FOURTH TANK OF FUEL
FIFTH TANK OF FUEL
TUNING TIPS
ENGINE CARE
Lean the main mixture control needle a further ½ turn. Run the car for the tank of fuel and
let cool. At this stage you should notice the car is running much smoother and the engine
will be producing more power.
At this stage your engine will require very small adjustments to the main mixture control
needle. Differences in temperature, humidity, and air pressure will all have a direct effect
on the settings required. Please be aware that it is very unlikely that you will cause damage
to your engine if it is run slightly “rich”. However damage to the engine will result over a
longer period if it is run slightly lean. If your engine is run at a very lean setting it will be
severely damaged almost immediately. We therefore recommended that you run your car
at the richest setting possible that allows for good throttle performance and power levels
without overheating. If in doubt please contact your hobby retailer for further advice.
After the break-in process has been completed, the best way to ensure optimum performance
from your engine is to fine tune it in conjunction with a laser temperature gun. We recommend
the use of the Century UK – BSD laser gun, part No. BS-B7078
Tune the engine so it makes good power, then using the laser temperature gun
fine tune the engine so the temperature of the cylinder head is consistently
below 270F (132C)
Model engines will take a few minutes to reach optimum operating temperature.
Never attempt to tune a cold engine.
Never store the car with fuel left in the tank. We recommend that after the final run of the day
you empty the fuel tank and run the engine at idle until it stops. Then remove the air filter and
glow plug from the engine. Place two drops of after run engine oil into the carburettor and the
cylinder. Then pull the recoil starter several times to circulate the oil. Replace the air filter and
glow plug.
WAYS TO ENSURE GOOD PERFORMANCE AND LONG LIFE FROM YOUR ENGINE
Keep the engine and air filter clean. Dirt on the engine will act as an insulator and the engine
will run hotter.
Do not “over-lean” your engine. Remember you are very unlikely to damage the engine by
running a slightly rich mixture setting.
Do not run the engine with little or no load, or when the wheels are
not in contact with the ground.
Do not allow the engine to get excessively hot.
Do not use fuel with a low oil content, or nitro content in excess of 25%
Do not use old or stale fuel.
Never insert tools into the engine. If you need to remove the flywheel for maintenance
purposes always use a special flywheel wrench to prevent the crankshaft from moving.
We recommend that you store your car in a warm and dry environment. Avoid storing the car
in a garage or shed, as the car will be exposed to extremes of temperature.
Do not allow water to enter the engine. This sounds easy, but you should be aware that
temperature changes will cause condensation to form inside the engine. This is another
good reason to use after- run oil.
Never use silicone sealant on the engine joints. Silicone sealant contains acetic acid which is
highly corrosive to the internal parts of the engine.
