Bonjour Tony,
My plug gap about 1 mm, I will shorten it again. Do you think it has an impact on the speed of the engine ? Can you change the speed of your engine ? Is it faster than mine ? Do uou change the setting of the needle valve when your engine becomes warmer ?
Bonjour Raphael,
Don't repeat bending the outer spark plug electrode Raphael - it might fatigue and break off. It is very small and you might have to wait a long time for a new one to come from China. You obviously have a good enough spark because the engine runs well now.
On engine speed - I have experimented with removing one of the governor springs on my M90 engine. I could slow it down quite well by doing that, but eventually, the engine stopped on the compression stroke when the energy in the flywheel was too small to compress the fuel air mixture. There are other threads about reducing the compression ratio. Redryder has done this. I do not have the machinery or the skill to attempt that kind of work.
Your governor system is different on the M92 model. There are threads here about shortening the flyball governor spring on the M92. I can not advise you, but it is obvious that you could shorten the spring too much and then not have a spring that was usable any longer.
This video is shows my engine running about as slowly as I could make it run. Any slower and it would stop.
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