Hi Dar,

thanks for your fast answer, I'm using 20% castor oil I don't use nitromethane. About te engine, I bought it in France on March 2002 and I could have a good broke in in this year, after that I didn't use the engine.

The actual length of the silicone tube is 2.5", this is the original that came with the engine, so you mean that I have to change the rubber hose and increase the length to 3.5" and attach it as far as I can? a friend told me somthing similar, but he said that I have to increase the length of the elbow instead of the rubber hose because with the time if you increase the lenght of the rubber hose it will burns, is it true?

Which is the glow plug which fits best to this engine?

When the engine was working well I realized that the transition was not so smooth I mean when I push rapidly the throtle it takes a while to increase the speed about 1 or 2 seconds, but if I push it gently I got a perfect response, can I improve it or it is normal?

Which is the best propeller for this engine, can I use a 10x8, is that better than 11x6?

Thanks indeed again,

Ricardo