VOLVO PENTA 230 250 251 AQ131 AQ151 AQ171 ENGINE WORKSHOP SERVICE MANUAL



THIS MANUAL IS COMPATIBLE WITH THE FOLLOWING COMPUTER OPERATING SYSTEMS:
# ALL WINDOWS VERSION
# ALL MAC VERSION

# YOU NEED THE ADOBE ACROBAT READER TO VIEW THE DOCUMENT AS THE MANUAL IS PDF FORMAT. IF YOUR COMPUTER DON'T HAVE THIS APPLICATION YOU CAN DOWNLOAD AND INSTALL IT FREE FROM ADOBE ACROBAT WEBSITE

# AS THIS MANUAL IS COMING TO YOU IN ZIP FORMAT, YOU NEED TO EXTRACT THE FILE BEFORE USE BY USING WINZIP OR WINRAR SOFTWARE. IF YOUR COMPUTER DON'T HAVE THIS APPLICATION YOU CAN DOWNLOAD AND INSTALL IT FREE FROM WINZIP WEBSITE

# FILE SIZE 34 MB





THIS MANUAL PRESENTED FOR YOU IN ELECTRONIC FORMAT YOU CAN JUST PRINT OUT THE PAGE YOU NEED THEN DISPOSE OF IT WHEN YOU HAVE COMPLETED YOUR TASK. THIS MANUAL HAS DETAILED ILLUSTRATIONS AS WELL AS STEP BY STEP WRITTEN INSTRUCTIONS WITH THE NECESSARY DIAGRAMS OR PICTURES. THESE MANUALS ARE YOUR NUMBER ONE SOURCE FOR REPAIR AND SERVICE INFORMATION & SPECIFICALLY WRITTEN FOR THE DO-IT-YOURSELF AS WELL AS THE EXPERIENCED MECHANICS WORLDWIDE USED TO USE THIS FACTORY MANUAL TO FIX YOUR VEHICLE. USING THIS REPAIR MANUAL IS AN INEXPENSIVE WAY TO KEEP YOUR MACHINE WORKING PROPERLY. IT IS THIS LEVEL OF DETAIL, ALONG WITH ILLUSTRATED, THAT GUIDE THE READER THROUGH EACH SERVICE, REPAIR & MAINTENANCE PROCEDURE.



ENGINE COVERED:
4-CYLINDER 4-STROKE OVRHEAD CAM ENGINE


PLEASE NOTE THIS MANUAL IS FOR ABOVE MENTIONED VOLVO PENTA ENGINE ONLY.


CONTENTS:
SAFETY PRECAUTIONS
GENERAL INFORMATION
REPAIR INSTRUCTIONS
PRESENTATION
TROUBLE-SHOOTING SCHEME
OVERHAUL DATA
SPECIAL TOOLS
ELECTRICAL SYSTEM
WIRING DIAGRAM AQ131, AQ151, 230, 250 ALT. 1
WIRING DIAGRAM 230, 250 ALT. 2
WIRING DIAGRAM AQ171, 251DOHC ALT.1
WIRING DIAGRAM 251DOHC ALT. 2
FUEL SYSTEM
TROUBLE SHOOTING AND REMEDIES FUEL SYSTEM
OVERHAULING AND CHECKING THE CARBURETOR
TROUBLE-SHOOTING AND REPAIR IGNITION SYSTEM 251DOHC, AQ171 38
CYLINDER HEAD
REMOVAL OF TEH EXTERNAL COMPONENTS
COOLING SYSTEM
OVERHAULING THE HEAT EXCHANGER
OVERHAULING THE SEA WATER PUMP
CHECK THE THERMOSTAT
OVERHAULING THE VALVE SYSTEM
OVERHAULING THE VALVE SYSTEM 230, 250, AQ131, AQ151
ADJUSTING THE VALVES 230, 250, AQ131, AQ151
VALVE SYSTEM 251DOHC, AQ171. TECHNICAL DESCRIPTION
OVERHAULING THE VALVE SYSTEM 251DOHC, AQ171
INSTALLING THE TOOTHED BELT
INSTALLING THE TOOTHED BELT 230, 250, AQ131, AQ151
INSTALLING THE TOOTHED BELT 251DOHC, AQ171
INSTALLING THE EXTERNAL COMPONENTS OF THE CYLINDER HEAD
CYLINDER BLOCK
REMOVING THE EXTERNAL COMPONENTS
OVERHAULING THE CRANK ASSEMBLY
THE LUBRICATING OIL PUMP OVERHAULING
INSTALLING THE EXTERNAL COMPONENTS
OVERHAULING THE OIL COOLER 250, 251DOHC, AQ151, AQ171