assembling &: InstallatIon 4-23 LOWER UNIT 2-10 Removal &: Disassembling 4-27 Cleaning &: Inspecting 4-30 3 MAINTENANCE Assembling &: Installation 4-31 Adjustments 4-34 INTRODUCTION 3-1 EMERGENCY TETHER 3-3 Cleaning &: Inspecting 4-37 PRE-SEASON PREPARATION 3-3 Assembling &: Installation 4-39 FIBERGLASS HULLS 3-6 Adjustments 4-42 BELOW WATERLINE SERVICE 3-6 PROPELLER SERVICE 3-8 Removal &: Disassembllng 4-43 LOWER UNIT 3-1' Assembling &: Installation 4-47 WINTER STORAGE 3-16 Adjustments 4-49 SPARK PLUG EVALUATION '-2 PUEL (Continued) POLARITY CHECK '-4 CARBURETOR "F" Removal &: Disassembling 4-'0 TYPE I IGNITION SYSTEM -MAGNETO Cleaning &: Inspecting 4-'3 WITH BREAKER POINT SET '-4 Assembling &: Installation 4-'6 Description &: Operation '-4 Adjustments 4-61 Troubleshooting '-6 Disassembling '-9 CARBURETOR "G" Testing Components '-12 Removal &: Disassembling 4-61 Assembling &: Installation '-14 Cleaning &: Inspecting 4-6' Breaker Point Adjustment '-1' Assembling &.

3 Installation 4-66 Adjustments 4-70 TYPE nIGNITION SYSTEM - COl (CAPACITOR DISCHARGE) '-17 CARBURETOR "HI! Description &: Operation '-17 Removal &: Disassembling 4-71 Troubleshooting '-18 Cleaning &: Inspecting 4-73 Testing One-Cylinder Assembling &: Installation 4-7' Components '-20 Adjustments 4-77 Testing Two-Cylinder Components '-23 CARBURETOR "l" Removal &: Disassembling 4-79 FLYWHEEL AND STATOR PLATE Cleaning &: Inspecting 4-82 SERVICE '-31 Assembling &: Installation 4-84 "Pulling" the Flywheel '-31 Adjustments 4-88 Stator Plate Removal '-33 Cleaning &: Inspecting '-34 CARBURETOR "K" Assembling &: Installation '-3' Assembling &: Installation 4-94 6 TIMING AND SYNCHRONIZING Removal &.

4 Disassembling 4-89 Cleaning &: Inspecting 4-93 Adjustments 4-99 INTRODUCTION CARBURETOR ilL" AND PREPARATION 6-1 Removal &: Disassembling 4-100 Tachometer Connections FUEL PUMP MODEL , I'HP, &: ALL OTHER 6-2 Cleaning &: Inspecting 4-102 MODELS W /BREAKER POINT Assembling &: Installation 4-104 TYPE IGNITION 6-4 Adjustments 4-107 MODEL 4HP &: 'HP 6-' MODEL 8C 6-7 Theory of Operation 4-108 8HP AFTER 1979 6-8 Pump Pressure Check 4-109 MODEL 20HP, 2'HP, &: 30HP 6-11 Pump Removal 4-110 MODEL 40HP /SINGLE CARB 6-14 Cleaning &: Inspecting 4-110 MODEL 40HP /DUAL CARB 6-17 AssembUng 4-111 MODEL 48HP, "HP, &: 60HP 6-21 INTRODUCTION 4-113 7 POWERHEAD AUTO BLEND Description 4-113 INTRODUCTION AND CHAPTER Operation 4-11' ORGANIZATION 7-1 Troubleshooting 4-11' TWO-STROKE POWERHEAD Preparation for Use 4-118 SERVICING POWERHEAD "A" MODEL 2HP 7-3 System Storage 4-117 DESCRIPTION &: OPERATION 7-2 'IGNmoN Removal &: Disassembling 7-3 INTRODUCTION AND CHAPTER Cleaninfi &: Inspecting 7-67 COVERAGE '-1 Assemb ing &: Installation 7-8 7 SERVICING POWERHEAD "B" SINGLE-CYLINDER AIR-COOLED MODEL 3.

5 5HP AND .5HP 7-13 Removal &: Disassembling 7-13 Cleaning &: Inspecting 7-67 Assembling &: Installation 7-18 SERVICING POWERHEAD "C" SINGLE-C YLIN DER WATER-COOLED MODEL 4HP &: .5HP 7-22 Removal &: Disassembling 7-22 Cleaning &: Inspecting 7-67 Assembling &: Installation 7-26 SERVICING POWERHEAD "D" TWO-CYLINDER, WATER-CooLED MODEL 8HP, , UHP, 20HP, ,28HP,30HP,40HP,48HP, "HP, AND 60HP 7-33 Power head Preparation 7-33 Removal &: Disassembling 7 -36 Cleaning &: Inspecting 7-67 Assembling &: Installation 7-42 Closing Tasks 7-66 CLEANING &: INSPECTING 7-67 Reed Block Service 7-67 Exhaust Cover 7-68 Crankshaft Service 7-69 Connecting Rod Service 7-72 Piston Service 7-73 Ring End Gap Clearance 7-74 Piston Ring Side Clearance 7-76 Oversize Pistons &.

