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? for John T

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Mike

12-12-2000 01:41:19




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Why does pulling the plug wire back on boot, so spark has to jump to the plug, make a hard starting G start much easier? thanks, Mike




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G Taylor

12-12-2000 20:36:14




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 Re: ? for John T in reply to Mike, 12-12-2000 01:41:19  
Alright for emergencies but would rather repair the problem(s) instead of making Micky Mouse methods a regular practice. Solid core wires, non resistor & clean properly gapped plugs and a fresh distributer or mag.



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Mike

12-13-2000 06:12:46




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 Re: Re: ? for John T in reply to G Taylor, 12-12-2000 20:36:14  
I'm sure if I worked the tractor on a regular basis alot of my problems would go away. Seeing as it rarely does any serious work, off the track, it doesn't often get up to working temp. I probably should get the shutters working so I can heat it up better. The 48 G still has em on, someone robbed the ones off the 45.



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Bob

12-12-2000 10:25:25




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 Re: ? for John T in reply to Mike, 12-12-2000 01:41:19  
Mike, Old John T is right as usual, what nobody mentioned so far is that you can grind away a portion of the rotor ( or rotor button) and have a built in added air gap. Now the reason the mfg. didn't do this is as others stated, you lose amperage AND you likely will create radio interference which may make the neighbors mad. But if you keep a spare rotor just for first time hard starting you avoid the chance of the plug wire falling off or biting you. Just my nickels worth (can't get much for $.02) Bob

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Mike

12-12-2000 13:56:20




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 Re: Re: ? for John T in reply to Bob, 12-12-2000 10:25:25  
anyone who hasn't been lit up by a wico mag hasn't really lived life to the fullest. thanks for the input, Mike



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John T

12-12-2000 07:35:00




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 Re: ? for John T in reply to Mike, 12-12-2000 01:41:19  
Mike, its a little complicated and rememember, being an engineer and attorney makes me take a short story and make it LONG so bear with me. When the coils primary stops conducting (points open) the energy stored in the magnetic fields needs to dissipate, and electrical energy is dissipated in volts times amps of current flow. The coils high voltage secondary, wanting to expend its energy via volts times amps, but with no current path [plug gap is an open circuit], starts to ramp up to a high enough voltage to arc jump the plug. HOWEWVER, if the plug is fouled with oil or gas or carbon, that stored energy starts to bleed off via leaking current through the oil etc. and the energy gets expended before the voltage ever ramps up high enough to jump the plug gap and the plug never fires. BUT, when you add that extra external gap so current cant flow in the plugs oil, the coils secondary voltage goes ahead and ramps up high enough (like normal with no oil shorting path) to jump the added air gap, then when it hits the plug, it goes shead and jumps across and fires like normal. Thats why an otherwise fouled plug in an environment of oil and carbon etc can go ahead and fire when you add that extra gap. CLEAR AS MUD HUH????? Its also how a high energy solid state ignition can better fire plugs under tougher conditions, but thats another story. Ol John T

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Mike

12-12-2000 13:53:44




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 Re: Re: ? for John T in reply to John T, 12-12-2000 07:35:00  
Sounds good to me, thanks for the help! Mike



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twopop

12-12-2000 06:00:35




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 Re: ? for John T in reply to Mike, 12-12-2000 01:41:19  
when a gap is caused in the spark circuit the intensity of the spark is increased which makes the spark hotter.when this happens there is usually a weak link in the ign.system or low compression in the cylinder.years ago we used to buy adaptors to put on plugs so that the spark would jump.havent seen any for a long time



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ff316

12-16-2000 16:06:12




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 Re: Re: ? for John T in reply to twopop, 12-12-2000 06:00:35  
Are you talking about non-foulers? They sell them in the HELP section at Advance Auto Parts and other stores, if that's what you mean...



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John T (Hey ML)

12-12-2000 07:48:58




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 Re: Re: ? for John T in reply to twopop, 12-12-2000 06:00:35  
Hey twopop guy I think Champion made the extra added gap plug for oil burners and they had an added U letter designation (I think??) in front of the normal Champion number (Mike Aylward knows). Just remember, the plug firing expends the coils energy and thats volts TIMES amps. So if the gap is way wider, it takes more volts to jump it, but then the arcing current is less amps which may make it more of a skinny yellow spark as compared to a fatter higher current bluer spark across a shorter plug gap. Its like the old line theres no free lunch and when you widen the gap requiring more voltage to jump it, then the arcing current flow is less. If you find those plugs let us all know but I think they are Champions with an added U letter????? John T

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Mike Aylward

12-12-2000 15:45:42




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 Re: Re: Re: ? for John T in reply to John T (Hey ML), 12-12-2000 07:48:58  
Hey John and others. Yes, Champion had these plugs (and may still). They had what is known as a "booster gap". I wouldn't waste my time trying to find them, though, with the normal luck I have had with Champion plugs. Get a good set of Autolite plugs and go out and "pull the guts" out of your tractor, and it will like it. Oh, BTW John, it's "M. M.", not "M. L"....:-) Hope this helps. Mike

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Dogmeat

12-12-2000 04:18:03




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 Re: ? for John T in reply to Mike, 12-12-2000 01:41:19  
Because it likes to be teased!



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