[AT] B&S coil

[Doug Tallman]

john, if its a battery operated coil, you measure between the ppositive 
and negative posts for the primary. You measure from the coil lead 
(center) to housing (eng ground) for the secondary. On the Briggs coil, 
you measure between the points wire and ground for the primary and the 
spark plug lead to ground for the secondary. Doug T




John Dunlap wrote:
> just a question ? & I should know this, however, when measuring primary side from center post to what, certainly not the exterior housing ???
> to + side if -  ground and vice versa for secondary ???
>
> >From John's iPhone
>
> On Jul 1, 2012, at 4:05 PM, k7jdj at aol.com wrote:
>
> I just measured a new Brigs coil #496914 at 1.5 ohms primary and about 5,000 secondary 
>
> Gary 
> Renton, WA
>
>
>
> -----Original Message-----
> From: Doug Tallman <dtallman at accnorwalk.com>
> To: Antique tractor email discussion group <at at lists.antique-tractor.com>
> Sent: Sun, Jul 1, 2012 11:08 am
> Subject: Re: [AT] B&S coil
>
>
> 5000 ohms is about right for the secondary side. The primary side should 
> be about 1 to 1.5 ohms. Doug T
>
>
>
>
>
> Recentjester at aol.com wrote:
>   
>> sometimes heating a coil up will drive the moisture out low oven setting or 
>> solar oven.  All lawnboy coils have this problem sooner or later
>>
>>
>> In a message dated 7/1/2012 12:17:59 P.M. Central Daylight Time,  
>> charliehill at embarqmail.com writes:
>>
>> Dean I  just read online that it's between 2500 and 5000 ohms for a BS  
>> Coil.
>> http://www.briggsandstratton.com/support/frequently-asked-questions/Ignition
>> %20System%20Theory%20and%20Testing/
>> The  article was talking about the later version of B&S ignition but those  
>> numbers sound about right based on what I read
>> while testing my tractor  coil a few weeks ago.
>>
>> Charlie
>> -----Original Message----- 
>> From:  Dean VP
>> Sent: Sunday, July 01, 2012 12:16 PM
>> To: 'Antique tractor email  discussion group'
>> Subject: Re: [AT] B&S coil
>>
>> Don,
>>
>> It  takes a pretty good ohm meter to measure the resistance of a coil.  It  
>> might be
>> somewhere from less than 1 ohm to 2 or three ohms. Inexpensive  ohm meters 
>> do 
>> not measure
>> low resistance very well or very  accurately.  Also it is important to zero 
>> the meter first
>> before  measuring by shorting the leads on the lowest ohm measuring scale.
>>
>> Dean  VP
>> Snohomish, WA
>>
>> "Do not go where the path may lead; go instead  where there is no path and 
>> leave a trail."
>> - Ralph Waldo  Emerson
>>
>>
>> -----Original Message-----
>> From:  at-bounces at lists.antique-tractor.com  
>> [mailto:at-bounces at lists.antique-tractor.com]
>> On Behalf Of Don  Bowen
>> Sent: Sunday, July 01, 2012 8:57 AM
>> To: Antique tractor email  discussion group
>> Subject: [AT] B&S coil
>>
>> I have a mid 70s 10 hp  B&S I am trying to start.  There is no spark so I 
>> cleaned  the
>> points but no joy.  I am measuring a short to ground through the  coil.  I 
>> do 
>> not totally
>> trust the meter so what should the  resistance through the coil be?
>>
>>
>>     
>
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