Jonsered 820 Specs

Engine, Cylinders, Pistons and Weight

• The engine has a displacement of 80.7 cubic cm, or 4.9 cubic inches. It has an aluminum with chrome plated single-cylinder bore with a diameter of 2.047 inches. The piston-ported intake method features a stroke of 1.496 inches. The 820 weighs 19.25 lbs. and has a 16-inch bar and chain.

Operating System, Starter Type, Carburetor and Repair Kits

• This chain saw was made to be operated by one person and has an anti-vibration handlebar system. It features an automatic rewind starter with an automatic, gear driven oil pump and an RPM of 9,000. The Jonsered 820 has a Tillotson HS-219B series carburetor and features a centrifugal clutch. It has a major repair kit of RK-23HS and a minor repair kit of DG-5HS/T. The 820 also features an inertia-activated chain brake.

Spark Plugs, Fuel Specs and Miscellaneous

• It uses Bosch WS7F and Champion RCJ7Y spark plugs with 0.02-inch gaps. The 820 uses regular fuel with a fuel-to-oil ratio of 40:1 and a capacity of 33.1 oz. The longest guide bar provided is 29 inches and the shortest guide bar provided is 16 inches. It has a 3/8-pitch chain type. The flywheel/coil air gap is 0.012 inches.