My s1r9a9m9 replication!

[michaelpaul]

These are not excellent news but at least is some positive result.

I'm still using capacitor70 diode circuit witch he used on is working model.

Today I manage to idle my engine with 50/50 water and 96ºvol ethilic alcohol.

I'm using alcohol because It mixes with water but the moving parts of the engine tend to get stuck.
The choke gets stuck and a valve got stuck open once too. I guess alcohol does not lubricate and gas does.

The engine only got to start after it was a little bit warm. The heat only came after allot of pulls of that cord.
The head was warm and the plug was too.

Maybe mix a bit of mineral oil in for lubrication. Not sure if it would mix well, just a thought.
Mike

[AhuraMazda]

@rismos,
Is your test engine 2 stroke or 4 stroke?

[rfsimoes]

@rismos,
Is your test engine 2 stroke or 4 stroke?

It's a 4 stoke 127cc 3HP briggs & stratton:
http://www.youtube.com/watch?v=EEs_XF5IWQY

I know that in brasil, alcohol is used allot in cars but don't know what kind of alcohol.

[Super God]

Maybe try an extremely lean mixture of gasoline, it may be all that's required to keep the valves lubricated.

[provelless]

rismos, I doubt that the fuel mixture is related to stuck choke or valves. The choke doesn't require any lube, which valve is sticking, intake or exhaust? The intake valve might get some lube or cooling effect from the fuel while the exhaust valve lives in a brutal atmosphere, dry, extreme heat, yet it survives. I think I would pull the valves out and clean them up along with the ports.