498260 Carburetor Overhaul Kit and Float Bowl for Brigg and Stratton 498260 498261 796611 493762 492495 493640 490937 398183 for 20-141-1 20-141 Carb Fit for 3.5 4HP Max Series Engine

What It Is

This is an aftermarket carburetor overhaul kit and float bowl assembly for Briggs & Stratton 3.5HP and 4HP Max Series engines (also known as the 20-141-1 and 20-141 carburetors). It replaces the factory parts needed to rebuild the carburetor—gaskets, seals, float, needle, and bowl—on walk-behind mowers, pressure washers, and small generators using those engines.

Fitment & Compatibility

Before buying, confirm your engine’s exact model number (found on the valve cover or blower housing). This kit fits Briggs & Stratton Max Series engines with carburetor part numbers 498260, 498261, 796611, 493762, 492495, 493640, 490937, and 398183. It is not a universal fit—it only works on the specific 20-141-1/20-141 carb body used on 3.5–4HP engines. Check your carburetor’s mounting flange shape and bowl size (roughly 2.5 inches diameter) to match. This is a non-OEM aftermarket kit, so gasket thickness and float level may differ slightly from OEM.

Key Things to Know

• Quality is acceptable for the price but expect thinner gaskets and a less precise float than OEM. Some users report needing to adjust the float height (bend the tab) to avoid flooding.
• Installation difficulty is moderate—requires removing the carb, cleaning all passages with carb cleaner, and carefully reassembling. A tiny spring or needle can easily be lost.
• Common gotcha: The bowl gasket may not seal perfectly if the old bowl is warped. Check the bowl mating surface for flatness before installing.
• Not a complete carburetor—this is a rebuild kit only. If your carb body is cracked or the throttle shaft is worn, this won’t fix it.

Should You Buy It

Buy this if you have a 3.5–4HP Briggs Max Series engine with a gummed-up or leaking carburetor and you’re comfortable doing a basic rebuild yourself. It’s a cheap fix for a common problem, but if you want a guaranteed perfect seal or have a heavily corroded carb, spend more on an OEM kit or a complete replacement carburetor.