Hard starting G

I put a delco dist. on my G this spring, after a total rebuild. When starting it has weak spark and won't start. Then just as I let off the starter, it will start. Runs great after but when I go to start it again " samething happens". I bought a new battery, and used #2 welding cable to ground the battery and to the starter. Is this still a grounding issue ?
 
So the starter cranking robs enough power that you're getting a weak spark? How's the gen/dist. output? Make any difference if the petcocks are open?
 
Couldn't quite tell from your notes there, but I always ground a battery directly TO the starter mount bolt; no lost voltage between all the various frame joints and other bolts.
 
Brain fart, yes it is low voltage if it starts after letting go of button.

I would switch to 6V coil, ballast resistor and bypass. That will provide extra voltage to coil for starting.
 
I suppose a fresh rebuilt G can put a hefty load (high current draw) on a starter (especially if starter is showing its age or going bad) which may reduce battery voltage down quite a bit causing a low energy spark while cranking, although no way sititng here I can say thats your problem.

Things which can help (if? the above is the problem) may be a heavy duty battery such as say 1000 CCA minumum,,,,,1 or even 0 Gauge Battery and Ground and Starter Cables,,,,,,Try running the ground right to a starter mounting bolt,,,,, Use 12 gauge wire in all the primary ignition circuit (ammeter to switch to coil to distributor).

OTHER THINGS

Are the points and condensor new or in like perfect condition?? as a weak or bad or open condensor causes a weak spark CHECK THAT CONDENSOR,,,,,,,,,,,

The ignition switch may be resisitve TRY TO HOT WIRE THE COIL DIRECT which by passes any bad loose resistive contact switch problems.

Are you at the original POS or Neg ground??? The coils polarity should match the battery. If at Pos ground switch feeds coils - and Pos wires to distributor, reverse that for Neg ground

Since youre running a 12 volt coil theres no ballast resistor hid somewhere thats still in the ignition circuit is there??

Does the distributors advance system work right?? There shouldnt be any advance while cranking then as RPM increases the weights pull against the springs to advance the timing.

TIMING is she firing right near TDC while youre cranking ????? You need to check the timing ESPECIALLY the start/cranking timing

STARTER if the starter is going bad it can draw excess current which drastically drops battery voltage while cranking, sure the starter is okay????

ONE LAST THING its possible to use a 6 volt coil and a ballast resistor with a ballast by system which apples unballasted voltage to the coil while cranking, that really improves start spark energy.

Theres more but I have other things to get at lol

John T
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top