Richard Lambert Posted September 25, 2018 Report Share Posted September 25, 2018 Hi all again I have just fitted a power spark ignition system to and while trying to start her I noticed a spark jumping from the accelerator linkage to the chassis its a strong spark like you would want from a spark plug and leaves the linkage very hot the engine has not started when it sparks the engine stops turning I connected the red lead to the + and black to - on the coil and white-ish lead to + Should there be a earthing there earthing strap from engine to chassis Any ideas Thanks Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 25, 2018 Report Share Posted September 25, 2018 This sounds like you have an engine tomchassis/battery earth missing When you crank it all the associated things like choke speedo and throttles act as the main earth There has to be a cable between engine and chassis somerines at the front engine mount but preferably off the clutch hsg bolts to the main battery terminal or the battery body earth Pete Link to comment Share on other sites More sharing options...
Richard Lambert Posted September 25, 2018 Author Report Share Posted September 25, 2018 Thanks Pete I thought as much as there is no earthing strap from the engine anywhere only from battery going to fit one today. Link to comment Share on other sites More sharing options...
JohnD Posted September 25, 2018 Report Share Posted September 25, 2018 Recommend use of the same cable as goes to the starter. That earth cable has to carry the same current when you use the starter! J. Link to comment Share on other sites More sharing options...
Anglefire Posted September 25, 2018 Report Share Posted September 25, 2018 I forget the size but you can get them pre-made up (or you can for the spitfire!) other than that something like a 25mm2 welding cable would be suitable. Welding cable because it’s flexible and takes some decent current. You would have to fit a lug on the one end to the bell housing and a battery clamp to the other. Unless you have the right kit to make off the cables properly, I would suggest getting premade. Link to comment Share on other sites More sharing options...
Richard Lambert Posted September 25, 2018 Author Report Share Posted September 25, 2018 Cable fitted spark gone now to get the old girl started thanks all 1 Link to comment Share on other sites More sharing options...
dougbgt6 Posted September 25, 2018 Report Share Posted September 25, 2018 What about the car? db 1 Link to comment Share on other sites More sharing options...
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