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Thread: Kohler 141T engined rotovator

  1. #1
    Should Get Out More balbas's Avatar
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    Default Kohler 141T engined rotovator


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    I've been asked to look at the father in law's rotovator. It used to run, now it doesn't.

    It does have compression
    It doesn't have spark

    so I thought I'd start with the obvious. There's an on/off switch on the bars. one wire goes to earth, the other goes to a union with a wire from the points, one from the condenser and one from behind the flywheel (where there's a Hall effect? generator). Doing a continuity test between that union and the frame of the rotovator gives me continuity no matter what position the switch is in.

    So I'm thinking that somewhere I have a short in the ground wire and it's not sparking because the coil etc are constantly earthed. Would that be right?

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    Should Get Out More Ant's Avatar
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    Default Re: Kohler 141T engined rotovator

    Quote Originally Posted by balbas View Post
    I've been asked to look at the father in law's rotovator. It used to run, now it doesn't.

    It does have compression
    It doesn't have spark

    so I thought I'd start with the obvious. There's an on/off switch on the bars. one wire goes to earth, the other goes to a union with a wire from the points, one from the condenser and one from behind the flywheel (where there's a Hall effect? generator). Doing a continuity test between that union and the frame of the rotovator gives me continuity no matter what position the switch is in.

    So I'm thinking that somewhere I have a short in the ground wire and it's not sparking because the coil etc are constantly earthed. Would that be right?
    There's a union involved, there's bound to be trouble.

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    Should Get Out More demographic's Avatar
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    Default Re: Kohler 141T engined rotovator

    Quote Originally Posted by balbas View Post
    I've been asked to look at the father in law's rotovator. It used to run, now it doesn't.

    It does have compression
    It doesn't have spark

    so I thought I'd start with the obvious. There's an on/off switch on the bars. one wire goes to earth, the other goes to a union with a wire from the points, one from the condenser and one from behind the flywheel (where there's a Hall effect? generator). Doing a continuity test between that union and the frame of the rotovator gives me continuity no matter what position the switch is in.

    So I'm thinking that somewhere I have a short in the ground wire and it's not sparking because the coil etc are constantly earthed. Would that be right?
    Dunno about that particular killswitch setup but most motocrossers killswitches shouldnt have continuity with the frame unless the button is depressed so yeah it seems yer on the right track.
    some twostroke roadbikes worked the same and the ignition switch in the off position just earthed the ignition.
    Me and a mate found that out one time when we had the connectors disconected in his GP100 headlight and the bike would start without the key even in the ignition. Think KMXs were the same.
    Not exactly a security feature...

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    Should Get Out More balbas's Avatar
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    Default Re: Kohler 141T engined rotovator

    Right, it looks like they actually want me to fix this thing. Has anyone got a wiring diagram for a simple single cylinder petrol engine kicking around? I'm going to have to try to work out where the fault lies.

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    Should Get Out More mrlongbeard's Avatar
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    Default Re: Kohler 141T engined rotovator


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    Default Re: Kohler 141T engined rotovator

    Run the wire from the points/condensor directly to the ignition coil and make sure the coil has a direct earth and see if it sparks ?

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    Annoying The Idiots Yorick's Avatar
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    Default Re: Kohler 141T engined rotovator

    Quote Originally Posted by demographic View Post
    Me and a mate found that out one time when we had the connectors disconected in his GP100 headlight and the bike would start without the key even in the ignition. Think KMXs were the same.
    Not exactly a security feature...
    Lots of Yamaha RDs were the same.

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