Diagrams - ICS 680ES Manual De Mantenimiento

25. DIAGRAMS

CHECK
The engine
runs rough at all
speeds
A dirty air filter is the #1 reason for engine problems.
The engine is
overheating
Poor
acceleration
Uneven idle or
engine
may "run away"
Diamond chain
moves
at idle
Excessive
vibration
74
© 2020 ICS- Blount Inc Specifications and pricing are subject to change without notice. P/N 598000 REV01162020
POSSIBLE CAUSE
• Dirty or clogged air filter.
YES
• Water has been ingested.
• Loose or dirty spark plug.
• Operator is overworking
the power cutter.
• Carburetor mixture is too
lean.
YES
• Incorrect fuel/oil ratio.
• Flywheel fins are clogged.
• Air deflector is missing.
• Cylinder fins are clogged
• Dirty or clogged air filter.
• Clogged fuel filter.
YES
• Incorrect carburetor tune.
• Plugged tank breather.
• Blocked pulse tube.
• Air leak at intake boot,
cylinder gasket, or
YES
crankcase gasket.
• Faulty carburetor
diaphragm.
• Idle speed too high.
YES
• Broken clutch spring.
• Damaged shock
absorber.
YES
• Damaged or broken
flywheel fins.
• Bent crankshaft.
680ES SERVICE MANUAL
REPAIR
• Clean or replace the air
filter.
• Inspect air intake sysetm for
water.
• Inspect fuel system for
water.
• Tighten, clean, or replace
spark plug.
• See Operator's Manual.
• See Carburetor Tuning
section.
• See Power Cutter
Specifications section.
• Clean flywheel fins with wire
brush.
• See Starter Cover section.
• Clean cylinder fins.
• Clean or replace the air
filter.
• Replace fuel filter.
• See Carburetor Tuning
section.
• Repair or replace fuel tank
breather.
• Replace pulse tube.
• Inspect air intake boot.
• Pressure test crankcase.
• Replace carburetor.
• Adjust idle speed.
• Replace clutch spring.
• Replace shock absorbers
• Replace flywheel.
• Replace crankshaft.