Ariens 1640H Mower, Lawn and Garden Tractor Category
Original Model: 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.
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While we may have sold many engines listed above to be used for a Ariens 1640H Mower, Lawn and Garden Tractor Category, we are NOT claiming these are exact replacements unless the product notes explicitly say so. Many original equipment engines may no longer be in production because of obsolescence or EPA regulations, so in some cases there may not be an exact replacement available. Our intention here is to show that other customers have utilized these in the equipment shown, but may have had to make some modifications to do so. If we know of any required changes, we will list those, however, some adapting during installation should be expected.