HOW TO REPLACE the Spark Plug Yard Machines Single Stage Snowblower. Accessories for the MTD 31AE150-062. View and Download MTD SNOW BLOWERS user manual online. Narrow your search down by symptom and read the amazing step by step instructions and troubleshooting tips for 31AE150-062 / from do-it-yourselfers just like you. LTC says the suggested plug is the Torch F6RTC.