Ariens 1640H Mower, Lawn and Garden Tractor

Briggs 16hp 28Q777-0645

If you have an electric clutch you will have to use the alternator and regulator off of your old engine if you purchase an engine with less than 9 amps. The newer AVS Briggs engine are about 2" wider than the original engine. If you have a fuel pump mounted to your engine and you purchase the AVS engine that has no fuel pump, you will also have to use it off of your old engine and install a new dipstick tube 697085 and vacuum hoses.