Engine Troubleshooting Guides - Volvo 5.0OSiE-J Operator's Manual

Troubleshooting

Engine Troubleshooting Guides

EFI Engines Only: Refer to EFI Diagnostic Manual.
These guides were written to help you trace the symp-
toms of the trouble to the source, without having to
read through and prove every possibility. Much of the
information here will be familiar to well informed me-
chanics.
Also, many factors will seem insignificant but when
you think of it, usually the toughest problem to trouble-
shoot is caused by the smallest error. The greatest aid
to solving a service problem is information. Start gath-
ering information and keep a detailed record of the
symptoms of the malfunction. Keep a record of perti-
nent facts, such as:
•
When did this trouble start?
•
How was the boat loaded?
•
Did the trouble occur suddenly or did it become
apparent gradually?
Following is a list of the troubleshooting guides which may be found on the pages indicated.
Title
Engine Will Not Crank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Engine Cranks, But Will Not Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Hard Starting - Cold Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Hard Starting - Hot Engine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Engine Runs Rough . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Engine Noises and Vibrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Engine Overheats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Engine Dies Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Engine Won't Reach Operating RPM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Defective Engine Lubricating System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Low Battery Voltage After Short Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
108
Whether servicing the boat's systems yourself or hav-
ing your product serviced by a certified Volvo Penta
dealer, you will need this record of information to iden-
tify potential causes of the malfunction.
Analyze this information and try to match it to similar
situations you have experienced in the past. Keep in
mind the fundamental rules:
•
COMPRESSION - Mixture inducted into cylinder
and compressed.
•
SPARK - Proper intensity at the proper time.
•
FUEL - Proper mixture of air and fuel.
•
EXHAUST - Clear of any obstructions.
These are very old rules, but necessary for the engine
to run. Use the following charts and the service infor-
mation to which they refer. Do not try to remember tol-
erances, settings, measurements, etc., as they are
written in the service manual. Leave your mind free to
analyze the problem.
Page
VPA 7748131 English 09-2007