General Information
22 VPA 7748089 English 09-2007
tion. Start gathering information from the boat operator and write it
on his job card or work ticket. Find out pertinent facts, such as:
• When did this trouble start?
• How was the boat loaded?
• Did the trouble occur suddenly, or start gradually?
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 com-
pressed.
• SPARK - Proper intensity at the proper time.
• FUEL - Proper mixture of air and fuel.
These are very old rules, but necessary for the engine to run. Use
these charts and the service information they refer to. Do not try to
remember tolerances, settings, measurements, etc., as they are
written in the service manual. Leave your mind free to analyze the
problem.
Following is a list of the troubleshooting guides which may be found
on the pages indicated.
Engine Will Not Crank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Hard Starting - Cold Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Hard Starting - Hot Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Engine Runs Rough . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Engine Noises and Vibrations . . . . . . . . . . . . . . . . . . . . . . . . . 24
Engine Overheats - Check: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Engine Dies Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Defective Engine Lubricating System . . . . . . . . . . . . . . . . . . . 26
Low Battery Voltage After Short Storage . . . . . . . . . . . . . . . . 27
Engine Will Not Crank
Starter Circuit - Check:
• Battery condition: weak, dead, sulfated, bad cells
• Battery cables for loose or corroded connections
• Shorted or open ignition switch
• Starter motor and solenoid for shorts, grounds or open cir-
cuits
• Starter assist solenoid/starter relay
• Circuit breakers
• Wiring from battery to ignition switch
•See Electrical/Ignition/Fuel Service Manual
Engine Cranks, But Will Not Start
Ignition Circuit
Check:
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