Re: Hard Starting - Where to go now?

Posted by HH56 On 2012/7/3 8:44:14

If gas issues are ruled out, one other thing might be measure the voltage across battery sitting and then while cranking. Then measure at battery solenoid connection and at coil terminal (I know that one will be hard with the 47 configuration) to ground both sitting and while the starter is turning over. When hot in particular but maybe both engine cold and hot to see if any difference.

6 volt systems are unforgiving of poor grounds, too small a battery, a wire, or connections in general. If the hot engine is causing enough load or the starter or battery has dropped in efficiency, the starter will need to pull extra current. The least little resistance and there may not be enough left at coil to provide a strong spark. I would expect the solenoid terminal to drop to maybe 5 under load and if coil is much lower than that, it may not have a spark that can jump the plug gaps.

I think even with the new loom, the pertinent wiring and some of the grounds will still be old.