RE: Picking glowplug for AP .15 - help!
Hi scubyfan,
An OS A3 will be perfect. It is a relatively short plug, and is also slightly hotter. I run this and 15% nitro is my OS 15LA with absoultly no problems. The smaller engines tend to like nitro more that larger engines and they run quite a bit better. 10-15% is about right.
Stefan