Poulan Pro 18" 42CC 2 Cycle Gas Chainsaw | PP4218A-ARC (Certified Refurbished) The Poulan Pro PP4218A 18 Inch Gas Chainsaw offers power, reliability, and endurance 2 cycle gas powered chainsaw Engine type: 42cc 2 cycle gas powered engine Gas mixture: 40:1 gas/oil ratio Guide Bar: 18 inches