Small Engines (Lawn Mowers, etc.): B&S 3HP Electrical problem?, briggs stratton, starter clutch


Question
Marc,

Thanks for your prompt reply.

I do not see a spark arcing when I remove the plug wire.

Is it possible to upgrade the ignition to a modern system?  I've got to weigh the cost of points and condensors as well as possibly buying a new coil against upgrading the ignition.  I have the mechanical ability to make the repairs myself.

Thanks,

Kenny

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Followup To
Question -
I just purchased a Little Wonder edger (circa 1975) with the original 3hp B&S motor from an elderly gentleman who had bought it new.  It started on the first pull and hummed like a Mercedes, so I gave him $50 and took it home.

The next day, I started it again.  It ran for about 2 minutes, screeched loudly and died.  I determined the screeching was from the starter clutch and replaced it with a new one.  However, it still will not start.

I have turned the crank with a 22mm socket on an electric drill and am getting no ignition.  I am wondering if it is not getting a spark.  How do I trouble-shoot this particular problem?  It seems to use a magneto-coil to generate the spark.

Thanks very much.  I look forward to your response.

Kenny
Answer -
If it is a 1975 model, it will have a points ignition.  It would be wise to change the points and condensor and have the coil tested at a shop.  Replacing points and condensor is almost a regular maintenance routine.  If everything is working correctly, the spark should be able to jump a 1/8" gap to ground.  Hope this helps.

Answer
Briggs & Stratton used to sell a retrofit electronic ignition pickup that snaps on to the coil and eliminates the need for the points.  This kit included a block-off plug for the points plunger as well.  I just checked the Briggs & Stratton website and the still sell it.  It's called a Magnetron Ignition Kit - 5025.  Copy and paste the following link in brackets into your address bar (http://shop.briggsandstratton.com/BShopProductPage.asp?CatalogID=56B2B9A0-283C-1)  Hope this helps.