Troubleshooting - Hyundai HYBV26 User Manual

10. TROUBLESHOOTING

The spark plug does not
spark
The spark plug function
correctly
Problem/Scenario
Compression ratio is all ok
Engine overheating
Engine knocking or making a noise
Problem/Scenario
Spark plug
Magneto
Compression ratio OK and
fueling well
Fueling well but the
compression ratio is poor
Carburetor not fueling
Air is able to pass through
Air is able to pass through the
carburetor connection
Engine is overheating
Carbon clogged exhaust
Fuel mixture too lean
Cylinder covered with carbon
Fuel has gone stale or bad
Some engine parts are worn or
Possible cause
Spark plug electrode wet
Covered with carbon
Damaged insulation
Spark gap incorrect
Spark plug electrode burned
Damaged H T Cable
Bad coil insulation
Damage to wire coil
The electronic firing unit
is defective
Damaged H T Cable
Too much fuel in cylinder
Water or dirt in fuel, stale fuel
Cylinder piston ring
worn or damaged
The spark plug is loose
No fuel in tank
Filter gauze clogged
Tank air hole clogged
Possible cause
Filter clogged
Water in fuel
Carbon in cylinder
damaged
Page 16
Solution
Dry
Replace plug
Replace insulation
Adjust to 0.6~0.7mm
Replace plug
Repair or replace
Replace coil
Replace coil
Replace the defective unit
Repair or replace
Drain excess fuel
Replace with fresh fuel
Replace worn damaged items
Tighten spark plug
Add fuel – may require
priming
Clean
Clean
Solution
Clean filter
Tighten up to prevent air
from penetrating
Tighten up
Stop the engine and let it cool down.
When you restart it, avoid long
periods at heavy load and high revs
Drain and replace fuel
Clean exhaust
Adjust the carburetor
Clean the cylinder
Replace with clean fresh petrol
Clean the cylinder
Check and replace defective
parts
Rev 2