Franklin Electric FNG-23V Gas Engine Centrifugal Pump
FNG-23V Pump Manuals & Resources
The Franklin Electric FNG-23V gas engine centrifugal pump is a close-coupled, end-suction pump designed for water truck service, irrigation, construction, municipal water transfer and general utility pumping where a gasoline engine is more practical than an electric motor. Its 23 HP Briggs & Stratton Vanguard V-Twin engine drives a balanced cast iron impeller, with a replaceable bronze wear ring and a Type 21 mechanical seal for serviceability.
Ken’s Distributing Company (Kendisco) can help identify the FNG-23V pump configuration and replacement parts. Order identifiers have changed in Franklin Electric’s catalog: the earlier literature lists item 90261223 (FNG-23VM, commonly described with a 627 cc engine), while Franklin’s current listing shows 90261223A (FNG-23VM with an 8.00-inch impeller trim and a 623 cc engine specification). Confirm the complete pump, impeller trim, engine data plate and replacement-part compatibility before ordering. Do not assume the two item numbers are interchangeable.
What Is the Franklin Electric FNG-23V End-Suction Pump?
The FNG-23V is a non-self-priming centrifugal pump. Its impeller threads directly to the engine shaft in a close-coupled arrangement. This eliminates a separate coupling and bearing frame. Unlike the self-priming FBSGF or FNSGF series, the FNG-23V needs an appropriately primed pump casing and suction system before startup, following the Franklin Electric FNG Series manual.
The cast iron casing includes venting and draining provisions. The enclosed cast iron impeller serves general water-transfer applications, while the replaceable bronze wear ring allows worn clearances to be addressed during maintenance. The 23 HP Vanguard engine has cast iron cylinder sleeves and electric start; the starting battery and battery cables must be supplied separately.
FNG-23V Technical Specifications
| Specification | Details |
|---|---|
| Pump series | Franklin Electric FNG-23V, end-suction centrifugal |
| Configuration | Gas engine driven, close-coupled; not self-priming |
| Engine | 23 HP Briggs & Stratton Vanguard V-Twin |
| Pump casing / volute | Cast iron |
| Impeller | Enclosed, balanced cast iron |
| Mechanical seal | Type 21, 1-1/4 inch; original replacement-seal reference uses carbon/ceramic, FKM and 316 stainless steel |
| Replaceable wear ring | Bronze (original parts table identifies SAE 660 brass) |
| Maximum capacity in historical series literature | 400 GPM (maximum at a particular operating condition; see curve) |
| Maximum head in historical series literature | 275 ft (separate maximum from flow) |
| Maximum pressure | 125 PSI |
| Maximum liquid temperature | 212°F (100°C) |
| Suction | 3-inch NPT |
| Discharge | 2-1/2-inch NPT |
| Engine start | Electric start; battery and cables are not included |
| Low-oil indication | Oil pressure switch fitted; warning light not included |
| Rotation | Clockwise viewed from engine end (historical literature) |
| Mounting | Horizontal |
| Listed unit weight | 206 lb |
Performance guidance: Franklin’s historical series literature lists capacities up to 400 GPM and heads up to 275 feet. These are individual limits, not a promise of 400 GPM at 275 feet of head. Use the relevant performance curve and specific impeller trim to size the pump. Franklin’s current 90261223A listing identifies an 8.00-inch impeller trim, so do not automatically apply historical curve limits to that configuration.
FNG-23V Model and Ordering Information
| Catalog reference | Model / configuration | Engine information | Connections | Ordering note |
|---|---|---|---|---|
| 90261223 (earlier listing) | FNG-23VM | 23 HP Briggs & Stratton Vanguard V-Twin; 627 cc in earlier catalog | 3-inch suction / 2-1/2-inch discharge | Earlier published order number; verify availability and serial/model before ordering |
| 90261223A (current Franklin listing) | FNG-23VM with 8.00-inch impeller trim | 23 HP Briggs & Stratton; 623 cc stated in current Franklin listing | 3-inch suction / 2-1/2-inch discharge | Current manufacturer listing; confirm trim and repair-part compatibility |
For the earlier Kendisco item reference, see FNG-23VM, item 90261223. For the current manufacturer variant, see Franklin Electric item 90261223A.
Key Features and Benefits
- 23 HP gas engine: Briggs & Stratton Vanguard V-Twin power for applications without convenient electric service.
- Close-coupled pump: The impeller mounts directly to the engine shaft, without a separate pump bearing frame or drive coupling.
- Enclosed, balanced cast iron impeller: Designed for general-service water transfer and higher-head centrifugal pumping applications.
- Replaceable bronze wear ring: Supports pump-end maintenance when wear affects running clearances.
- Type 21 mechanical seal: 1-1/4-inch design. Confirm the replacement part against the pump configuration before service.
- Electric start: Battery and cables are not supplied with the pump.
