321S15/25
GB-19
Problem
Possible causes
Remedy
Engine will not start
Electrode spark plug is wet or
fouled
Clean or replace the spark plug
Cracked spark plug insulator
Replace the spark plug
Incorrect spark plug gap
Adjust gap 0.6 - 0.7mm
Engine ! ooded
Crank engine with choke open and full throt-
tle to clear excess
fuel
Incorrect or stale fuel
Drain and replace with correct fuel/oil mixture
No fuel in tank
Refuel with correct fuel/oil mixture
Insuf" cient power
Clogged air cleaner
Clean and lubricate air cleaner
Fuel line/passage clogged
Contact Service Centre or see Authorized
Dealer
Carbon build up in muf! er
Contact Service Centre or see Authorized
Dealer
Use incorrect or stale fuel
Drain and replace with correct fuel/oil mixture
Piston seizure
Contact Service Centre or see Authorized
Dealer
Machine is overworked
Operate properly - do not overload
Engine stops during opera-
tion
Switch is bumped
Restart the engine
Shorting of spark plug
Clean spark plug or replace
Piston scored
Contact Service Centre or see Authorized
Dealer
Fuel tank is empty
Refuel with correct fuel/oil mixture
Carburettor or fuel tank clogged
Contact Service Centre or see Authorized
Dealer
Engine is dif" cult to stop
Stop wire disconnected from the
switch
Attach stop wire to switch
Overheated engin
Contact service centre or see Authorized
Dealer
Unit main body
Loose engine and/or pump
mounts
Retignten engine and/or pump mount screws
Tank leak
Contact service centre or see Authorized
Dealer
Leak at the tube connections
Retignten the hose clip or replace if dam-
aged
Pump is no spraying
No chemical diluted liquid in the
sprayer tank
Fill the sprayer tank
Valves inside the pump clogged
Contact Service Centre or see Authorized
Dealer
Cock valve blocked
Clean the cock valve or replace
Incorrect pressure setting-too low
Adjust the pressure regulating dial
Pump is worn out or damaged
Contact Service Centre or see Authorized
Dealer
Spray rod nozzle clogged
Clean the nozzle
TROUBLESHOOTING