Monarch NG Series Gas Powered End Suction Centrifugal Pump & Repair Parts
Monarch NG Series Industrial Gas Powered Pump
The Monarch NG Series represents the gold standard in self-contained, gas-powered fluid transfer solutions. Designed with a close-coupled configuration where the pump impeller threads directly onto the engine shaft, this unit offers a compact yet incredibly powerful footprint.
Built for durability and high-pressure performance, the NG Series is constructed from rugged cast iron, making it the premier choice for turf maintenance, agricultural irrigation, and high-volume utility applications. Whether you are managing crop hydration or industrial water transfer, the Monarch NG Series delivers reliable efficiency day in and day out.
Key Features & Benefits
- Powerful Propulsion: Powered by an internationally renowned Briggs & Stratton Vanguard engine. This 18 HP powerhouse is equipped with adjustable throttle controls, a 12-volt electric start, and a generous 9-quart fuel tank for extended operation (Battery not included).
- Industrial-Grade Sealing: Features a self-lubricating mechanical seal with Buna-N bellows, complemented by brass and stainless steel hardware. Note: Special order materials like Viton, stainless steel, or tungsten carbide are available upon request.
- High-Efficiency Impeller: The enclosed design impeller is cast iron and dynamically balanced to ensure maximum hydraulic efficiency and smooth operation.
- Durable Casing: A thick-walled, heavy-duty cast iron casing is engineered specifically to handle high-pressure applications without compromising structural integrity.
- Replaceable Wear Rings: To extend the life of the pump, it includes bronze wear rings that are easily replaceable during maintenance.
- Corrosion Protection: Zinc-plated shaft sleeves are standard, providing essential protection for the engine shaft against corrosion and wear.
Applications
The Monarch NG Series is versatile and robust, specifically engineered for:
- Agricultural Irrigation: High-volume water movement for crops and fields.
- Turf Management: Reliable pressure for golf courses, sports fields, and large landscaping projects.
- Utility Pumping: General industrial water transfer requiring high head pressure.
- Construction Dewatering: Durable enough for job site water removal.
Technical Specifications
Pump & Engine Data
| Model No. | Item No. | HP | Suction NPT | Discharge NPT | Fuel Tank Capacity | Engine Description | Low Oil Shut Off | Ship Wt. (lbs.) |
|---|---|---|---|---|---|---|---|---|
| NG2 – 1/2 M9S-18V | 614228 | 18 | 3″ | 2 1/2″ | 9 qt. | B&S Vanguard (12 volt electric start) | YES | 299 |
Performance Chart (Capacities in U.S. GPM)
| Model No. | 30 PSI | 40 PSI | 50 PSI | 60 PSI | 70 PSI | 80 PSI | 90 PSI | 100 PSI | 110 PSI | 120 PSI | 130 PSI |
|---|---|---|---|---|---|---|---|---|---|---|---|
| NG2-1/2 M9S-18V | 356 | 337 | 295 | 268 | 234 | 204 | 171 | 130 | 95 | 65 | 30 |
Dimensional Outline
| Model No. | HP | Suction (NPT) | Discharge (NPT) | CP | D | G | O | W | Z | ZZ |
