1. Introduction
This manual provides essential instructions for the proper installation, operation, and maintenance of your Briggs & Stratton 311553GS Pump. This genuine replacement pump is designed for select pressure washers and portable generators. Adhering to these guidelines will ensure optimal performance and longevity of the product. Please read this manual thoroughly before attempting any installation or operation.
2. Safety Information
Always observe safety precautions when working with power equipment and replacement parts. Failure to follow these instructions may result in injury or damage to equipment.
- Disconnect the power source from the pressure washer or generator before beginning any installation, maintenance, or repair work.
- Wear appropriate personal protective equipment, including safety glasses and gloves, during installation and maintenance.
- Ensure the work area is well-lit and clear of obstructions.
- Use only genuine Briggs & Stratton replacement parts to ensure compatibility and safety.
- If you are unsure about any step, consult a qualified service technician.
3. Setup & Installation
This section details the steps for installing the 311553GS pump onto your compatible pressure washer or portable generator.
3.1 Preparation
- Ensure the pressure washer or generator is turned off and cooled down.
- Disconnect the spark plug wire to prevent accidental starting.
- Drain any remaining water from the old pump and hoses.
- Gather necessary tools: an Allen wrench and a regular wrench are typically required.
3.2 Removing the Old Pump
- Locate the bolts securing the old pump to the engine. There are typically three bolts.
- Carefully remove these bolts using the appropriate wrench.
- Gently pull the old pump away from the engine shaft. If it is stuck, a slight twisting motion may help.
3.3 Installing the New Pump
The new pump is designed for a direct fit. Installation typically takes around 10 minutes.
- Apply a small amount of grease to the inside of the shaft adapter on the new pump. This aids in smooth installation onto the engine shaft.
- Align the new pump with the engine shaft and the mounting holes.
- Push the pump onto the shaft until it seats properly against the engine.
- Insert and tighten the three mounting bolts. Ensure they are securely fastened but do not overtighten.
- Connect all hoses and fittings to the new pump. Ensure all connections are tight to prevent leaks.
Figure 1: Side view of the Briggs & Stratton 311553GS Pump, showing mounting points and connections. This view is helpful for aligning the pump during installation.
Figure 2: Top view of the Briggs & Stratton 311553GS Pump, illustrating the main body and various ports. This perspective assists in identifying hose connections.
4. Operation
After installation, follow these steps to prepare your pressure washer for operation.
4.1 Priming the Pump
- Connect a garden hose to the water inlet of the pump.
- Turn on the water supply fully.
- Squeeze the trigger on the spray gun to purge air from the pump and hose system until a steady stream of water flows out. This primes the pump.
- Once primed, release the trigger.
4.2 Starting the Pressure Washer
- Reconnect the spark plug wire.
- Start the pressure washer engine according to its manufacturer's instructions.
- The pump will begin to build pressure. You can now use the pressure washer for its intended tasks.
5. Maintenance
Regular maintenance is crucial for extending the life and ensuring the efficient operation of your Briggs & Stratton 311553GS Pump.
5.1 Pump Oil Management
- Change Pump Oil: The oil supplied in the pump can degrade over time. It is recommended to change the pump oil regularly.
- Recommended Oil: Use a high-quality 90wt synthetic lubricant (e.g., 75W-90 synthetic gear oil).
- Frequency: Change the oil often, especially after initial break-in and then according to the pressure washer's maintenance schedule or more frequently with heavy use.
5.2 Check Valve and Internal Cleaning
- Inspect Check Valves: Periodically remove the check valve caps and inspect for any debris or residue. Clean as necessary.
- Pump Conditioner: Use a pump conditioner or protector to flush the pump out well, especially before storage or if used infrequently.
5.3 General Care
- Crankshaft Lubrication: Grease the crankshaft end periodically to ensure smooth operation and prevent corrosion.
- Fasteners: Ensure all fasteners are tight. Consider using blue Loctite on mounting bolts to prevent loosening from vibration.
- Inlet Filter: Install an inlet filter, especially if using well water or if your water supply contains particulates. Filters are inexpensive and protect the pump from damage.
Figure 3: The Briggs & Stratton 311553GS Pump shown with included accessories such as hoses, filters, and fittings. These components are vital for proper installation and maintenance.
6. Troubleshooting
This section addresses common issues you might encounter with your pump.
| Problem | Possible Cause | Solution |
|---|---|---|
| Water spraying from bolt locations | Damaged O-rings or threads around bolts. | Inspect O-rings and bolt threads. Replace damaged O-rings or consult a service technician if threads are compromised. Ensure bolts are tightened correctly. |
| Pump fails to siphon soap | Stuck bearing in the soap inlet port or clogged soap line. | Carefully remove and inspect the soap inlet port. Clean any debris and free the bearing. Ensure the soap hose is clear. Exercise caution as the casting can be fragile. |
| No water pressure or inconsistent flow | Air in the system, clogged inlet filter, or low water supply. | Ensure the pump is properly primed (see Section 4.1). Check and clean the inlet filter. Verify adequate water supply to the pump. |
| Pump is noisy or vibrating excessively | Loose mounting bolts, worn bearings, or cavitation. | Check and tighten all mounting bolts. Ensure the pump is receiving sufficient water to prevent cavitation. If noise persists, professional inspection may be required. |
7. Specifications
Key specifications for the Briggs & Stratton 311553GS Pump:
- Model Number: 311553GS
- Product Dimensions: 12.36 x 10.36 x 9.28 inches
- Item Weight: 6.42 pounds
- Manufacturer: Briggs & Stratton
- Compatibility: Genuine replacement pump for select Briggs & Stratton pressure washers and portable generators.
8. Warranty & Support
For warranty information and technical support, please refer to the documentation provided with your original pressure washer or generator, or visit the official Briggs & Stratton website. Keep your purchase receipt as proof of purchase for any warranty claims.
For genuine Briggs & Stratton parts and service, always ensure you are purchasing from authorized dealers or reputable sources.
