Briggs & Stratton 791766 Fuel Line Replacement for Models 691050, 394302, 798512 and 809499, Black

What It Is

This is a genuine OEM replacement fuel line for Briggs & Stratton engines that use one of four specific carburetor part numbers: 691050, 394302, 798512, or 809499. It’s designed to replace a cracked, brittle, or leaking fuel line in walk-behind mowers, riding mowers, and other small engines with those carburetors.

Fitment & Compatibility

Before buying, confirm your carburetor’s model number—not your engine or deck size. The 791766 fits only carburetors listed as 691050, 394302, 798512, or 809499. It’s a 1/4-inch inner diameter (ID) line, about 12 inches long, pre-formed with a 90-degree bend on one end. Check that your existing line has the same bend and length (measure from carburetor to fuel tank). This is an OEM part, so it matches original equipment exactly. It will not fit carburetors outside those four numbers—measure first or look up your engine’s carburetor model.

Key Things to Know

• Quality: Genuine Briggs & Stratton—resists ethanol and heat better than generic bulk hose. Expect a snug fit.
• Installation difficulty: Easy (5-10 minutes). Requires only a small flathead screwdriver to loosen clamps and needle-nose pliers to pull the old line off. No special tools.
• Common gotcha: The line is pre-cut and pre-bent. Do not try to cut or straighten it—you’ll lose the 90-degree angle that prevents kinking. If your routing is different, this part won’t work.
• Check clamps: Reuse original spring clamps if they’re in good shape; replace if rusted or deformed. The line itself doesn’t come with clamps.

Should You Buy It

Yes, if your carburetor matches one of the four numbers and your current line is hard, cracked, or leaking. At $9.99 for an OEM part, it’s a no-brainer over generic bulk hose that may not seal or resist fuel degradation. If your carburetor isn’t on the list, measure your line’s ID and length, then buy a universal 1/4-inch ID replacement instead.