Hey Guys, Just wanted to give you my 2 cents on how to keep your machines running in top condition: 1. Marvel Mystery Oil. I could go on and on about this stuff. I use it to get rid of all that trash in the gas tank. I put it in an old 45 chevy pickup that had a frozen engine and about a month later it freed it up. Tore that same engine down and the cylinder walls were cleaner than a mirror. I put it in all my handheld equipment, mowers, and even the truck. I notice a considerable improvement in engine performance after treatment every single time. Best of all, you can put it in the gas tank or the crankcase. And it is pretty cheap too. 2. Keep air filters clean. I usually try to use one filter per machine per year but I keep it clean as I can. I like the oil foam prefilters that you can clean once a month. Those really last a long time. The regular paper filter can be cleaned with compressed air. Don't use water on paper filters. 3. BOSCH spark plugs. I didn't think that a different brand spark plug would do any better until I got a NGK plug to replace the bosch. I couldn't figure out why the blower seemed to lose some power until I replaced the plug with a new bosch. There is a difference. Try for yourself. I don't buy anything else but bosch plugs. 4. Spark arrester screen. This is a big one. The screen is suppose to "arrest" or suppress any spark or flame that exits the muffler. I was working on an old Tanaka trimmer that would not reach high rpm at all. After several calls to Tanaka I discovered that the screen was completely clogged. I pulled it out, cleaned it with a brass brush, put it back in, cranked it up and had new trimmer almost. It really had the power back! So check up on those spark arrester screens These are some good ole tips to help keep those engines running in top condition. Your machines will work better and you will save some money at the gas pump.