Pre-Mix for a 4-Stroke ?

[oldfrt613]

I just bought a new chain saw from Stihl. It has a new engine design called a "4Mix". It is a 4 stroke engine designed to run on pre-mix, thus eliminating the need for an oil bath, pump and associated hardware. Sounds to me like a good idea: saves weight, always have fresh oil for the engine and lower maintenance. Anyone have any thoughts, I know we're always wanting to save weight !

 

[Vic]

Very interesting.

Here's more.

http://www.stihl.ca/4mix/english/stihl4mix/default.htm

 

[Yamadad]

Very interesting concept.

 

[Flummo]

If i'm not mistaking, this system has been used for years on engines for RC airplanes. http://www.julton.net/YS53Tek.htm

 

[oldfrt613]

I didn't think RC planes had cam and valves.

 

[GhostRider32]

I didn't think RC planes had cam and valves.

Yes, the 4 stroke versions of the model airplane engines do have valves and cams. I own both 2 and 4 stroke airplane engines and the both use the same fuel which contains oil.