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No spark at points need help fast

S

SteveinMo

Member
So I was setting the gap on my points today, Massey Ferguson 245 gas. My help left the ignition switch on when he was turning the motor over to get the high spot on the disturber cam. When I put the feeler guage in I got a strong spark. Now I have no spark on the points when I crank the motor.

What did I burn up, the condenser? Help I need this unit running now.

Thanks for the help.
 
I know this might not be the correct thing, but one of those new hundred-dollar bills is pretty gritty, sort of sand-papery. Don't know why.
 
What you did didn't burn ANYTHING up.

Likely, either the points are gapped wrong and not closing 100% or there's oxide, oil, or debris on the points preventing them from making contact. ANY residual oil on the feeler gauge, or even a fingerprint can cause this.

If gap is OK, with points "closed", draw a clean white strip of paper "cardstock" through the points a number of times to burnish them, then, turn engine over so points are "open" and clean with a blast of spray electrical contact cleaner and allow to air dry before again checking for spark. (If no electrical contact cleaner, a squirt of starting fluid will work, just observe cautions on the label as to flammability for obvious reasons.
 
2 days ago my AC D14 had no spark same as what you are seeing. I filed them, Emory clothed them and cleaned them with paper numerous times with no results. I took the points out of the distributor and then I saw that they were pitted. We actually used the bench grinder and carefully smoothed out the pits. Put it back together and it fired right up. Could that be what you have?
 
Take a popcicle stick or other insulated flat bladed item and toggle the points open repeatedly. Make sure the points are in the closed position and where the rubbing block is on a flat part of the distributor cam.

You should be getting an audible and visible spark coming from the high tenion lead on the coil center. It would be a good idea to use a cloths pin or such to anchor the lead end about 1/4 inch from a spot on the block.
 
Got a test light? See if you have power to points when open and close. You can crank it over and it should pulsate. If it stays on then points are not making contact and need gap set or cleaned. I use fine sand paper then a newish clean bill.
 
If you clean the points with a solvent be sure to use a suitable grease to lubricate the cam lobes or the rubbing block will have a short life.
 
If you use an abrasive strip to clean the points take them out first. Abrasive dust can get into the distributor if you don't remove them. It is best to use a point file (automotive store) if you have to file them in place.
 
if the points were left open nothing will happen. if closed they will burn with switch on. so what was it? how long was switch left on? a momentary spark is nothing to worry about.
 
My favorite points buffer is a strip of brown kraft paper bag. It leaves no residue.
 
Spray wd40 on the points. Sounds crazy but it works. I have an old pay loader I used maybe once a year, never has spark until I spray wd40 on the points then it fires right up.
 
Steve, so often the cause of no fire is the points, either burned or pitted or coated or mis gaped or not fully opening and closing CHECK POINTS FIRST. Maybe clean/buff/polish them and check gap.

If all else fails and you want to determine the cause of no fire work through my Ignition Troubleshooting Procedure can help. A simple test it to place a test lamp on the coils to dist output and turn ign on and crank her over and the light MUST flash ON (points open) and go total OFF (points closed) SEE BELOW

http://www.ytmag.com/cgi-bin/viewit.cgi?bd=farmall&th=5745

John T
John Ts Ignition Troubleshooting
 
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