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Clearing a Flooded Engine
If the engine is primed for too long during startup, then it can
become flooded with fuel. When the engine is flooded it will no
longer turn due to excess fuel in the combustion chamber preventing
upward movement of the piston. Use the following procedure to clear
a flooded engine.
1. Remove the blue glow plug wire.
2. Remove the glow plug and gasket with the glow plug wrench
supplied with your model. A 5/16 or 8mm nut driver will also work.
3. Turn the model upside down and plug in the EZ-Start controller.
4. Push the EZ-Start button for several seconds to clear the engine
of excess fuel. Do not look into the glow plug hole while the
engine is spinning or you could spray fuel into your face!
5. Turn the model over and reinstall the glow plug and gasket.
6. Reconnect the blue glow plug wire to the glow plug.
7. Reconnect the EZ-Start controller.
8. Do not prime the engine. Pull the throttle to 1/2 throttle and push
the EZ-Start button. The engine should start immediately.
Piston stuck at "top dead center" (TDC)
"Top dead center" is the position where the piston is at the very top of
the tapered sleeve. Occasionally an engine can get "stuck" at this
position. This is most likely to happen on new engines during break-in,
but can also happen at other times. If the engine is stuck at TDC, use the
following procedure to release the piston from the sleeve:
1. Remove the glow plug using the included tool or
5/16" nut driver and verify that the piston is at the
top of its stroke.
2. Turn the Jato over and locate the flywheel through
the cutout in the chassis. Insert a flat blade
screwdriver as shown between the chassis and
flywheel. Using the chassis for leverage, rotate the
flywheel counterclockwise by pressing down on the screwdriver.
The flywheel will turn, unsticking the piston from the sleeve.
The TRX 3.3 Racing Engine
3. Put two or three drops of light machine
oil into the glow plug hole to lubricate
the piston and sleeve. Do not use too
much oil. It will hydro-lock the engine.
Verify the starter will spin the engine
with the glow plug out.
4. Rotate the flywheel so the piston is at
bottom dead center and replace the
glow plug with gasket. Reconnect the
blue glow plug wire.
5. You should now be able to start
the engine with the EZ-Start.
Top Dead Center
Bottom Dead Center
Jato 3.3 • 27
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