My betterer methods
1. attach hose to machine, turn water on, start engine, jam wand of pressure washer into either end of exhaust pipe, grab ahold of the handle and click it on...enjoy!! its fun for the kids too, acts like a water sprinkler.
2. Advance your timing 50% so that the fire explodes inside your exhaust and ignites all the carbon and crap and blows it right out the exhaust.
3. If your too lazy to advance your timing, freeze your entire pipe using liquid propane and then light it. Watch the dirt just burrrnn off.