whats the best glow plug for a os-61fx? im running a os no. 8. is that a good plug or do i need a better one ive been having a problem with it dieing, do you use a different plug in the summer than you do in the winter? it all started when it was cold out.

OS- #8 is what I would recommend....

You normally do not have to change the glow plug especially if you are running a #8.

But in the winter, needle valve adjustment becomes more critical in cold weather. It seems that the colder air is more dense and makes your mixture too lean. So you have to richen it up a little more.

Your model will typically quit on you after it goes around the pattern once?

If you are using a "cold" like a Fireball cold. You may have a hard time getting your engine to run in cold weather. Enventhough it may have ran just fine on one of those 95 degree days.

Enjoy,

Jim

If #8 plug burned down, OS type A5 that one is colder than it is advanced. But, there won't be a problem in the use that it is general with OS#8 and Enya#3. It is a little worried about whether to squeeze a needle valve too much.
kobayan

The only exception would be the aforementioned Enya #3 plug. Outside of those, unless you are using fuel with nitro percentages above 15%, there are NO better plugs for a 2 cycle glow engine IMO.

Maybe something else is not in order...