MG MGB TOURER GHN5 Handbook page 30

RUNNING INSTRUCTIONS
WARNING. Exhaust fumes will be drawn into the car if it is driven with the boot
lidltailgate open, causing a health hazard to passengers and driver.
If it is imperative that the car be driven with the boot lidltailgate open, adverse
effects can be minimised by adopting the following procedure:
(l) Close all windows.
(2) Open the face vents fully.
(3) Set the heater controls to circulate the maximum amount of cold or hot air.
(4) Switch on the blower motor to maximum speed.
(5) Do not travel at high speed.
Choice of fuel The octane number of a motor fuel is an indication given by the fuel technicians
of its knock resistance (pinking). High-octane fuels have been produced to
improve the efficiency of engines by allowing them to operate on high com-
pression ratios, resulting in better fuel economy and greater power. Fuels with
an octane rating of below 97 (high compression) or 93 (low compression) are
not suitable. Should it be necessary to use a fuel with a lower octane number,
the car must be used very carefully until the correct fuel can be obtained.
Filling up When filling up with fuel avoid filling the tank until fuel is visible in the filler
w i t h fuel intake tube. Should this be done and the car left in the sun, there will be a con-
siderable risk of fuel leakage due to expansion, and consequent danger from
exposed fuel. If inadvertently overfilled and the car is to be parked, take care
to park it in the shade with the filler intake as high as possible.
The fuel tank is vented through the filler cap. UNIPART market a lockable
filler cap to fit this model.
Starting
Check that the gear lever is in the neutral position.
If the engine is cold, pull out the mixture control (choke) and lock it in the desired
position by turning the control knob a quarter of a turn clockwise. In extremely
cold conditions it may be necessary to pull the control out to its fullest extent.
Switch on the ignition, check that the ignition warning light glows and that the
fuel gauge registers, then operate the starter.
As soon as the engine starts, release the ignition key and warm up the engine at
a fairly fast speed (see 'Warming up'). Check that the oil pressure gauge is
registering and that the ignition warning light has gone out. Unlock the mixture
control (choke) and push it in completely as soon as the engine will run evenly
without its use.
See page 32 when automatic transmission is fitted.
Starter
D o not operate the starter for longer than five to six seconds.
To prevent damage the starter cannot be operated while the engine is running.
If the engine fails to start, the ignition key must be returned to the 'off' position
before the starter can be operated again.
If after a reasonable number of attempts the engine should fail to start, switch
off the ignition and investigate the cause. Continued use of the starter when the
engine will not start not only discharges the battery but may also damage the
starter.