Yeah, I answered that in the other thread Captain. But I just had another thought....

If that engine was new or rebuilt, it might have "eaten" the glow plug. I have found that when running a new or rebuilt engine on Gas/Glow, that it will usually ruin a glow plug while the engine starts breaking in during the first few tanks of fuel. The tiny metallic particles shed during the initial break in contaminate the plug. I usually use an old, crappy glow plug for break in for that reason. After a few tanks of fuel, you can put a good glow plug in, and then they last a really long time.

AV8TOR