User Manual Torro 1:10e Nitro Trophy Truck 4Wd RTR - Blue

9
Cooling Problems
Engine overheating is most often caused by running the engine too lean or
because the cooling air for the cylinder head is blocked. If the mixture is too
lean, simply allow the engine to cool, richen the mixture and try it again. Bodies
must have holes cut in them to allow for cooling air to circulate over the sur-
face of the cylinder head. On most bodies, it is a good idea to cut part of the
wind-shield out and part of the back window to allow for additional cooling.
Factory Settings for Force .18
All new engines are assembled with what we will term ‘factory settings’. These
settings should allow almost all engines to be started up and allow for minimal
adjustment for running in purposes.
Bearing this in mind, we are oering you the opportunity of re-adjusting to the
‘factory settings’ based on engines currently held in stock.
Main Needle Valve – High Speed Adjustment (HSA)
Screw down until resistance is met, and no further movement is apparent. RE-
OPEN 3 1/4 TURNS.
Throttle Adjustment Screw – Idle Adjustment (IA)
Gently shut o carburettor sliding body and slowly re-open by means of ad-
justing screw.
ADJUST SCREW UNTIL APPROX 1 or 1 1/4mm OF APERTURE APPEARS
BETWEEN THE END OF THE THROTTLE BODY AND AIR INTAKE APERTURE.
Sub Throttle Needle Valve –
Low Speed Adjustment (LSA)
With adjustment screw setting in place, close o the throttle body against the
screw. Very gently screw in the needle valve until it closes o the supply fuel
nozzle and is prevented from re-opening by the entry of the needle valve into
the centre hole of the fuel nozzle (work with great care with this one - we are
only looking for minimal frictional contact between both parts).
RE-OPEN VALVE 2 1/2 TURNS.
Glossary of Carburettor Functions
Main Needle Valve (High Speed)
The main needle mixture screw controls how much fuel enters the engine dur-
ing mid- to high-speed operation. The screw is turned clockwise to lean (less
fuel) and anti-clockwise to richen (more fuel)
Sub Throttle Valve (Low Speed)
This screw meters the fuel at low speeds. The low-speed mixture screw is
located in the end of the carburetor, inside the throttle arm.
This screw controls how much fuel enters the engine at idle and low throttle.
This adjustment will smooth the idle and improve the acceleration to mid
speed. Make this adjustment with the throttle closed, after setting the idle. The
screw is turned clockwise to lean (less fuel) and anti-clockwise to richen (more
fuel)
Throttle Adjustment Screw
The throttle adjustment screw regulates the throttle opening to control the idle
speed. The screw is turned clockwise for a higher idle speed and anti-clock-
wise for a lower idle speed.
HSA
IA
LSA
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