![]() Until you measure it you won't know for sure, though. ![]() Ryobi, though best known these days for their battery-powered tools, does still maintain a few gas model trimmers. cutting width allows you to trim more grass in less time and is equipped with Easy Start technology for simpler pull starts, as well as easy 3-step starting prime, choke, pull. Virtually every model of Craftsman string trimmer that I looked at used 40:1 gas to oil ratios. If it is looking good, you may also want to try and move the spark plug lead around while you are testing to see if the reading changes.įrom your description it appears your magneto is having a ground fault issue. Check out our top picks for the best gas string trimmers of the year to find heavy-duty tools perfect for homeowners with lots of grass to trim. Our 25cc, 2-cycle gas powered straight shaft WEEDWACKER trimmer is lightweight and easy to use. Either way, you'd need to replace the magneto. If you have greater resistance than that (higher than 5k ohms or even infinity), there is too much resistance. If less than that or you have direct connectivity, you most likely have a ground fault where it will not produce a spark (the energy created goes directly to ground). The reading should be between 2.5k to 5k ohms (for a B&S, anyway). Place the negative (black) lead to a ground spot on the magneto body (is usually the laminated metal part which bolts to the engine).Place the positive (red) lead to the metal part inside the spark plug wire lead.Get your ohm meter and set it to 20k ohm setting.BEST COMMERCIAL: Stihl FS 70 R Grass Trimmer. BEST BANG FOR THE BUCK: Ryobi 2-Cycle Straight Shaft String Trimmer. ![]() However, if the fuel is leftover from last year, consider replacing it. Simply fill the tank and try to start the trimmer. If the fuel level is low, the trimmer may fail to start. First and foremost, check whether there’s enough fuel in the tank to power the trimmer. Here are the testing steps for a B&S, but it should allow you to test yours and get an idea if the coil is at issue: RUNNER-UP: Husqvarna 330LK Gas String Trimmer. Your Craftsman 25cc Weedwacker may fail to start due to fuel-related issues. Mix at the ratio of 40:1 (3.2 oz of oil to 1. Do NOT use automotive oil or 2-cycle outboard engine oil. It could be a Briggs and Stratton, but more than likely it's something else. This is a 2-cycle engine and requires pre-mixing gasoline and 2-cycle oil. I don't know what the exact make of the engine is, since Craftsman power tools utilize many different brands and re-brands them. If you have the coil off of the engine, you can do a resistance test on it to see if it's fried. You can test your magneto (can also be called a coil) directly to see if it works. ![]()
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