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Piston sticks at the top of the container (new engine).

The piston's laissez-faire interior the piston enclosure is so tight, there is no liberty for the piston to skid to the top. The solution is to boil up the piston chamber near a hair drier or grill gun. This will build up the chamber, allowing the composer to slither smoothly, while maintaining well behaved compaction.

Nitro engine dies as in a minute as you draw it off the electric motor box

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If your RC car is decently tuned, your difficulty is likely a loose clasp nut . The litter nut is what connects the regulator to the rotating shaft. Pressing descending your RC car on the starter motor box presses the take hold of nut antagonistic the fly wheel, creating the turn round that gets your nitro started. However, if your hold nut is loose-fitting from deterioration and opening or impacts, it won't have the straitlaced netting it needs to livelihood the car moving quondam you have abstracted your vehicle from the electric motor box. To see if you have a floppy take nut, visage for the fly controls spinning on it's own. If it does, you entail to expurgate the motor and fasten or renew the clasp nut.

Engine stalls when car put on the floorboards.

A frost-bound clutch-bell good posture or unsound clutch-retainer springtime is the most credible perpetrator. The engine seating because the taking hold is occupied when the motor is inactivity. When you put the car on the soil the engine croaks as it is not running blistering ample to shuffle the car. The consideration spring or take bell load-bearing are forcing the take hold of to be unavailable when it shouldn't be. You'll call for to see both surround and fix or renew as obligatory.
Car engine moving rearwards.

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This is a undivided problem, beside an undemanding fix as it is ever caused by soul errors. Make convinced you put your RC car on the starter motor box next to the accurate location and that you put your wires on the true poles of the battery-operated.
Your motor dies time warm up.
The record possible mete out of this is a worm-eaten walter piston and/or cylinder sleeve. When the engine is cold, densification is satisfactory to get it started and run nicely. As it warms up the fit between piston and arm loosens up as the cloth covering expands. If the fit is bad enough, your fuel can going away the cylinder above the piston. As the engine gets warmer, this result gets worse until the motor sooner or later seats. You'll demand to replace the engine or, if you suchlike in work on this description of thing, the piston and sleeve.
Your roto-start or pullstart nitro won't set in train.

Your one-way attitude may not be transmittable on the tender shaft. This can hap if it is absolutely greasy and you can mop it , let it dry overnight, and re-install it.

Your motor lick increases spell inactivity.

Other information:

Highly presumed that the low dash plunger on the engine is set too slender-waisted . A respectable corroboratory check is to tug the substance band and occurrence how longitudinal the engine runs. If untold less than cardinal seconds it's too lean, if considerably long than 5 seconds, it's too abundant.