[:-]Hey Kid welcome to the XTM world and if you need any help myself or Global Hobby will be more than willing to give a hand. In google search type in xtm dealer and you will find lots of sites to help you. Small block engines should use a cold plug most of the time under normal circumstances. The reason for that is the smaller engine has a harder time cooling off due to the very small metal mass of the engine. Larger blocks stay cooler because of the larger block and head (engine mass) thats the basics though. The colder it gets the more you will need the heat to make the engine fire properly, so where your at right about now its probably pretty cold.......under 50 degrees I would think, The warm plug is what I use under 90 degrees and above 50 ( XTM #4) under 50 degrees I use the hot plug (XTM #3) to keep the temps up and get proper firing. Its all a game of differences in temp and moisture in the air. Those things will change the needs your truck to run properly. So adjustment can be on a run to run bassis as a day goes on. I could start racing on Saturday morning early at say 3 turns out and buy 12 noon get the best preformance at 3 and 1/2 turns out and back as it cools in the evening. Those are just vage examples, but for the most part what it takes to play with an RC nitro car or truck. [:-]

You got one heck of a deal on that purchase and you can keep it going for a lot of years if you so choose to........for that purchase new you would go in well over $300.00

This sport is not cheap by any means and if your not willing to invest time and money you will never be happy with the sport [X(]

Good luck and hope to see you back in the forums here..........give me a pm if you would like to know another good place for information [:-]