Petrol Water Pump
BON-P-WP4.0-272
Pump Type
Centrifugal Self Priming, Monoblock Horizontal With Mechanical Seal
Displacement
272 CC
Engine Power
9 HP
Start System
Recoil
Suction Port Diameter
4 inches
Discharge Port Diameter
4 inches
Total Head (m)
25
Suction Lift (m)
6
Maximum Discharge (Litre Per Hour)
105000
Dry Weight (kg)
37
Impeller
4 Vane Cast Iron
Compression Ratio
8.5:1
Volute
Rigid Mounted Cast Iron
Mechanical Seal(Pump case)
Silicon Carbide
BON-P-WP4.0-272: High-Capacity Centrifugal Pump
The BON-P-WP4.0-272 is a high-performance centrifugal self-priming water pump designed for heavy-duty applications. With a powerful 9 HP engine and a displacement of 272 CC, this pump achieves an impressive maximum discharge of 105,000 litres per hour. It features a 4-inch suction and discharge port, allowing for efficient water flow and handling. The pump can achieve a total head of 25 meters and a suction lift of 6 meters, making it suitable for various demanding water transfer tasks. Its recoil start system ensures easy and reliable operation.
Durable and Robust Design
Built to last, the BON-P-WP4.0-272 includes a 4-vane cast iron impeller and a rigid mounted cast iron volute for enhanced durability. The mechanical seal made of silicon carbide in the pump case ensures long-term reliability and minimal maintenance. Weighing 37 kg, this pump combines robust performance with a sturdy design, making it ideal for industrial, agricultural, and large-scale water management applications.
Frequently Asked Questions
Flush the pump case with clean fresh water, then completely drain to prevent damage from freezing. Cover intake and discharge ports to prevent the entry of debris during storage. The term Self Priming is actually an industry term that describes the ability of a pump to create a partial vacuum by purging air from the intake hose and pump casing. All Honda pumps are self priming by definition. All self priming pumps require water to be added to the pump casing to start the priming process.
Place the pump as close to the water source as possible. The less lift required will improve priming time. Fill the pump case completely with water (Never operate a centrifugal pump without water in the pump casing). Start the pump engine. By partially restricting the discharge hose, priming time can be improved. Shutting off a pump will allow water to flow out of the suction hose, requiring priming. The use of a foot valve on the end of the suction hose will prevent water from flowing out of the suction hose if you stop the pump and reduce time required for the pump to regain its prime. Wear off the volute and Impeller can decrease pump performance and increase time required to prime the pump. Regular inspection and maintenance of your pump will maintain peak performance.
Bonhoeffer water pumps are developed, tested and certified with petroleum based motor oils as a lubricant. Synthetic oils may be used; however, any motor oil used in our water pump must meet all oil requirements as stated in the owner manual. In addition, recommended oil change intervals must be followed.
See our Carburettor workshop Sheet to learn more about cleaning carburettors. Please be aware that the water pump should be serviced by a Bonhoeffer Authorized Dealer unless the owner has proper tools, service data and the necessary technical skills.
Bonhoeffer water pumps are designed and certified to run on regular unleaded gasoline containing no more than 5% ethanol (E10). Always refer to the owner's manual for your Bonhoeffer to get a list of recommended fuel and the current approved additives. For more information, see our Fuel Recommendations Link. Download or print a handout on how to avoid fuel-related problems for your Bonhoeffer general purpose water pump.
If you purchased a new piece of equipment and are missing parts or manuals, you need to contact your selling dealer. If you have further questions, you may contact our Customer Relations office at Manuals and Brochures.
Owner's Manuals for General Purpose Water pump can be downloaded from our website.
If a problem occurs with the spark plug: Check the spark plug HT wire and connect it if necessary. Remove the spark plug cap. Clean any dirt from around the spark plug base, and then remove the spark plug. Grounding the side electrode to the engine, pull the recoil starter to see if sparks jump across the gap. If there is no spark, replace the plug. If there is a spark, reinstall the spark plug and start again. If the air cleaner is clogged, clean or replace the air cleaner. If the carburetor is clogged, clean the carburetor (see our carburettor workshop sheet). Check if the valve clearance is correct. If not, readjust the valve clearance to the correct setting with a filler gauge. Check if the governor is out of adjustment. If so, readjust the governor. If the problem is not solved, take your water pump to an authorised Bonhoeffer dealer.
