Service Manual

Figure 2-7
3. Align the holes in the throttle bracket and
4. Insert a tight fitting pin; e.g. 1/8 in. drill bit.
5. Move the throttle control on the handle to
“fast” and tighten the cable clamp screw.
6. Back out the upper screw until only a few
threads remain in the throttle lever.
7. Install the plug wire and start the engine.
8. Using
only the lower screw, adjust the
engine speed
to 3000 RPM.
9. Now turn the upper screw until it just barely
contacts the throttle lever tang (a maximum
gap of ,020 in. is acceptable).
throttle lever.
10. Remove the alignment pin.
11. On BBC engines, set the throttle control on
the handle in the “stop” position. Bend the
grounding tang until
it just contacts the
throttle lever. See Fig. 2-8.
Governor and throttle adjustments should be
made on an as needed basis only.
Throttle Control Assembly
Figure 2-8
IGNITION
The OHV engine uses a solid state ignition
system with timing fixed at
25 degrees BTDC
2 degrees at 3000 RPM. Ignition timing is not
adjustable. However, ignition timing may
change
if a blade impact has occurred and the
flywheel key has sheared. The engine may
continue
to run with a degradation in per-
formance. Under these conditions the timing
will advance, making starting and running
difficult. The coil
to flywheel air gap is set at .38
mm (.015 in.).
FUEL SYSTEM
The fuel tank has a capacity of 1.21
L (44 oz) and
should be drained of fuel before changing oil
and at the end of each season. To drain the fuel:
1. Pull off the spark plug wire
2. Use a pump or syphon to transfer the
gasoline into a clean gasoline container.
!
CAUTION: Gasoline is highly
flammable, handle
it carefully.
Do not smoke or allow any open flame or
spark while handling gasoline.
CAUTION: Gasoline is highly flammable, han-
dle
it carefully. Do not smoke or allow any open
flame or spark while handling gasoline.
The fuel system is equipped with an 84 micron
in-line fuel filter. See Fig. 2-9.
If poor running
occurs, this filter should be examined for
contamination. There is no “in tank” filter on
this engine.
Figure
2-9
The fuel tank cap should be periodically
examined for proper venting. The cap is fitted
with a sealing disc but cannot be disassembled.
See Fig
2-10.