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HELP - cannot get enough spark !


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#1 MGP59DB OFFLINE  

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Posted March 30, 2016 - 04:09 PM

Model 143402 - B&S 502727 - SN111659

026.JPG

 

This damn motor is starting to tick me off... :wallbanging:

 

I put in the new coil pieces today . So good coil , ...? 

 

Tried two new condensers .

Points are good . because there is some juice flowing thru the system , enough to bite you pretty good.

But there is not enough juice to jump the spark plug gap ?

I hooked this motor to an electric motor to spin it pretty fast and can see sparks from the wire to the head .

 

Does anyone have any idea's on what to do next?

Only thing left is the magnets on the flywheel ... the rest is new  , wires and all.

 

 

 

 


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#2 Bolens 1000 ONLINE  

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Posted March 30, 2016 - 04:13 PM

One sure fire test is using an inline spark tester to see if you actually are getting spark under compression when the plug is in

 

Also are you using Genuine B&S parts ?


Edited by Bolens 1000, March 30, 2016 - 04:19 PM.

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#3 MGP59DB OFFLINE  

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Posted March 30, 2016 - 04:26 PM

One sure fire test is using an inline spark tester to see if you actually are getting spark under compression when the plug is in

 

Also are you using Genuine B&S parts ?

It just seems irrelevant , if I am  not getting a spark to jump the gap while the motor is turning at a good clip with the plug grounded to the head , I am pretty sure it isn't with the plug in.

This is the third one of these I have worked on this year . When everything is working good you get a lightning storm with the plug , no doubt about spark.

This is just not getting much of any.


Edited by MGP59DB, March 30, 2016 - 04:27 PM.

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#4 Bolens 1000 ONLINE  

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Posted March 30, 2016 - 04:33 PM

Sorry misread the first post about the spark.

 

Are you sure nothing is grounding out , did you replace the fiber plunger that raises the points ?


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#5 Titus ONLINE  

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Posted March 30, 2016 - 04:36 PM

I'm sorry if you've said this already, but is the cable itself good from the mag? The plunger I'd check to make sure it's the proper length, proper gap on SP, correct SP installed, and that you have a good ground/all wires/ cables are in tact.


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#6 Eric OFFLINE  

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Posted March 30, 2016 - 04:47 PM

Just because something is new does not mean it is functional or good, I have had many new coils and plugs be found to not function. Also have found that I had the wrong type of wire for the coil I was using you know non resistor or internal resistor coil. Just my two cents good luck.
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#7 MGP59DB OFFLINE  

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Posted March 30, 2016 - 04:48 PM

Sorry misread the first post about the spark.

 

Are you sure nothing is grounding out , did you replace the fiber plunger that raises the points ?

Did not replace the plunger - but it appears in good condition and the gap in the points is set right . A ground some where crossed my mind - but everything appears good.

 

I'm sorry if you've said this already, but is the cable itself good from the mag? The plunger I'd check to make sure it's the proper length, proper gap on SP, correct SP installed, and that you have a good ground/all wires/ cables are in tact.

http://www.ebay.com/...=STRK:MEBIDX:IT

 

Put this mag on today , all wires were checked . I mean we went thru this thing 4 times - checked and rechecked.


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#8 MGP59DB OFFLINE  

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Posted March 30, 2016 - 04:52 PM

Just because something is new does not mean it is functional or good, I have had many new coils and plugs be found to not function. Also have found that I had the wrong type of wire for the coil I was using you know non resistor or internal resistor coil. Just my two cents good luck.

I realize this . Have had bad condensers that were new - but three in row seems unlikely .

The system is functioning but weak.

I haven't tried to start it - no point to it without spark .

 

post-66960-0-63428800-14421509151.jpg

We did this one - same motor type - just replaced the condenser and rewired . works great !

 

This one is being stubborn - I just need some ideas as to where to look for issues.

I could grab the guts from this one and see...

 

 

 


Edited by MGP59DB, March 30, 2016 - 05:03 PM.

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#9 stiemmy ONLINE  

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Posted March 30, 2016 - 05:31 PM

Just my .02 cents worth here, I would take that coil down to your local shop, and match it up with a used electronic unit. The cost for an electronic coil is the same as tune up parts would be , and you never have to pull the flywheel off ever again.

I have a thread in the Panzer section with a briggs I did this conversion to. If you do go this route, use an index card between the magnets, and coil before snugging the coil. This will give you about .010 gap in between, and works EVERY time. Cheers!

Edited by stiemmy, March 30, 2016 - 05:37 PM.

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#10 chieffan ONLINE  

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Posted March 30, 2016 - 06:07 PM

I know exactly how your feel.  I went through the same thing with a S14D Wisconsin.  $200+ worth of " new" B&S parts later and no spark to the plug.  Solved the problem by jerking the engine out, shipped the head to Indiana and the rest of the tractor was sold as scrap.  Sure cured me on those S series Wisconsin.



#11 MGP59DB OFFLINE  

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Posted March 30, 2016 - 06:19 PM

Ya I was just researching the electronic coil set-up and it might be the best way to go at this point . I just need to find the right one for this motor .

The whole machine is in such good condition that this must have been an ongoing problem . I am going to figure it out , I sure hate to waste money on Chit that don't work. I am going to solve this. One way or the other.


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#12 Lauber1 OFFLINE  

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Posted March 30, 2016 - 06:43 PM

the easiest way to make one of these work is to get a magnetron coil and flywheel from a IC briggs engine of 8hp. it will fit right on. I do this all the time with my Suburbans, which use the same engine.


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#13 Bolens 1000 ONLINE  

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Posted March 30, 2016 - 06:47 PM

Its got to be something simple

Did you use Genuine B&S parts?


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#14 propane1 ONLINE  

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Posted March 30, 2016 - 07:01 PM

Bad ground on the condenser ?

Noel

#15 MGP59DB OFFLINE  

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Posted March 30, 2016 - 07:38 PM

the easiest way to make one of these work is to get a magnetron coil and flywheel from a IC briggs engine of 8hp. it will fit right on. I do this all the time with my Suburbans, which use the same engine.

You say I need the flywheel too?


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