Carburetor Controls (11J); Installation - O.S. engine MAX-18CV-RMX Owner's Instruction Manual

CARBURETOR CONTROLS ( 11J )
Three adjustable controls are provided on this
carburetor.
The Needle-Valve:
For adjusting the mixture strength when the throttle
is fully open.
The Mixture Control Screw:
For adjusting the mixture strength at part-
throttle and idle speed, to obtain steady idling
and smooth acceleration to mid speeds.
The Throttle Stop Screw:
For setting the minimum idle speed:
Needle Valve
Throttle
Stop Screw
Mixture Control Screw

INSTALLATION

1.
Make sure that the engine mounting beams
in the hull are parallel, with their top
surfaces in the same plane. If they are not,
the engine will not rest firmly as the engine
mounting faces (undersides of the mounting
lugs) are precision machined to be flat and
in the same plane. Poor installation may not
only cause vibration, erratic running and
loss of performance, but may also damage
the engine itself by
crankcase, cylinder, etc.
The mounting beams and adjacent hull
2.
structure should be as rigid as possible so
that the engine may develop its full
performance. Use 3mm steel screws, such
as Allen socket-head type, with locknuts, for
bolting the engine to the mounting beams.
As delivered, the engine has its carburetor
lightly installed into the intake boss. Secure it
as follows.
NOTE:
Readjustment may
be necessary, occa-
sionally to allow for
changes in fuel, gear
ratio or clutch en-
gagement point.
12
deforming the
13
INSTALLATION OF THE CARBURETOR
1. Loosen the retainer screw, rotate the
carburetor to its correct position and make
sure that it is pressed well down into the
intake boss, compressing the rubber gasket,
before retightening screw.
2.
Rotate the retainer screw gently until it
stops, then tighten a further 60-90˚.
Do not overtighten the screw as this will
damage the carburetor body.
Rotate the retainer nut
Tighten a further 60-90˚
gently until it stops.
3. If the holes in the mounting beams do not
align exactly with the engine's mounting
lugs, enlarge them slightly with a needle file
so that the mounting screws pass through
the holes smoothly without being forced.
Chamfer inside edges of bearers.