16
WARNING: Fuel and fuel vapor are ex-
tremely flammable and explosive. Fire or ex-
plosion from misuse of fuel can cause severe
burns and even death.
To Protect Against Rust Formation During Stor-
age, Oil the Cylinder Bore:
1. Remove spark plug and pour approximately
1/2 oz (15 ml) of clean engine oil into the cyl-
inder.
2. Install spark plug and pull starter handle
slowly to distribute oil. DO NOT start engine
at this time.
3. Slowly pull the recoil starter 2 to 3 times to
distribute and coat the cylinder bore with oil.
WARNING: Unintentional sparking can
cause fire or electrical shock. Failure to observe
this warning can cause severe property dam-
age, severe burns and even death.
Disconnect spark plug wire from spark plug
and cover tip of spark plug wire with insulat-
ing tape and place wire where it cannot come
in contact with spark plug or rammer frame.
TROUBLESHOOTING
DIFFICULT TO START
Fuel is available but spark plug will not
ignite. (Power available at high tension
cable).
Ignition plug being bridge? Check ignition sys-
tem.
Carbon deposit at ignition? Clean or replace
ignition.
Short circuit due to defective insulators? Re-
place insulators.
Improper spark gap? Set spark plug gap to the
correct gap.
Fuel is available but spark plug will not
ignite. (Power NOT available at high ten-
sion cable).
Short circuit at stop switch. Check stop switch
circuit. Replace stop switch if defective.
Ignition coil defective? Replace ignition coil.
Fuel is available and spark plug ignites
(compression normal).
Muffler clogged with carbon deposits? Clean
or replace muffler.
Fuel in use inadequate (water, dust)? Flush
fuel system and replace with fresh fuel.
Air Cleaner clogged? Clean or replace air clean-
er.
Fuel is available and spark plug ignites
(compression low).
Defective cylinder head gasket? Tighten cylin-
der head bolts or replace head gasket.
Cylinder worn? Replace cylinder.
Spark plug loose? Tighten spark plug.
OPERATION NOT SATISFACTORY
Not enough power available (compres-
sion normal, no misfiring).
Air cleaner clogged? Clean or replace air clean-
er.
Air in fuel line? Bleed (remove air) from fuel
line.
Fuel level in carburetor float chamber improp-
er? Adjust carburetor float.
Carbon deposits in cylinder? Clean or replace
cylinder.
Not enough power available (compres-
sion normal, misfiring).
Ignition coil defective? Flush fuel system and
replace with fresh fuel.
Ignition plug often shorts? Clean or replace
crankcase.
Fuel in use inadequate (water, dust)? Clean or
replace muffler.
Engine overheats.
Combustion chamber? Clean or replace crank-
case.
Exhaust or muffler clogged with carbon. Clean
or replace muffler.
Spark plug heat value incorrect? Replace spark
plug with correct type spark plug.
Rotational speed fluctuates.
Governor adjustment improper? Adjust gover-
nor to correct lever.
Governor spring defective? Clean or replace
ignition.
BVC830-BVC940 manual.indd 16
23/09/16 4:13 p.m.
