rossow (mn)
Member
I have a McCulloch Pro Mac 605 20-inch chainsaw that has been starting and performing well with recent heavy use until a few days ago. Now it has lost its spark. I have (1) replaced plug, (2) blown and wiped all dust and debris from around coil, (3) set correct gap, (4) disconnected kill-switch wire at the coil terminal, (5) examined plug wire and it looks clean, (6) tested for spark by removing and grounding plug, hooking up a B&S spark tester, even holding onto the plug as I cranked the engine (Yikes!) -- result is no hint of a spark. I don't know how to test a small-engine ignition coil other than what I've already tried, but before I conclude I have a bad coil, I'm soliciting your opinions --would you guess probably the coil or maybe something else I've overlooked? With a new coil running around $65, I hate to make a mistake. I know that cost is high for an old McCulloch, but it's a great saw when it is working (one of the few McCullochs that get generally good comments from users). All advice is appreciated. (FWIW, I don't want or need to buy a new saw; I already have two other 20-inch saws and half a dozen smaller ones. I'd just like to fix the Pro Mac rather than throw it away.)