THUNDER TIGER TOMAHAWK ST Manual page 15

Glow Plug Problems.
The glow plug in your engine must
be replaced periodically to maintain
peak performance and easy
starting. Most starting problems
or erratic performance can be
traced back to the glow plug. The
easiest way to check for a faulty
glow plug is to simply install a new one and see if the problem
is corrected. However, to test the glow plug, remove the glow
plug form the cylinder
head with a 5/16" nut driver (make sure there is no dirt
on top of the head which could fall into the engine. Do not lose
the copper gasket which seals the glow plug.)
Connect the glow plug to the glow igniter. All of the coils should
glow bright white. Sometimes, the first few coils will not glow,
while the rest are bright orange. This indicates a bad glow
plug or low igniter battery. Try recharging the igniter, or replacing
the glow plug.
Flooding
Symptoms of a flooded engine include difficulty in starting,
muffled sounds coming from the exhaust, pull starter won't
operate, and excess fuel draining from the exhaust outlet.
Remove the glow plug with a 5/16" nut driver and also remove
the air cleaner. Turn the car upside down and pull the starter
a couple of times to drain the excess fuel out of the engine
and carburetor. Re-install the glow plug and try starting again.
Fuel Mixture
The fuel mixture is controlled by three different adjustments
on the carburetor, and should come preset from the factory
(see photos below). Your engine should
start and run slightly rich with these settings (rich is good
for break-in). Tuning Tip: Always make sure you can see
some exhaust smoke coming out of the exhaust outlet
during operation. This is a good sign that enough fuel is
getting to the engine.
Factory Carburetor Settings.
Low speed mixture
Idle Screw
1/2
6 turns out
Clockwise=Leaner
Richer
Counterclockwise-Richer
1/2
6
Low Speed Leaner
Screw
0.5~1mm Idle speed:
0.5~1mm)
Adjust Idle Screw until
0.5~1mm is obtained.
High speed mixture:
3 1/2 turns out
Clockwise = Leaner
Leaner
Counterclockwise-Richer
(Less Fuel)
3 1/2
Richer
(More Fuel)
0.5~1mm