Table 1 ENGINE TROUBLESHOOTING (continued)
Trouble
Probable cause
Correction
Engine stops suddenly (continued)
Engine slows unexpectedly
Engine will not run under full load
Engine knocks
Low oil pressure
Overheating
Governor malfunction
Engine seized
Overload
Fuel filter or fuel lines clogged
Air in fuel system
Water in fuel
Misadjusted governor
Piston or bearing seizure
Clogged fuel filter
Faulty fuel feed pump
Worn fuel injection pump
Excessive bearing clearance
Loose rod bolt
Loose flywheel or coupling bolt
Incorrect injection timing
Excessive fuel injected into cylinder
Oil leaks
Excessive bearing clearance
Clogged oil filter element
Faulty oil pressure regulator valve
Low oil viscosity
Dirty cooling system
Faulty thermostat
Insufficient coolant flow
lnsufficent coolant in closed system
Air entering system
Repair governor
lnspect and repair
Locate cause for overload and rectify
lnspect and unclog or replace
Bleed air in fuel system
Remove water
Adjust governor
Repair damaged components; determine
cause
Clean fuel filter
Repair fuel feed pump
Repair or replace fuel injection pump
lnspect and
lnspect and repair
Tighten bolt
Adjust timing
lnspect fuel injection pump and injectors
lnspect and repair
lnspect and repair
Clean or replace filter element
Repair oil pressure regulator valve
Replace oil; check for dilution due to fuel
leaking into crankcase
Flush cooling system
Replace thermostat
Check water pump; check for blockage in
system
Fill with proper coolant
Check for loose clamps and damaged
hoses
Table
2 STARTER MOTOR NO-LOAD SPECIFICATIONS
Model
Volts
Max. amperage
Speed (rpm)
12
All other models
12
4000 or higher
7000 or higher
Table 3 OIL PRESSURE
At 850 rpm
all models
At 3400 rpm
3HM and
At 3600 rpm
all models
except 3HM and
50
(7 psi)
300-400
(43-58
300-400
(43-58 psi)
Summary of Contents for 1GM10
Page 1: ...YANMAR DIESEL INBOARD SHOP MANUAL ONE TWO 8 THREE CYLINDER ENGINES...
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Page 28: ...GENERAL INFORMATION 21 Bearing Blocks Press Shaft arm Bearing Spacer Press k 4 bed...
Page 36: ...30 CHAPTER TWO CHARGING SYSTEM TYPICAL Battery switch...
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Page 44: ...38 CHAPTER TWO LUBRICATION SYSTEM 2GM AND 2GM20 MODELS...
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Page 145: ...FUEL INJECTION AND GOVERNOR SYSTEMS 139 FUEL INJECTION SYSTEM Fuel tank hose fuel pipe...
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Page 170: ...164 CHAPTER EIGHT CLOSED COOLING SYSTEM TYPICAL rnlxlng elbow Joint...
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Page 224: ...218 CHAPTER ELEVEN...
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