Briggs and Stratton 1756247YP Washout Port Adapter

What It Is

The Briggs and Stratton 1756247YP Washout Port Adapter is a replacement fitting that connects a garden hose to a mower deck’s washout port, allowing you to rinse grass clippings from under the deck without removing it. It’s designed for Briggs & Stratton engines on walk-behind mowers and zero-turn riders equipped with a factory washout port.

Fitment & Compatibility

Before buying, check your mower’s deck for a pre-installed washout port (a threaded hole on top of the deck, often near the discharge chute). This adapter fits decks with a 3/8-inch NPT (National Pipe Thread) female port—common on many Briggs & Stratton-equipped mowers from 2010 onward. Measure the port diameter: it should be roughly 0.675 inches across the threads. If your mower uses a different thread size (e.g., 1/4-inch NPT or metric), this adapter won’t work. It’s an OEM Briggs part, so aftermarket port adapters from other brands (like MTD or Husqvarna) may have incompatible threads. Confirm your mower model number (found on the deck or frame) against Briggs’ compatibility list if unsure.

Key Things to Know

• Quality: The adapter is made of durable plastic with brass threads—holds up well to regular use, but avoid overtightening to prevent cracking.
• Installation: Tool-free hand tightening is usually sufficient. If it leaks, a single wrap of Teflon tape on the threads can seal it (don’t use pipe dope).
• Common Gotcha: The adapter includes a built-in shut-off valve that stops water flow when the hose is disconnected—if this valve sticks, you may need to disassemble and clean it.
• Water Pressure: Use standard garden hose pressure (40-60 PSI). High-pressure washers can damage the adapter or deck seal.

Should You Buy It

Buy this if your Briggs mower’s washout port is missing, broken, or leaking and you want a direct OEM replacement that installs in seconds. It’s a cheap, easy fix for a common issue—just double-check your port’s thread size first. Skip it if your deck lacks a washout port entirely or uses a non-standard thread.