Troubleshooting - Engine Will Not Start
Article #542313
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- Engine stuck at Top Dead Center (TDC)
- If engine will not rotate, or if engine has not been started before, you may need to Release the engine from TDC.
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- EZ-Start® battery not charged
- Use a freshly charged battery If you've been trying to start the engine for a few minutes, recharge your battery again for maximum voltage.
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- Glow plug fouled or weak
- Check for "glow plug" light when EZ-Start® is inserted into car and the button is pressed. Test and/or replace glow plug. Replace with Traxxas #3232X glow plugs.
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- Engine not primed
- Force fuel into the carburetor by Priming The Engine.
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- Fuel flow blocked
- Check that the red fuel clip (if equipped) is released and that all fuel lines are clear with no pinhole leaks. Check for dirt blockage in the carburetor fuel inlet, high speed needle seat, or the inline fuel filter.
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- Roller clutch bearing
- The roller clutch (one way bearing, or OWB) may be slipping or is stuck on the starter shaft inside the EZ-Start. Clean or replace Roller Clutch.
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- Engine stuck at wide open throttle (WOT)
- Make sure the transmitter is set up properly, and that your carburetor is set at idle when the throttle trigger is at neutral. Take the air filter off and look into the carburetor. The gap or opening should be about 1-2mm wide at idle. Retune your 2.5 / 3.3 or Pro .15 engine
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- Improper or contaminated fuel
- We recommend Traxxas Top Fuel Power Plus. Fuel must be fresh. Replace fuel.
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- Out of fuel
- Fill fuel tank with fresh nitro fuel
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- Blue glow plug wire loose from glow plug
- Crimp the connector on glow plug wire and make sure connection is secure. If wire is damaged, replace or repair the blue glow plug wire
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- Yellow EZ Start wire disconnected
- This is the grounding wire for the glow plug. Ensure that it remains undamaged and bolted to the engine mount.
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- Carburetor incorrectly adjusted
- Readjust carburetor to factory break-in settings .
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- Exhaust blocked
- Clear any obstructions or replace the exhaust pipe if necessary
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- Broken clutch shoe spring
- The clutch may be dragging, preventing the engine from starting. Inspect or replace clutch shoe spring
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- Air bubble in fuel line
- Prime the engine to force air through. / Check for pinhole leaks in the fuel line.
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- Loose flywheel
- Replace flywheel nut
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- Engine excessively worn
- Repair or replace engine through the Traxxas Engine Replacement Plan.
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- Engine incorrectly assembled
- If the engine was recently rebuilt, verify that it was reassembled properly as shown. Here ishow to rebuild the TRX 2.5/3.3 engine.
