[AT] B&S coil

[John Dunlap]

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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