6 Rings 7-76 Cylinder Block Service 7-77 Honing Cylinder Walls 7-79 Block &: Cylinder Head Warpage 7-80 aELECTRICAL INTRODUCTION 8-1 BATTERIES 8-1 Jumper Cables Storage 8-6 THERMOMEL T STICKS 8-6 TACHOMETER 8-6 ELECTRICAL SYSTEM GENERAL INFORMATION 8-7 CHARGING CIRCUIT SERVICE 8-9 CRANKING MOTOR CIRCUIT SERVICE 8-9 Motor Troubleshooting 8-10 Relay Testing 8-11 CRANKING MOTOR SERVICE 8-13 Description 8-13 Removal 8-14 Disassembling 8-14 Cleaning &: Inspecting 8-17 Testing Cranking Motor Parts 8-17 Assembling 8-19 Installation 8-21 TESTING OTHER ELECTRICAL PARTS 8-21 9 LOWER UNIT DESCRIPTION 9-1 CHAPTER COVERAGE 9-1 TROUBLESHOOTING 9-2 PROPELLER REMOVAL 9-3 PROPELLER INSTALLATION LOWER UNIT TYPE "A" NO REVERSE GEAR 9-6 Removal 9-6 Disassembling 9-7 Cleaning &: Inspecting 9-11 Assembling 9-13 Installation 9-18 LOWER UNIT TYPE "B" FORWARD, NEUTRAL &: REVERSE, ONE-PIECE GEAR CASE 9-20 Description 9-20 Removal 9-21 Disassembling 9-23 Water Pump 9-23 Cleaning &.

7 Inspecting 9-33 Assembling 9-43 Pinion Gear Depth 9-49 Backlash Measurement Water Pump Installation 9-60 Propeller Installation 9-63 Trim Tab Adjustment 9-64 Closing Tasks 9-64 Lower Unit Capacities 9-64 LOWER UNIT TYPE "C" FOR WARD, NEUTRAL &: REVERSE, TWO-PIECE GEAR CASE Description Removal Disassembling 9-66 Water Pump 9-67 Cleaning &: Inspecting 9-72 Assembling Pinion Gear Depth 9-78 Backlash Measurement 9-78 Water Pump 9-79 , LOWER. UNIT (Continued) LOWER UNIT TYPE "C" (Cont.) Installation Propeller Installation Trim Tab Adjustment Closing Tasks 10 REMOTE CONTROLS INTRODUCTION DISASSEMBLING CLEANING &: INSPECTING ASSEMBLING 11 HAND REWIND STARTER INTRODUCTION AND CHAPTER COVERAGE STARTER IDENTIPICATION SERVICING TYPE "A" Removal &: Disassembling Cleaning &: Inspecting Assembling &: Installation SERVICING TYPE ''B'' Removal &: Disassembling Cleaning &: Inspecting Assembling &: Installation SERVICING TYPE "Cit Removal &: Disassembling Cleaning &: Inspecting Assembling &.

8 Installation 9-80 9-82 9-82 9-82 10-1 10-2 10-9 10-11 11-1 11-1 11-1 11-4 11-8 11-9 11-10 11-11 SERVICING TYPE ItO" Removal &: DisassemblIng 11-19 Cleaning &: Inspecting 11-20 Assembling &: Installation 11-20 SERVICING TYPE "E" Removal &: Disassembling 11-22 Cleaning &: Inspecting 11-24 Assembling &: Installation 11-24 SERVICING TYPE "pit Removal &: Disassembling Cleaning &: Inspecting 11-27 Assembling &: Installation 11-28 APPENDIX METRIC CONVERSION CHART A-I ENGINE SPECIPICA TIONS AND TUNE-UP ADJUSTMENTS A-2 WIRING DIAGRAMS Mode12hp A-10 Model 3 .5hp &: .5hp A-10 (Air-Cooled) Model 4hp &.

9 5hp A-ll (Water-Cooled) Model8hp, , 20hp, &: 28hp A-12 (Breaker Point Ignition System) Model 8hp, , &: 20hp A-13 (Electric Start System) Model 8hp, , &: A-14 (COl Ignition System) Model 20hp, , &: 30hp (COl Ignition System) Model 28hp A-16 (Electric Start System) Model 48hp, . , &: 60hp A-I8 s.