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Engine is hard to turn over:
1. If the engine is hard to turn over make sure the LiPo
battery in the model is fully charged.
2. The engine may be flooded. Remove the glow plug, turn
the model upside down over a rag and turn the engine
over. Raw fuel should spray out of the glow plug hole.
Replace the glow plug making sure you replace the small
copper gasket that goes on it.
3. If the engine will not turn over it is probably still new and
stuck at top dead center. Use a screwdriver to rotate the
flywheel on the engine counterclockwise until it moves
freely, turn the model off then on again and retry. It may
take several such tries to get it to start. After the engine
has been run 30 to 45 minutes you will find this will not
occur.
4. You should also refer to the R.O.S.S. operating instructions
in this manual for additional information and step-by-step
instructions.
Engine tries to start but will not run:
1. Engine may be loaded up with excess fuel inside. Pull the
trigger 1/4-inch and count to 5 before trying to start. If
starting improves repeat until the engine runs and idles.
2. Engine may be overheated. Let cool, open high-speed
needle 2 hours and retry.
3. If the fuel has been left open or is over 6 months old
try replacing the fuel including that in the fuel line.
Disconnect the red lead from the starter motor and push
the starter button for 5 seconds. Reattach the red lead
to the starter motor; apply full throttle and try starting. If
the engine starts, release the throttle immediately before
driving. If the engine refuses to start, check to make sure
there is fuel in the tank. If so, disconnect the fuel line
holding it at carburetor level pointing away from the
chassis. Turn the engine over for 5 to 10 seconds. Fuel
should run (squirt) out of the fuel line. If not check for
restrictions, holes, leaks, etc in the fuel and pressure lines.
4. If the engine refuses to start, read the “Engine Tuning”
section for more help.