Reply To: Lauson T651 Ignition Timing

[Dale]

frankr wrote:

I hesitated to say this, but back in the day, we just went by a rule of thumb that the points should break 1/8″ BTC.  Fanciest tool was eyeball, or perhaps a ruler.

Frank your 1/8″ would be darn good place to start.   We used to set most snowmobile engines at 20 thousands.   Most of those engines had centrifugal advance that went to full advance once the motor started .120  (1/8″)!   Now a days all timing is set at maximum and it can’t be changed.   Plenty of racers that run the K series Mercury motors push the timing full advance and wire it down.   I used to run my points a little wide (wide points advance timing),  backing plate all the way and sometimes I got a nice hole in the top of the piston!  BUGGER!   Leaded gas at 100 octane helped that problem!

dale

Tomahawk on Wednesday!