This is the COMPLETE Official Service Repair Manual for the Mercury Mercruiser #3 MARINE ENGINES Mercury Marine 4 Cylinder GM 4 Cylinder, GM 6 Cylinder, GM V-8 Cylinder. Production model years 1978 1979 1980 1981 1982 1983 1984. It Covers complete tear down and rebuild, pictures and part diagrams, torque specs, maintenance, troubleshooting, etc. You name it and its in here. This Manual contains everything you will need to repair, maintain, rebuild, refurbish or restore your Mercury Mercruiser Marine Engines. All diagnostic and repair procedures are covered. The manual has detailed illustrations, diagrams, wiring schematics and specifications as well as step-by-step instructions. All pages are printable, so run off what you need and take it with you into the garage or workshop. These manuals are your number one source for repair and service information. They are specifically written for the do-it-yourselfer as well as the experienced mechanic. Using this repair manual is an inexpensive way to keep your Mercury Mercruiser Marine Engines working properly. Each manual provides step-by-step instructions based on the complete disassembly of the machine. It is this level of detail, along with hundreds of photos and illustrations, that guide the reader through each service and repair procedure. MODELS COVERED: ========== MODEL - SERIAL NUMBER - MCM 120 - S/N: 4952701 - 6255465 - MCM 120R - S/N: 6255466- 6853913 - MCM 140 - S/N: 4918570 - 6256954 - MCM 140R - S/N: 6256955 - 6852269 - MCM 165 - S/N: 4884835 and Above - MCM 470 - S/N: 4886620 - 6218036 - MCM 470R - S/N: 6218037 - 6902287 - MCM 485 - S/N: 5685394 and Above - MCM 488R - S/N: 6170297 - 6899057 - MCM 898 - S/N: 4887830- 6218461 - MCM 898R - S/N: 6218462 - 6899057 - MCM 228 - S/N: 4902305 - 6225266 - MCM 228R - S/N: 6225267 - 6899268 - MCM 260 - S/N: 4908850- 6227756 - MCM 260R - S/N: 6227757 - 6890705 - MCM 330 - S/N: 4889680 - 60831 44 - MCM 330 (8-W) - S/N: 6083145- 6920831 - MCM 370/ 400 - S/N: 4883520- 6721534 - MCM 400 Cyclone - S/N: 5669232 - 6844266 - MCM 440 Cyclone - S/N: 6181070 - OA429860 - MCM 460 Cyclone - S/N: 6180970-6181039 - MCM 475 Turbo - S/N: 5670797 and Below - MCM 470TR - S/N: All (Note 1) - MCM 230TR - S/N: 6901029 and Below (Note 1) - MCM 260TR - S/N: 6885891 and Below (Note 1) - MIE 470 - S/N: All - MIE 228 - S/N: 4931100 - 5907057 - MIE 230 - S/N: 5907058 - 6901 029 - MIE 255 - S/N: 4924565 - 5907057 - MIE 260 - S/N: 5907058- 6885891 - MIE 330 - S/N: 4890180 - 5889913 - MIE 340 - S/N: 5889914- OA307952 NOTICE Refer to appropriate "Stern Drive Service Manual" for Transom Assembly and Stern Drive Unit Repair. ________________________________________________ TABLE OF CONTENTS: ========== 1 - IMPORTANT INFORMATION / TROUBLESHOOTING A - General Information B - Maintenance C - Troubleshooting 2 - REMOVAL-INSTALLATION-ALIGNMENT A - MCM 120 / 140 / 165 B - MCM 120R / 140R Driveshaft Extension Models C - MCM 470 / 485 / 488 D - MCM 898 / 228 / 260 E - MCM 898 / 228 / 260 Driveshaft Extension Models F - MCM 330TR / TRS with Mercury Marine Transmission G - MCM 330 (B-W) TR / TRS H - MCM 370 / 400TRS and Hi-Performance Engines I - MIE 470 / 228 / 230 / 255 / 260 / 330 / 340 3 - ELECTRICAL SYSTEM A - Starting System B - Ignition System C - Charging System D - Instrumentations E - Electrical Kits F - Wiring Diagrams 4 - FUEL SYSTEMS A - Fuel Delivery System and Fuel Pumps B - Rochester 2 Barrel C - MerCarb 2 Barrel D - Rochester 4 Barrel E - Holley 4 Barrel 5 - EXHAUST SYSTEM A - Exhaust Manifolds/ Elbows B - Exhaust Risers C - Exhaust Collectors 6 - ENGINE A - GM In-Line B - Mercury Marine 4 Cylinder Engine C - GM V-8 7 - COOLING SYSTEM A - Seawater Cooled Models B - 470 / 485 / 488 C - Closed Cooled Models 8 - DRIVE SYSTEMS A - Velvet Drive (Borg-Warner) Transmission B - Mercury Marine Transmission C - Driveshaft Models / Propeller Shaft 9 - POWER STEERING SYSTEM =========== ** Model Specification: Mercury Mercruiser #3 MARINE ENGINES Mercury Marine 4 Cylinder GM 4 Cylinder, GM 6 Cylinder, GM V-8 Cylinder ** Model Year: 1978-1984 ** Language: English ** Total Pages: 1092 ** File Format: PDF ** Requirements: Adobe PDF Reader ** ZOOM IN/OUT: YES ** INSTANT DELIVERY: YES ** Specifications: FULLY PRINTABLE & BOOKMARKED ** Compatible: All Versions of Windows & Mac, APP ISO, Iphone, Ipod, Android etc =========== This QUALITY manual is 100 percents COMPLETE and INTACT, no MISSING/CORRUPT pages/sections to freak you out! This PDF file is Bookmarked and SEARCHABLE to make what you need easy to find. Detailed illustrations, exploded diagrams, drawings and photos guide you through every service repair procedure. This manual can be viewed on any computer, as well as zoomed and printed. Complete download comes in PDF format which can work under all PC based Windows operating system and Mac also. It saves to your hard-drive and can be burned to CD-ROM. INSTANT DOWNLOAD MEANS THERE WILL BE NO SHIPPING COSTS OR WAITING FOR A PAPER OR CD MANUAL TO ARRIVE IN THE MAIL. YOU WILL RECEIVE THIS MANUAL TODAY VIA INSTANT DOWNLOAD ON COMPLETION OF PAYMENT VIA OUR SECURE PAYMENT PROCESSOR. WE ACCEPT ALL MAJOR CREDIT/DEBIT CARDS AND PAYPAL. YOU CAN DO THE REPAIRS YOURSELF AND SAVE MONEY $$ BUY FROM US AND I GUARANTEE YOU'LL BE A SATISFIED CUSTOMER AND CONTACT US IF YOU HAVE ANY QUESTIONS. Looking for some other Service Repair Manual, please check: