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  1. #1
    bleufox6's Avatar
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    HPI RTR motor will not crank

    The new motor has a new glow plug, good nitro fuel, new roto starter with charge and then ... nothing. The rotor sarter wont crank the motor. It just catches and wont turn it...it is like something is jammed inside the motor...Any solutions? Please help!

  2. #2

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    RE: HPI RTR motor will not crank

    This sounds like a classic case of a flooded engine. The engine floods with fuel and causes something we call Hydro Lock.

    Clean all of the dirt around the glow plug with Nitro Cleaner than pull the glow plug. After you pull the glow plugstuff a little bit of paper towel down into the head.This is to keep you from getting fuel into your eyesor spraying fuel everywhere. Run the roto start a few times to clear the fuel from the engine.

    Reinstall the glow plug. Make sure the Roto Start battery is fully charge and the Glow plug is good than attempt to restart the engine.
    Revo, TMaxx, HPI Trophy, RC10T4SE, RC10B4SE, RC10GT2, MTX-3, TC4, RC10T3, Grasshopper, JR, Spektrum

  3. #3
    1QwkSport2.5r's Avatar
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    RE: HPI RTR motor will not crank

    Chances are that new engine is ABC construction so a heat gun may be in order to get the starter to kick the engine over TDC.

    Get the engine up to 150-180 degrees F, then crank it up. Should fire much easier this way.
    GlowHead Brotherhood #3
    Using Dynamite, Enya, Fox, Jett, K&B, SH, Super Tigre, Thunder Tiger, and Traxxas engines.


  4. #4

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    RE: HPI RTR motor will not crank

    This guy is Hawaii so the outdoor temps will be warm this time of year

    He just flooded it not uncommon with a new engine he might just alsoneed to charge his Glow Plug Igniter since he says his glow plug is new and clear the engine of fuel. Forgot to mention it in the first post.
    Revo, TMaxx, HPI Trophy, RC10T4SE, RC10B4SE, RC10GT2, MTX-3, TC4, RC10T3, Grasshopper, JR, Spektrum

  5. #5
    Community Moderators Foxy's Avatar
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    RE: HPI RTR motor will not crank

    Read your manual.

    No offense intended, but this problem is covered in the troubleshooting section. As others have said, it is likely 'flooded'. Take out the glow plug turn the car and engine upside down to get excess fuel out, leave the glow plug off for a few minutes, prime the engine ONLY until the fuel just disappears into the carb, then put the glow starter on. Despite living in a warm climate, it still may be worth heating the motor up using a powerful hair dryer or hot air gun, it will just make things easier. Another tip for starting new engines is not screwing the glow plug in all the way. When you put the glow plug back, wind it all the way, then back it out just a half turn. This will not prevent the engine from firing, just release some of the pressure on the piston when its at TDC. Once it's running, tighten it up.
    Down with the crew known to pump up the bass...
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  6. #6
    1QwkSport2.5r's Avatar
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    RE: HPI RTR motor will not crank

    I have an AAC engine that gets stuck before TDC even when it's 100*F, so ambient ambient temps mean little.


    The engine could be flooded too I suppose.
    GlowHead Brotherhood #3
    Using Dynamite, Enya, Fox, Jett, K&B, SH, Super Tigre, Thunder Tiger, and Traxxas engines.


  7. #7
    bleufox6's Avatar
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    RE: HPI RTR motor will not crank

    Yes I am in Hawaii, and thank you all for the abundance of information.  I should reiterate though about the "turn over" of the engine.  The rotostarter physically locks up in the starting port of the motor.  It has a full charge and works properly.  As soon as it is inserted, it just locks up.  It seems to be a mechanical issue. The motor just doesnt physically turn.

  8. #8
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    RE: HPI RTR motor will not crank

    As others noted, it sounds flooded. It's real easy to flood with a roto-start. Have you tried turning it over with the glow plug out?
    Mugen MBX6R, HB D8T, Losi 8 2.0, Savage X 4.6, Losi 810, Hyper 7, Exceed Forza
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  9. #9

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    RE: HPI RTR motor will not crank


    ORIGINAL: bleufox6

    Yes I am in Hawaii, and thank you all for the abundance of information. I should reiterate though about the "turn over" of the engine. The rotostarter physically locks up in the starting port of the motor. It has a full charge and works properly. As soon as it is inserted, it just locks up. It seems to be a mechanical issue. The motor just doesnt physically turn.
    Did you install the Roto start yourself or was it factory installed? Has the engineever turned overwith the roto start system?Can you run the Roto Start without the Glow Plug installed?

    Just a few extra thoughts.
    Revo, TMaxx, HPI Trophy, RC10T4SE, RC10B4SE, RC10GT2, MTX-3, TC4, RC10T3, Grasshopper, JR, Spektrum

  10. #10
    bleufox6's Avatar
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    RE: HPI RTR motor will not crank

    I figured out that the piston and sleeve are somehow jammed and the the piston shaved metal off the inside causing the it to not move any further. A brand new engine and its just F&^%d.  Royally.  This is not good.  I'm not giving up on HPI but I am very close.  It was the first crank on the new engine and it seizes...

  11. #11
    Community Moderators Foxy's Avatar
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    RE: HPI RTR motor will not crank

    They'll warranty it for you. Please let us know how that goes.
    Down with the crew known to pump up the bass...
    We rock the joint at a cool, steady pace.
    Foxy
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  12. #12
    bleufox6's Avatar
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    RE: HPI RTR motor will not crank

    Will do Foxy!

  13. #13
    bleufox6's Avatar
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    RE: HPI RTR motor will not crank

    Foxy,

    Called HPI yesterday and they are sending out a completely new motor at no cost.  Excellent customer service.  They really redeemed themselves and look forward to more business with them.


  14. #14
    Community Moderators Foxy's Avatar
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    RE: HPI RTR motor will not crank

    Very good to hear. Great result.
    Down with the crew known to pump up the bass...
    We rock the joint at a cool, steady pace.
    Foxy
    RCU Community Moderator


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