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Re: No spark

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11-08-2013 08:23:06

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I guess I should have described things better. The tractor was converted to 12 volt system before I bought it 2 or 3 years ago. It ran great till a couple months ago when I couldn't get it started. I've replaced the dizzy cap, rotor, points and condensor. I've pulled the plugs and sometimes get blue spark that goes to no spark at the plugs that are grounded to the engine block. while I'm turning the engine over with the plugs out. I replaced the starter because it was beyond working right, worn out and turning slow. I pulled everything off the dizzy, cap, dust cover,rotor, clip and turned the key so the engine turned over. The points sparked blue so I"m thinking something is breaking down between the points and the plugs. Any idea where to start looking?

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11-08-2013 11:09:15

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 Re: No spark in reply to dyoungen, 11-08-2013 08:23:06  
1, your posts tells me you have a key to start system. I do not reccomend those. the machine can start in gear and hurt/kill you or somebody else.

hotwire the coil and then recheck spark.

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11-09-2013 09:12:48

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 Re: No spark in reply to soundguy, 11-08-2013 11:09:15  
Just to make sure I hoked up the coil right I have the "+" plus terminal going to the Dizzy and the - negative terminal going the other way. I haven't followed the negative terminal wire so I"m not sure where it goes. If I"m right or wrong let me know one way or the other. THANKS!!!

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11-09-2013 12:56:57

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 Re: No spark in reply to dyoungen, 11-09-2013 09:12:48  
in good habbit, match your round coil to the battery polarity. thus if positive ground, thent he + on the coil to the points.

( PPP ) - Positve, Plus, Points

if it is neg grnd.. then the - to the points.

in practice. it WILL work both ways.

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11-13-2013 09:54:43

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 Re: No spark in reply to soundguy, 11-09-2013 12:56:57  
The tractor was converted to 12 volt negative ground before I bought it so I"m keeping it that way. It ran fine for a couple years after I bought it so I"m not changing anything like the ground system. I ordered a tuneup set from the Ford dealer today so we'll see what happens there. I went to the parts store to get the dist cap but when I took it out of the box I could see that wasn't going to work. It was small enough to almost fit inside the original cap. Not going to even try that one.

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11-13-2013 10:10:48

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 Re: No spark in reply to dyoungen, 11-13-2013 09:54:43  
if you an alt you have to keep the neg polarity anyway.. :)

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11-09-2013 18:55:58

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 Re: No spark in reply to soundguy, 11-09-2013 12:56:57  
Ok, it was converted to 12 volt negative ground. Everything I read shows I"m setup like it should be. Plus on the coil going to the dist and the negative going to the key switch. I've checked and the coil shows good. I ordered a distributor cap as of right now that looks like it's causing the problem. I tried the old rotor and the new rotor nothing changes from one to the other. I'll find out Monday afternoon. Looks like I'm good to the dist but not going to the plugs.
This post was edited by dyoungen at 19:04:35 11/09/13.

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11-11-2013 05:33:22

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 Re: No spark in reply to dyoungen, 11-09-2013 18:55:58  
actually.. you either did not read what I posted... or did not understand it.. at all... in either case.

if you are negative ground. - on coil to dizzy.

though it will run either way.

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11-11-2013 09:23:56

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 Re: No spark in reply to soundguy, 11-11-2013 05:33:22  
I'm sorry I didn't post a reply to your answer about how to hook up the coil. I changed the hook up of the coil and there wasn't any change. I had the + plus hooked up to the dist to begin with and hooked up the negative like you said to the dist like you said to do. Both ways got me no spark or at the best a very weak spark with a charged battery. Sorry if you took offense, I wasn't trying to offend you.

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11-19-2013 08:17:31

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 Re: No spark in reply to dyoungen, 11-11-2013 09:23:56  
Ok, I got the tune up kit from the Ford dealer, changed everything except the points and I have spark at the plugs and everywhere else. I got zapped really good when I held the plug and wire against the block to check for spark. She started and after setting the carb to 1 turn out for the small side screw and 1 1/2 turns out for the big screw in the front I got her to idle. Idled for 10 plus minuets and tried to run it up but it choked and would die. I adjusted the small screw and it didn't make any differance. I turned it in till it bottomed out without any differance. I could adjust the big screw to get the idle up or down but she still chokes down when I give it the gas. Any ideas?

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