Engine Poor Performance; Starting Difficulties; Engine Tends To Cut-Off At Full Throttle - Gilera SMT RCR 633793 Service Station Manual

SMT RCR
Engine
Poor performance
Possible Cause
Fuel nozzles or cock clogged or dirty.
Excess of deposits on the cylinder ports and in the combustion
chamber.
Muffler obstructed
Air filter clogged or dirty.
Starter inefficient. (Remains on)

Starting difficulties

Possible Cause
Carburettor nozzles clogged or dirty.
Air filter clogged or dirty.
Starter inefficient.
Engine flooded.
Spark plug faulty or dirty.
Ignition system faulty.

Engine tends to cut-off at full throttle

Possible Cause
Air filter dirty
Excess of deposits on the cylinder ports and in the combustion
chamber
Spark plug faulty or dirty
POOR PERFORMANCE
Remove, wash with solvent and dry with com-
Descale the thermal group.
Clean according to the procedure.
Check the mechanical movement of the Starter
D
IFFICULT STARTING
Remove, wash with solvent and dry with com-
Wash with water and soap and soak again in a
mixture of 50% petrol and 50% oil.
Check the mechanical movement.
Start the vehicle keeping the throttle fully open al-
ternately making the engine run for approx. five
seconds and stopping for other five seconds. If the
engine fails to start, remove the spark plug and
make the engine run with open throttle so as to
expel fuel in excess. Refit a dry spark plug and re-
If the fuel tank is empty, refuel and start up.
Remove the spark plug and make sure it is clean
and in good conditions. Adjust the electrodes at
0.6÷0.7 mm. Replace the spark plug, if required.
Check (see the ELECTRICAL SYSTEM chapter).
L
OSS OF BLOWS
Clean according to the procedure.
Descale the thermal group.
Remove the spark plug and make sure it is clean
and in good conditions. Adjust the electrodes at
0.6÷0.7 mm. Replace the spark plug, if required.
Bear in mind that many problems engines have
derive from the use of the wrong spark plug.
Troubleshooting
Operation
pressed air.
Replace
control transmission.
Operation
pressed air.
peat the procedure.
Operation
TROUBL - 31