Now I dont have a firestorm and would normally say follow the instruction. But thats kinda the old school method for breaking in the engine, the heat cycle method is now the prefered method of break in.


Now since your in a cooler place you might have to richen your engine up a little so that your not close to your fine tune right off the bat. Not exactly sure how cold it is up there but I know down here it's only about 50f so it's got to be much cooler up there. So maybe a half turn to a full turn counter clockcwise from factory settings would be good to start off with, since it's so cold right now up there. You want the engine to be rich but not so rich that it's a blubering mess or that it's 4 stroking.


Basically take the engine start it up, run it 2 or 3 mins, just slowly driving it around every once in a while going full throttle for a second or two but no more, Make sure the engine gets up to at least 220f then shut it down put the piston at BDC. Let it cool down 5 or 10 mins then do it again. After the 3rd time of doing this you, you can lean both needles out a little 1/4th of a turn, but then increase your run times to 3 or 4 mins while doing full throttle runs now for about 3 or 4 seconds, you can now drive your vehicle faster then before. Once you get 2 or 3 runs of that done. Then lean it out again 1/8th nd do 4 to 5 min runs. After about 2 of them then fine tune your engine and go have fun. I usually go about 20 to 25 mins worth of run time before fine tuning the engine and starting to really have fun with it.

This is the newer method of breaking in an engine and I have had great sucess with this method. Some of my engine's have had over 10 gallons through them and still have a lot of life left. Another 2 or 3 gallons left to them. Cant complain when you have engine that canm get 12 plus gallons out of them while using this method. But if you do use this method it may void your warranty. Just warning you, but I like this method over watching the engine sit there and idle and slowly watching the engine prematurely kill itself.