Running small 4strokes inverted?
 

Just wondering how a small 4stroke such as an OS 26FS or a Satio 30 would run inverted?

Running small 4strokes inverted?
 

Hallo!
No problem at all....ran one of my OS .26 FS to day!
I´m going to use my engines (two OS .26) in a Marutaka DC-3.
I use15% Motul "Micro" all syntetic oil and 5% nitro ( mix my own fuel). RPM was 10.000 rpm using a 10x5 Master airscrew antic prop.
Bu it´s a little bit akward to get to the glowplug when the engine is inverted...so why do you want to mount your engine that way........Its allways better to mount the engine uppward or tillted 90 degrees side or ...canted somewhat from a fully inverted position...!

Regards!
Jan K
Sweden

Inverted
 

My Saito .30 runs inverted in a 20 sized Cub. Fox Miracle plug.

Running small 4strokes inverted?
 

I've had a 70 surpass in a stampe inverted for 6+ years no problem....just let warm up good with glow heat and dont back the needle offpeak but about 1 click. It will run fine ...........Oh ya
don't bother with anything but an OS-F plug.IMO
Riley