Determining how much oil a Honda pressure washer pump holds requires looking at the specific model of Honda pressure washer. Honda makes different models of pressure washers for home and commercial use that come with different pump types and capacities.
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Quick Answer
Most common Honda home pressure washer pumps hold between 0.16 and 0.35 quarts (5.5-12 oz) of pump oil. Commercial models hold more.
Honda Home Pressure Washer Models and Pump Oil Capacities
Here are some of Honda’s most popular home pressure washer models and the oil capacity of their pumps:
| Honda Model | Pump Type | Pump Oil Capacity |
|---|---|---|
| Honda GC160 | Axial cam pump | 0.16 qt (5.5 oz) |
| Honda GC190 | Axial cam pump | 0.16 qt (5.5 oz) |
| Honda GC160 | Triplex plunger pump | 0.32 qt (11 oz) |
| Honda GC190 | Triplex plunger pump | 0.35 qt (12 oz) |
As you can see, the oil capacity can range from around 0.16 quarts to 0.35 quarts depending on the pump type. The axial cam pumps require less oil than the triplex plunger pumps.
Axial Cam Pump
The GC160 and GC190 models with axial cam pumps only require around 0.16 quarts (5.5 oz) of pump oil. These lower output pressure washers are meant for typical residential use.
Triplex Plunger Pump
The GC160 and GC190 models with triplex plunger pumps need 0.32-0.35 quarts (11-12 oz) of oil. These heavy duty pumps are found on models meant for more demanding jobs.
Honda Commercial Pressure Washer Models
Honda’s commercial pressure washer models designed for professional use have higher oil capacities in their pumps. Here are some examples:
| Honda Model | Pump Type | Pump Oil Capacity |
|---|---|---|
| Honda GX390 | Triplex plunger pump | 0.53 qt (18 oz) |
| Honda GX610 | Triplex ceramic plunger pump | 1.85 qt (64 oz) |
| Honda GX690 | Triplex ceramic plunger pump | 1.85 qt (64 oz) |
These heavy duty pumps require significantly more oil with capacities up to 1.85 quarts (64 oz). Always follow the owner’s manual for the specific model’s oil capacity.
Oil Type for Honda Pressure Washer Pumps
Honda recommends using their specially formulated pressure washer pump oil for best performance and protection. For small pumps, they recommend Honda Pressure Washer Oil.
For larger commercial pumps, they recommend Honda Power Equipment Pump Oil. Using the manufacturer’s oil helps maximize pump life.
Checking and Adding Oil
Check the oil level in the pump regularly per the manual’s guidelines. Low oil levels can cause damage over time. Here are some tips when adding oil:
- Make sure the pressure washer is on a level surface.
- Unscrew the oil plug/dipstick and wipe it clean.
- Insert the dipstick without screwing it in and check the level.
- If low, add oil slowly until it reaches the full mark.
- Replace the dipstick and tighten securely.
Adding too much oil can cause leaks or damage. Always use a funnel when adding oil to prevent spills and overfill.
Changing the Oil
Routine oil changes keep contaminants from building up and wearing down the pump’s components. Follow the manufacturer’s recommendations for when to replace the oil.
It’s typically recommended to change the pump oil after the first 20 hours of use on a new pressure washer. Subsequently change the oil every 100 hours or once yearly, whichever comes first.
To drain the old oil:
- Run the pressure washer briefly to warm up the oil so it will drain better.
- Shut off and disconnect the spark plug wire.
- Place a drain pan under the pump’s oil drain plug.
- Remove the drain plug carefully and allow the oil to fully drain.
- Replace the drain plug when finished.
Then refill the pump with fresh oil as outlined in the adding oil steps above.
Conclusion
Most Honda home pressure washer pumps hold between 0.16 and 0.35 quarts of oil depending on the pump type. The axial cam pumps require around 0.16 quarts, while the triplex plunger pumps need 0.32-0.35 quarts.
Larger commercial models hold more, up to 1.85 quarts for the biggest pumps. Always check your owner’s manual for the proper oil capacity, oil type, and maintenance recommendations.
Regularly checking the oil, changing it as directed, and using Honda’s specially formulated oil will maximize the pump’s life. This helps ensure your Honda pressure washer performs when you need it.