|---|---|---|---|---|---|---|---|---|---|---|
| NG2-1/2 M9S | 18 | 3 | 2 1/2 | 45.50 | 10.84 | 12.62 | 22.41 | 35.00 | 3.00 | 12.75 |
Repair Parts List: Model NG2-1/2 M9S
Irrigation & Utility Pumps (Gas Engine Driven)
Column Key:
- a) NG2-1/2 M9S-18B Type C
- b) NG2-1/2 M9S-18B Type D
- c) NG2-1/2 M9S-18V Type D
- d) NG2-1/2 M9S-18V Type E
| Ref.# | Code # | a | b | c | d | Description |
|---|---|---|---|---|---|---|
| 1** | 400004 | 1 | 1 | Casing | ||
| 1 | 400414 | 1 | 1 | Casing | ||
| 2 | 400293 | 1 | 1 | 1 | 1 | Impeller |
| 3 | 400305 | 1 | 1 | 1 | Engine Adapter | |
| 3 | 400292 | 1 | Engine Adapter | |||
| 5 | 400055 | 1 | 1 | Valve Body | ||
| 6 | 400062 | 1 | 1 | Valve Seat | ||
| 7* | 400068 | 1 | 1 | Flapper | ||
| 8* | 000075 | 1 | 1 | Washer | ||
| 11* | 400121 | 1 | 1 | 1 | 1 | Wear Ring |
| 12 | 200397 | 1 | 1 | 1 | Fuel Primer Bulb | |
| 13 | 200548 | 1 | 1 | 1 | Fuel Tank | |
| 14* | 400138 | 1 | 1 | 1 | 1 | Sleeve |
| 15* | 400081 | 1 | 1 | Valve Pin | ||
| 17* | 190835 | 1 | 1 | Flapper | ||
| 18* | 190838 | 1 | 1 | 1 | Gasket | |
| 19* | 190842 | 1 | 1 | Gasket | ||
| 20* | 190849 | 1 | 1 | 1 | 1 | Flinger |
| 22* | 240070 | 1 | 1 | 1 | 1 | Seal MS-7 |
| 25 | 226420 | 8 | 8 | 8 | 8 | Bolt |
| 26* | 145860 | 1 | 1 | Machine Screw | ||
| 27 | 170960 | 4 | 4 | Stud | ||
| 28 | 164631 | 4 | 4 | 4 | 4 | Stud |
| 29 | 227870 | 4 | 4 | Nut | ||
| 30 | 227830 | 16 | 16 | 16 | 10 | Nut |
| 31 | 185620 | 4 | 4 | 3 | 3 | Pipe Plug |
| 32 | 185630 | 1 | 1 | 1 | 1 | Pipe Plug |
| 33 | 400815 | 1 | 1 | 1 | Tank Strap | |
| 37 | 228000 | 4 | Bolt | |||
| 37 | 226010 | 4 | 4 | 4 | Bolt | |
| 38 | 227820 | 4 | 4 | 4 | 4 | Nut |
| 39 | 176220 | 4 | 4 | 4 | 4 | Spring Washer |
| 40 | 174440 | 4 | 4 | 4 | 4 | Plain Washer |
| 42 | 195185 | 1 | 1 | 1 | Adapter | |
| 46 | 226210 | 6 | 6 | 6 | Bolt | |
| 47 | 201934 | 1 | 1 | Engine B/S #350447 | ||
| 47 | 201971 | 1 | Engine B/S #422437 | |||
| 47 | 201941 | 1 | Engine B/S #356447 | |||
| 49 | 400816 | 1 | 1 | 1 | L/H Channel Assembly | |
| 49 | 400818 | 1 | L/H Channel Assembly | |||
| 50 | 400806 | 1 | 1 | 1 | R/H Channel Assembly | |
| 50 | 400817 | 1 | R/H Channel Assembly | |||
| 52 | 400808 | 1 | 1 | 1 | Fuel Line | |
| 53* | 400809 | 1 | 1 | 1 | Fuel Line | |
| 54 | 435480 | 1 | 1 | 1 | 1 | Battery Holder |
| 56 | 435485 | 1 | 1 | 1 | 1 | Battery Cover |
| 57 | 116701 | 4 | 4 | 4 | Hose Clamp | |
| 59 | 176230 | 6 | 6 | 6 | 4 | Spring Washer |
| 67 | 194867 | A/R | A/R | A/R | Rubber Strip | |
| 68 | 201972 | 1 | Throttle Control Lever | |||
| 69 | 400082 | 1 | Throttle Bracket | |||
| 71 | 144450 | 2 | Machine Screw | |||
| 72 | 226210 | 4 | 4 | 4 | 4 | Bolt |
| 73 | 174986 | 2 | 2 | 2 | 2 | Plain Washer |
| 75 | 400814 | 1 | 1 | 1 | L-Bracket |
Repair Parts List: NG2L8S Series
Models: NG2L8S-8B, NG2-1/2L8S-10B, NG2-1/2L8S-12K, NG2-1/2L8S-12KRF
Column Key:
- a) NG2L82-8B
- b) NG2-1/2L8S-10B
- c) NG2-1/2L8S-12K
- d) NG2-1/2L8S-12KRF
| Ref.# | Code # | a | b | c | d | Description |
|---|---|---|---|---|---|---|
| 1 | 400002 | 1 | Casing 2 X 2 | |||
| 1 | 400003 | 1 | 1 | 1 | Casing 2-1/2 X 2-1/2 | |
