593599 Carburetor for Briggs stratton 591137 593380 591597 Mower Washer Parts for Troy Bilt 2700-3000PSI Pressure Washer 7.75 Hp 8.5HP 8.75HP 850 ex 875EX 875EXi 175cc 190cc Engine

What It Is

This is an aftermarket carburetor (part #593599) designed to replace OEM Briggs & Stratton units (591137, 593380, 591597) on pressure washer engines, not lawn mowers. It fits Troy-Bilt pressure washers and compatible engines from 175cc to 190cc, including 7.75 HP, 8.5 HP, and 8.75 HP models like the 850EX, 875EX, and 875EXi.

Fitment & Compatibility

• Not for lawn mowers: Despite the listing title, this carburetor is for pressure washer engines. Verify your machine is a Troy-Bilt or similar pressure washer with a Briggs & Stratton engine.
• Engine specs: Fits 175cc, 190cc, and 7.75–8.75 HP engines. Check your engine’s model number (e.g., 850EX, 875EX) on the engine shroud or label.
• OEM cross-reference: Replaces Briggs & Stratton 591137, 593380, 591597, and 593599. Confirm your old part number matches.
• Measurements: No deck size to check—this is engine-specific. Measure mounting bolt spacing (typically 2.5–3 inches center-to-center) and fuel inlet size (common 1/4-inch barb).
• Aftermarket note: This is not an OEM Briggs & Stratton part. It may require minor adjustments (e.g., needle valve setting) for optimal performance.

Key Things to Know

• Quality varies: At $21.99, it’s a budget option. Some users report needing to clean out debris or adjust the float height before installation.
• Installation difficulty: Moderate. You’ll need basic tools (screwdrivers, socket set) and may need to replace gaskets (not always included). Expect 30–60 minutes if you’re handy.
• Common gotcha: The carburetor may not come with a fuel shut-off or primer bulb—check your old unit and reuse if possible. Also, ensure the throttle linkage matches your engine’s setup.
• Return policy: Since it’s aftermarket, test fitment immediately. Some sellers have strict return windows if the part doesn’t match your engine.

Should You Buy It

Buy this if you have a Troy-Bilt pressure washer with a compatible Briggs & Stratton engine (175–190cc) and need a low-cost replacement for a clogged or non-functioning carburetor. It’s a good value for DIY repairs, but expect potential tweaks. Skip it if you want guaranteed OEM fit or have a different brand/model—cross-reference your engine number first.