The BSA A7-A10 Forum

Technical (topic titles must be descriptive) => Lucas, Ignition, Charging, Electrical => Topic started by: Resto-Rob on 22.06. 2014 19:13

Title: Oil in Magneto
Post by: Resto-Rob on 22.06. 2014 19:13
Hey guys,
Has anyone else had this problem...
I was riding my 53 A10 plunger around today, it was a hot day and the engine got pretty hot so i limited my time on the road.  When i went to re start my bike it wouldnt even cough! There was nothing!  So i spent a bit of time looking up hot starting problems and a common fault is the magneto breaking down.  I tested for spark and it was pretty weak, when i whipped out HT lead pickups they were covered in oil! 
I assume the oil is coming from the timing case??
Too much pressure maybe??
When i crank the engine over by hand i can hear i hissing sound so i guess the breather is doing its job....

Any ideas guys??

Title: Re: Oil in Magneto
Post by: a10gf on 22.06. 2014 19:15
Some info > http://www.a7a10.net/forum/index.php?topic=8453
Title: Re: Oil in Magneto
Post by: Resto-Rob on 22.06. 2014 20:31
Seems like a common problem... looks like i have some work to do.