Paul
You may need to Ground the engine to the airframe ground.
Jim Brown
paul atkinson wrote:
>
> Can anyone shed any light on the following.
> Until recently I have been powering my stationary ship with an old car
> battery. When I tried to operate the starter on my 912s for the first time
> there was a sound like a machine gun from the starter contactor and that
> was all. I immediately jumped to the conclusion that the battery was not
> up to the job and bought myself a "proper" one. With the new one installed
> I have the same problem, which pointed me to my wiring as the most likely
> cause. I have made up my fat wires (2awg) with soldered terminals. I have
> checked the resistance of all these and the highest reading I get is 0.6
> ohm on a 2.5m cable. I am not sure how much this means because my
> multimeter is not very accurate at this level.
> I have tried operating the contactor with the starter disconnected and it
> makes a healthy clunk each time the starter button is pressed or released.
> I have also removed a plug from each cylinder to give it a fighting
> chance, but so far it has not been persuaded to do the job it is paid for.
> The new battery is still in a good state of charge.
> Is there is any better way of checking that my wiring is up to the job, or
> any other suggestions as to the cause of the problem.
>
> Thanks
>
> Paul Atkinson
>
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