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Tractor Talk Discussion Forum

Hard starting 8n

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Scott

01-23-2004 18:17:58




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I have an 8N ford with a new 12vt conversion charging system. When I try and start the tractor I always have to use jumper cables and sometimes either.Battery is at full charge of the charger but still same problem. It does this hot or cold. ANY HELP!




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jim

01-24-2004 09:11:53




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 Re: Hard starting 8n in reply to Scott, 01-23-2004 18:17:58  
You are very vaque about what it causing it to be hard starting, If it has to turn over a long time and load with fuel, check you compresion, my 9N ran great a year ago, did not use much this year, got really hard starting, took off head. Pistons wer so loose in the cylinder, no wonder it did not run, new pistons and rings later, compression is bakc up to where it belongs, and runs and starts. Just my .02 worth.

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Phil S.

01-23-2004 22:45:53




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 Re: Hard starting 8n in reply to Scott, 01-23-2004 18:17:58  
Is this a "slow cranking" problem?? I mean, if you have a full battery and you still have to jump it to get it going.. Then it is very possible that your 6v starter has given up the ghost internally. It has probably gotten hot and been cooked.. so now it spins over slowly due to high internal resistance and wipes out your battery quicker. (if this is your problem) Could also be what everyone else suggested. Since I am not standing there looking at your machine. When I read you post, it sounds more to me like your starter is dragging.

Anyway, if slow cranking is the problem. The brushes/armature could be shot. I am assuming that you have the original 6 volt starter still in place? Most people when they convert do not change it. Most 6 volts will last until they get overheated. If you have been cranking and cranking on it to the point you wear the battery down. It has probably gotten hot.

If what you have is a slow cranking problem, then take the starter and have it rebuilt. Let them know you need it converted to 12 volts. Most places that rebuild starters can do that. I also suggest that you replace any of the battery cables and terminal ends if they are old and questionable. Make sure you have a good ground.

I would also give tractor a tune up as everyone else has suggested. Start with new properly gapped plugs, new wires, dist. cap and rotor along with points set at the proper gap. Might put in a new coil. They are not that expensive. You said your carb is new.. so that should be ruled out.

Anyway, let us know.. best of luck.

Phil

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old

01-23-2004 19:45:07




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 Re: Hard starting 8n in reply to Scott, 01-23-2004 18:17:58  
Sounds like you need to tune it up, new pionts, plugs rotor and cap and even maybe a carb rebuild. I have an 8N 12 volt that starts every time hot or cold but it is well maintaned, sort of that is been years since it was tuned but it only gets about 50 hours a year of work



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bob

01-23-2004 21:26:30




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 Re: Re: Hard starting 8n in reply to old, 01-23-2004 19:45:07  
sounds more like a fuel problem to me. Try starting it with the intake hose from the breather taken off. Sometimes they won't start with the hose on. I dont know why.



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geok

01-23-2004 19:44:22




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 Re: Hard starting 8n in reply to Scott, 01-23-2004 18:17:58  
One common problem is the spring that keeps the trap door close on the choke butterfly has broken and fallen off. Remove air tube and look in the back of the carb and see if trap door is open. Last hard starting 8N that came in my shop had this problem along with a voltage reducer that cut the voltage so low that the coil couldn't fire properly.



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Scott

01-23-2004 19:56:05




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 Re: Re: Hard starting 8n in reply to geok, 01-23-2004 19:44:22  
THe carb is new also not rebuilt. I will check the tune up part and the voltage reducer



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Ray,IN

01-23-2004 18:46:39




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 Re: Hard starting 8n in reply to Scott, 01-23-2004 18:17:58  
Have you gone through the entire electirical system and made sure everything is according to the owners manual? The 6V system will start the tractor reliably if properly maintained. The 12V conversion is just a coverup for a poorly maintained 6V system, and when the problem area gets bad enough the 12V conversion can't overcome it either.



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