| 2A | 461807 | 1 | Impeller 7.50 dia. | |||
| 2A | 461808 | 1 | 1 | 1 | Impeller 7.31 dia. | |
| 3 | 400032 | 1 | 1 | 1 | 1 | Adapter |
| 5 | 400052 | 1 | Valve Body | |||
| 5 | 400055 | 1 | 1 | 1 | Valve Body | |
| 6A | 435042 | 1 | Valve Assy (6, 7, 8, 12, 17 & 26) | |||
| 6A | 435045 | 1 | 1 | 1 | Valve Assy (6, 7, 8, 12, 17 & 26) | |
| 6 | 400058 | 1 | Valve Seat | |||
| 6 | 400062 | 1 | 1 | 1 | Valve Seat | |
| 7 | 400065 | 1 | Flapper | |||
| 7 | 400068 | 1 | 1 | 1 | Flapper | |
| 8 | 000072 | 1 | Washer | |||
| 8 | 000075 | 1 | 1 | 1 | Washer | |
| 12 | 400081 | 1 | 1 | 1 | 1 | Valve Pin |
| 14* | 400132 | 1 | Sleeve | |||
| 14* | 404524 | 1 | 1 | 1 | Sleeve | |
| 17* | 190832 | 1 | Valve Seal | |||
| 17* | 190835 | 1 | 1 | 1 | Valve Seal | |
| 18* | 190837 | 1 | 1 | 1 | 1 | Gasket-Casing |
| 19* | 190841 | 1 | Gasket-Flange | |||
| 19* | 190842 | 1 | 1 | 1 | Gasket-Flange | |
| 20 | 190849 | 1 | 1 | 1 | 1 | Flinger |
| 22* | 240070 | 1 | 1 | 1 | 1 | Seal MS-7, 1-1/4 dia. |
| 25 | 120000 | 8 | 8 | 8 | 8 | Bolt 3/8 X 7/8 |
| 26 | 145860 | 1 | 1 | 1 | 1 | Machine Screw 1/4 X 5/8 |
| 27 | 165850 | 4 | Stud 5/8 UNC X 2 | |||
| 27 | 165860 | 4 | 4 | 4 | Stud 5/8 UNC X 2-1/4 | |
| 28 | 164650 | 4 | 4 | 4 | Stud 3/8 UNC X 2 | |
| 28 | 164640 | 4 | Stud 3/8 UNC X 2-1/2 | |||
| 29 | 128270 | 4 | 4 | 4 | 4 | Nut 5/8 UNC |
| 30 | 128230 | 4 | 4 | 4 | 4 | Nut 3/8 UNC |
| 31 | 185620 | 4 | 4 | 4 | 4 | Pipe Plug 1/4 NPT |
| 32 | 185630 | 1 | 1 | 1 | 1 | Pipe Plug 3/8 NPT |
| 40 | 176530 | 4 | 4 | Spring Washer 5/16 | ||
| 40 | 176540 | 4 | 4 | Spring Washer 3/8 | ||
| 41 | 128220 | 4 | 4 | Nut 5/16 UNC | ||
| 41 | 128230 | 4 | 4 | Nut 3/8 UNC | ||
| 42 | 176688 | 4 | 4 | 4 | 4 | Toothlock Washer 3/8 |
| 43 | 174440 | 4 | 4 | Washer 5/16 | ||
| 43 | 174450 | 4 | 4 | Washer 3/8 | ||
| 45 | 119810 | 4 | 4 | Bolt 5/16 UNC X 1-1/4 | ||
| 45 | 120030 | 4 | 4 | Bolt 3/8 UNC X 1-1/2 | ||
| 47 | 201918 | 1 | Engine B/S 8 HP | |||
| 47 | 201961 | 1 | Engine B/S 10 HP I/C | |||
| 47 | 201956 | 1 | 1 | Engine Kohler 12 HP | ||
| 48 | 414820 | 1 | 1 | 1 | L/H Channel | |
| 49 | 414830 | 1 | 1 | 1 | R/H Channel | |
| N/S | 465116 | 1 | Rollframe Weldment |
Frequently Asked Questions
Does the Monarch NG Series pump come with a battery?
No, while the pump features a 12-volt electric start system, the battery and cables are not included and must be purchased separately.
What type of engine powers the NG Series pump?
The NG Series is equipped with an 18 HP Briggs & Stratton Vanguard gas engine, known internationally for reliability and performance in industrial applications.
What materials are used in the pump construction?
The pump features a thick-walled cast iron casing, a cast iron enclosed impeller, and a self-lubricating mechanical seal with Buna-N bellows and brass/stainless steel hardware.
Is this pump suitable for high-pressure irrigation?
Yes, the rugged cast iron construction and high-performance impeller make it an excellent choice for high-pressure applications such as turf and agricultural irrigation.