Stihl BR 430 Leaf Blower Backpack Tube Throttle 63.3cc Engine 4244-011-1621STIHL BR 430 Leaf Blower Backpack Tube Throttle 63. 3cc Engine 4244 011 1621 When the job runs long, the STIHL BR 430 is right there with you. It has the features you need to get the job done with fewer refuels and less fatigue. Its pro sized 57. 5 oz. fuel tank goes even farther thanks to a fuel efficient engine that produces cleaner emissions when compared to standard 2 stroke engines. In addition to its anti vibration system and ElastoStart handle,