I consider myself a beginner, or novice today as I used to fly years ago, but have been away from the hobby for several years.
I fly 40 size planes with 2stroke nitro engines.
I have had more issues with my glow plugs than ever before. So, I need to order some new glow plugs.
I used to buy standard long glow plugs with an idle bar.
Today I see #3, #4, #6...etc. etc.. I do not know what these designations stand for.
Can someone please explain how to choose the correct glow plugs for my aircraft engines, and what is the difference between #3, #4, etc.?
Thank You