Troubleshooting - Honda UMS425E Owner's Manual

2. Clean the filter with warm soapy water or in a nonflammable
solvent and then leave to dry.
3. Dip the element in clean engine oil and squeeze out the excess oil.
Clean Squeeze and dry
Do not twist.
4. Reinstall the foam filter element and the filter cover.
MAINTENANCE SCHEDULE
Perform this maintenance at
every indicated month or
operating hour interval,
whichever comes first.
Item Intervention
Engine cooling fins Clean
Condition of
cutting
Check
attachment and
guard
Zone around head Clean
Operation of
Check
throttle trigger
Operation of Stop
Check
button
Idle/Clutch Check
Check
Air filter element
Clean
Air filter housing Clean
Zone around spark
Clean
plug
Check
Spark plug
Clean
Zone around
Clean
carburettor
Fuel system Check
Fuel filter Check
Spring and clutch
Check
pads
Check
Idle speed
Adjust
Check
Engine oil
Replace
Fuel tank Clean
Valve clearance Adjust
Check /
Nuts and bolts
Tighten
(1) Clean more often in dusty environments.
(2) These operations should be performed by your servicing dealer.
Dip in oil Squeeze
Do not twist.
Frequency
Every 3 Every 6
Each
months months
time
or or
used
25 hours 50 hours
(1)
(1)
Every 2 years (replace if necessary) (2)
(2)
Replace after 10 service hours and then
every 6 months or 50 service hours

TROUBLESHOOTING

Problem
Engine does not start. 1. No fuel.
Every
year
or 100
hours
Starting difficult or
loss of power.
Uneven running.
Engine overheats.
(2)
(2)
(2)
Grass trimmer
vibrates excessively.
(2)
Probable cause
2. Start/Stop button is in Stop
position.
3. Spark plug cord incorrectly
attached or disconnected.
4. Faulty spark plug or incorrect
gap.
5. Engine flooded. Remove spark
plug, dry it with a cloth and
reinstall it.
6. Fuel filter is dirty. Clean it.
1. Impurities in fuel tank.
2. Dirty air filter.
3. Water in fuel tank and in fuel.
4. Fuel tank cap vent and /or
carburettor clogged.
1. Faulty spark plug or incorrect
gap.
2. Dirty air filter.
1. Spark plug gap incorrect.
2. Dirty air filter.
3. Engine cooling fins clogged.
4. Oil level too low.
5. Starter pulley fouled by grass
cuttings, etc.
1. Engine bolts loose.
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