SF3 boyer ignition doesn't advance

M

macavity99

Full member
Location
Bedfordshire, UK
Just installed an old Boyer Bransden Mk III. It starts and strobes the TDC mark but will not advance the timing when revved!

I've used this ignition before and it worked previously but now it seems to be stuck at 0 deg.

Any ideas?

Cheers, Steve in UK

 
Thanks

The original Todd Boyer instructions call for static setup with timing PM mark aligned at TDC. Boyer Bransden instructions call for static setup at full advance.

Which is correct? I hate the sprag grinding when you first try to start.

Steve  in UK
 
  Haven't got the BB instructions - but re-read mine (see below)  - it doesn't matter where you start from - as long as the full advance is at the right place - regards - Phil

Set the motor at TDC (PM) & align one of the magnet holder screws with the hole that is the one for the correct rotational direction. The timing will be approximately set by this procedure, but if the engine does not want to start, loosen the clamping screws & turn the stator plate a few millimetres either way. The machine should then be strobed with the motor spinning in excess of 5000rpm. Try the timing a few degrees retarded from original settings - this seems preferable on most models.
 
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