TROUBLESHOOTING
118
YDG Operation Manual
TROUBLESHOOTING CHART
SYMPTOM PROBABLE CAUSE ACTION REFER TO
Engine Does Not Start
• Starter motor operates but
engine does not start
• No diesel fuel • Refuel fuel system Filling The Fuel
Tank on page 46
• Engine control lever not in the
run position
• Move engine control lever to
the run position
• Engine oil level low • Check and fill oil to proper
level
• Improper diesel fuel • Replace with recommended
diesel fuel
Diesel Fuel
Specifications on
page 44
• Clogged engine oil filter • Replace engine oil filter
• Clogged fuel filter • Replace fuel filter Drain the Fuel Tank
and Replace Outlet
Fuel Filter on
page 113
• Poor fuel injection • See authorized Yanmar
industrial engine dealer or
distributor
—
• Compressed air leakage from
intake / exhaust valves
—
• Faulty engine stop solenoid —
• Engine starts with recoil
starter but then dies
• Key switch not in the ON
position
• Turn key to the ON position
• Starter motor does not
operate or rotates too slowly
(engine can be turned
manually)
• Battery needs charging • Check electrolyte, recharge Check Battery on
page 101
• Faulty cable connection at
• battery terminals
• Clean terminals, retighten —
• Faulty starter switch • See authorized Yanmar
industrial engine dealer or
distributor
—
• Faulty starter motor —
• Engine cannot be manually
turned
• Inner parts seized or damaged —
White or Black Exhaust Smoke
• Black exhaust smoke • Engine overloaded • Reduce load —
• Clogged air cleaner element • Clean element or replace Clean Air Cleaner
Element on page 111
• Improper diesel fuel • Replace with recommended
diesel fuel
Diesel Fuel
Specifications on
page 44
• Faulty spraying of fuel
injection
• See authorized Yanmar
industrial engine dealer or
distributor
—
• Excessive intake / exhaust
valve clearance
—
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