The OS#8 glow plug is a colder plug and works great in high RPM high heat conditions like 60 size 2 strokes....possible ducted fans, and other 2 stroke engines....That are fairly small like 90 size and below...

When you start getting to 4 strokes they needs a hot plug that is the OS #F or the YS 4 stroke plug.

This plug also works well in the large 120 and up 2 strokes.


Here is a link to the OS website and talks about the plugs are used for.

http://www.osengines.com/accys/glowplugs.html


Aslo the instructions that came with your engine expressly ask for a glow plug designed for a 4 stroke.....so the YS plug and the OS #F are your best choices.

There are others out there but I have no experience with them. I know these two choices work and are redily available.

Troy Newman
Team YS