2. Hot Starts
1. Hot starting does not normally require the use
of the choke or pump priming. Starting is
usually accomplished by turning on the ignition
and kicking with the throttle closed.
3. Electric Start Model
a. Close the choke halfway, turn on the ignition,
and with the throttle slightly cracked engage
the starter. After the engine starts, open the
choke and work the throttle slightly until the
engine will idle.
T
rouble Shooting Tips
Engine will not start:
● Fuel supply empty or restricted.
● Weak or no spark - discharged battery or faulty
magneto.
NOTE - We do not recommend tho use of magnetos.
● Plug gap too wide - we use .020 to .022 plug gap
on our point type ignition engines.
● Improper ignition timing.
● Tight tappet adjustment.
● Improper idle mixture and/or engine RPM setting.
● Intermediate jets or air bleeds loose.
● Improper diagnosis of a rich or lean mixture
condition. If the engine fires in the carb, it is too
lean and must be re-primed. Do not continue to
kick the engine over with the switch on until it is
reprimed. If there is no response after three kicks
or if it pops in the exhaust pipes, it is too rich.
Leave the switch on and open the throttle wide
open and kick until it fires.
C. Adjusting the Carburetor
1. Idle Circuit
a.
The idle mixture screw, Part #11-2354, is
initially set during assembly to 2
1
/2 turns out
from the fully closed position. Check this and
reset the screw to 2
1
/2 turns before attempting
to start the engine.
Never close the idle mixture screw tightly as damage to
the needle and seating area in the carburetor body may
result. The throttle stop engine RPM adjustment screw
located on the throttle arm, Part #11-2248, is initially
set by holding the throttle closed and turning the
screw until it contacts the throttle arm stop boss. At
t
his point it is turned an additional
1
/2 turn clockwise.
b. Start the engine and warm it up to operating
temperature. Adjust the engine RPM to a slow
idle, approximately 800 RPM. Then turn the
idle mixture screw in, leaning it, until the
engine starts to die. Next, turn the screw back
out, richening it, until it starts to die. A position
about halfway between these points, or a
setting of about
1
/2 a turn out from the lean side
of the range is the correct setting. From the
fully closed position this would be
approximately 2 to 3 turns. Then reset the
throttle stop screw to give final desired RPM
idle speed. Idle speeds will vary according to
the individual and the use to which the
machine is put.
NOTE: Whenever an intermediate system jetting change
is made, the idle mixture screw should be readjusted with
the engine hot.
Trouble Shooting Tips
Engine will not idle.
● Improper idle mixture and/or engine RPM setting.
● Intake manifold air leak.
● Sticky timing automatic advance mechanism.
NOTE - On those engines with spring loaded mechanical
advance ignition systems, we perform as standard
procedure to each of our motors, the following
modification: Remove and clean the timing advance
mechanism. Rebend the small springs which retard the
timing by shortening each spring
1
/16" on both ends to
increase spring tension. This will insure the engine retards
properly and returns to a smooth, low idle. We have found
that this normally cures those conditions where the motor
will not always return to a low idle and instead sometimes
idles at a higher speed, up to 1400-1600 RPM .
● Foreign material obstructing gas flow to idle circuit.
● Incorrect intermediate jetting.
5
CAUTION
(12 pages)
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