Originally Posted by
Hobbsy
Speaking of ignition timing, I checked the timing on my Saito FG 11, Saito says it's set at a medium setting. If my equipment doesn't lie it is set at 35 degrees BTDC. It reads the same whether using the stock ignition module or a C&H Ignition Synchro-Spark module That's not exactly medium.
36 degrees BTDC is often considered optimum spark advance for water cooled 4-stroke gasoline engines. Air cooled gasoline engines usually fare better with around 28 degrees due to higher CHTs that promote detonation..
Have you tried reducing the advance to see if it changes any running characteristics?