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Operator's Manual
SERVICE MANUAL
55A FOUR
MARINE DIESEL ENGINE
PUBLICATION #43377
1 st Edition / September 1998
WESTCRBEKE CORPORATION· MYLES STANDISH INDUSTRIAL PARK
150 JOHN HANCOCK ROAD, TAUNTON,
MA
02780-7319 U.S.A.
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Summary of Contents for Westerbeke 55A FOUR
- Page 1 SERVICE MANUAL 55A FOUR MARINE DIESEL ENGINE PUBLICATION #43377 1 st Edition / September 1998 WESTCRBEKE CORPORATION· MYLES STANDISH INDUSTRIAL PARK 150 JOHN HANCOCK ROAD, TAUNTON, 02780-7319 U.S.A.
- Page 2 CALIFORNIA PROPOSITION 65 WARNING Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. WARNING Exhaust gasses contain Carbon Monoxide, an odorless and colorless gas. Carbon Monoxide poisonous and can cause unconsciousness and death.
- Page 3 SAFETY INSTRUCTIONS INTRODUCTION PREVENT BURNS - FIRE Read these safety instructions carefully. Most accidents are caused by failure follow furuklmental rules and precau- WARNING: Fire can cause injury death! tions. Know when dangerous conditions exist and take the personne~ necessary precautions protect yourself, your •...
- Page 4 SAFETY INSTRUCTIONS ACCIDENTAL STARTING TOXIC EXHAUST GASES WARNING: CarbDn mDnDxide (CO) is a deadly gas! WARNING: Accidental starting can cause injury death! • Ensure that the exhaust system is adequate to expel gases discharged from the engine. Check the exhaust system •...
- Page 5 SAFETY INSTRUCTIONS ing adjustments, use extreme care to avoid touching ABYC, NFPA AND USCG PUBLICATIONS FOR moving parts and hot exhaust system components. INSTALLING DIESEL ENGINES • Do not wear loose clothing or jewelry when servicing Read the following ABYC, NFPA and USCG publications equipment;...
- Page 6 INSTALLATION When installing WESTERBEKE engines and generators it is important that strict attention be paid to the following infonnation: CODES AND REGULATIONS Strict federal regulations, ABYC guidelines, and safety codes must be complied with when installing engines and generators in a marine environment.
- Page 7 Metric Conversions ........77 55A FOUR Torques ........78 Standard Hardware Torques, General Screws, Sealants "...
- Page 8 INTRODUCTION ENGINE OVERHAUL CUSTOMER IDENTIFICATION CARD This service manual contains detailed information relating to 1-WV-IWESIE'RBEKE the overhaul of the 55A FOUR Diesel Engine. For the major ENGINE DISASSEMBLY, overhaul procedure, refer to the ENGINE INSPECTION AND REPAIR, ENGINE REASSEMBLY sections. Additional service information for...
- Page 9 INTRODUCTION 55A FOUR DIESEL ENGINE SPRING RETAINER INJECTION NOZZLE CYLINOER HEAD BOLT , PRE-CHAMBER LOWER SPRING SEAT t:jJ..I...-r~~~~r===d~~~~~~;;;:~~--'--- COMBUSTION CHAMBER INSERT Engines & Generators...
- Page 10 55A FOUR SPECIFICATIONS ENGINE SPECIFICATIONS COOLING SYSTEM General Freshwater-cooled block, thermostati- Engine Type Diesel, four-cycle, four-cylinder, fresh- cally controlled with raw water water-cooled, vertical, in-line (55 hp at exchanger system 3600 rpm maximum) Operating Temperature 170 - 190°F (77 - 88°C)
- Page 11 PARTS IDENTIFICATION ANODE WATER ' I ' M " " " , U I SENDER LUBE OIL DRAIN HOSE BATTERY GROUND CONNECTION OIL PRESSURE SENDER STARTER WITH SOLENOID LEFT SIDE REAR FRONT UNIT I. D. PLATE AIR CLEANER HOUSING MANIFOLD PRESSURE CAP DOMESTIC WATER HEATER CONNECTION POINTS...
- Page 12 TESTING FOR OVERHAUL HOW TO DETERMINE WHEN NOTE: Do not guess the conditions of other cylinders from a result of testing one cylinder. Be sure to measure the com- TO OVERHAUL THE ENGINE pression pressure for each cylinder. Look for cylinders with dramatically (at least 20%) lower compression than the aver- Cause of Low Compression age of the other cylinders.