Why does my Briggs and Stratton Quantum 6.0 engine keep stopping?
I have a B&S Quantum 6.0 motor 125H02-0122-B1 02041B56. Did some research at our local library and believe from the numbers that this engine was manufactured in 2002. It’s fitted to a Grillo HWT 550 line trimmer (strimmer) which I might say is a wonderful machine for taming grass. The problem is that the engine won’t keep going. It starts fine, the same way it always has, but stops after a couple of minutes running. It won’t restart immediately but will do so after just a few minutes, but stops again after another couple of minutes. If you restart it sooner rather than later it seems that it also stops sooner. That’s my impression anyway. I haven’t actually timed it. Sometimes when you restart it quite soon it will give one backfire. Compression is fine when you pull the cord. When it first started doing this the engine cutout quite quickly, but now it sometimes cuts out more slowly, even occasionally recovering some revs but never continues running for long. I’ve tried pressing the pr