I have a Ariens snowblower, about 3 years old. It has a LCT engine on it part no. PW6HK17750. My problem is very weak spark. I replaced the coil with 2 different new coils. Still the same weak spark. Things I have done is, unplugged the kill wire, check the flywheel key, made sure no rust on flywheel, new spark plug, gaped the coil, checked the coils with ohms meter. I have been working on small engines for over 20 years, cars for over 45 years. This thing is stumping me. Any one has any idea what I missing?