- Low-oil alert provision: An oil-pressure switch is included, but the warning light is not. Do not treat it as a confirmed automatic engine shutdown.
- 3-inch NPT suction and 2-1/2-inch NPT discharge: Match hose, pipe and pressure ratings to the pump and application.
Applications
- Water trucks: Water transfer and filling for roadwork, dust control and site operations.
- Agriculture and irrigation: Water supply and transfer where suitable gasoline-powered pumping is needed.
- Construction: General site water transfer and appropriate clean-water dewatering applications.
- Municipal service: Portable water-transfer and maintenance uses.
- Commercial and industrial: General-service water pumping where the liquid is compatible with cast iron and mechanical-seal materials.
This model is not presented as a trash pump or a self-priming pump. Confirm liquid cleanliness, suction conditions, flow rate and total dynamic head before choosing it for dewatering or other site work.
FNG-23V Performance Curves
Use the performance chart to determine expected flow at the actual operating head. The maximum published flow and maximum head do not occur together. Verify which curve applies to the impeller diameter supplied with the specific unit.
FNG-23V Dimensions
The dimensional drawing is supplied for planning the mounting footprint and pipe connections. Confirm final dimensions against the exact model and engine configuration before fabricating a skid, trailer or truck mounting assembly.
FNG-23V Exploded View and Replacement Parts
The following detailed parts reference preserves all figure numbers, descriptions, part numbers and materials from the original Kendisco FNG-23V page. It supports identification of the earlier 90261223 configuration. Confirm suitability for 90261223A and other production revisions before ordering replacement parts.
| Fig. No. | Description | Part No. | Materials |
|---|---|---|---|
| 1 | FNG-23V Pump Case | 305457001 | Cast Iron, ASTM-A48 CL30 |
| 2 | FNG-23V Impeller | 305457012 | Cast Iron, ASTM-A48 CL30 |
| 3 | FNG-23V Motor Adapter | 305457003 | Cast Iron, ASTM-A48 CL30 |
| 4 | FNG-23V Wear Ring (Suction) | 305457004 | SAE 660 Brass |
| 12 | FNG-23V Shaft Sleeve, Mechanical Seal | 305457005 | 416 Stainless Steel |
| 70 | FNG-23V Base, Engine Frame | 305459024 | Various |
| 76 | FNG-23V Battery Holder Assembly | 305457008 | Various |
| 82 | FNG-23V Muffler | 305457013 | Various |
| 90 | FNG-23V Mechanical Shaft Seal | 305457011 | Carbon / Ceramic FKM / 316SS |
| 100 | FNG-23V Case Gasket | 305457009 | NA60 |
| 200 | FNG-23V Engine B/S 23 hp | 201942 | Misc. |
| 500A | FNG-23V Pipe Plug 1/4″ (3 Req.) | 305463020 | Cad-Plated Steel |
| 500B | FNG-23V Pipe Plug 3/8″ (1 Req.) | 305463175 | Cad-Plated Steel |
| 503 | FNG-23V Water Slinger | 305457010 | Neoprene |
| 530A | FNG-23V Hex Bolt – Volute (8 Req) 7/16-14 | 305463183 | Zinc-Plated Steel |
| 530B | FNG-23V Hex Nut – Engine (8-Pack) | 305463033 | Zinc-Plated Steel |
| 530C | FNG-23V Lockwasher – Engine (8-Pack) | 305463135 | Zinc-Plated Steel |
| 530D | FNG-23V Hex Bolt – Motor Base (4 Req.) | 305463111 | Zinc-Plated Steel |
| 530E | FNG-23V Washer – Motor Base (4 Req.) | 305463247 | Zinc-Plated Steel |
| 530F | FNG-23V Lockwasher – Motor Base (4 Req.) | 305463092 | Zinc-Plated Steel |
| 530G | FNG-23V Hex Nut – Motor Base (4 Req.) | 305463062 | Zinc-Plated Steel |
| 531 | FNG-23V Threaded Stud (4 Req.) | 305463093 | Zinc-Plated Steel |
| 532 | FNG-23V Spacer (4-Pack) | 305463215 | Cast Iron |
For replacement components, provide the model, complete order/item number and engine identification. Frequently requested original parts include the pump case (305457001), impeller (305457012), bronze wear ring (305457004), mechanical shaft seal (305457011), case gasket (305457009) and engine part reference (201942). Engine-service items may require the engine manufacturer’s model and serial number.
Installation, Priming and Service Considerations
- Priming is required: The FNG-23V is not self-priming. Follow the FNG Series manual to prime the suction line and pump casing. In standard suction-lift installations, the manual discusses a suitable foot valve and strainer; high-static-head applications require different precautions.
- Suction piping: Use correctly sized, airtight suction piping or hose and avoid restrictive elbows and undersized inlet connections.
- Discharge piping: Use hose and fittings rated for the operating pressure; support piping independently and follow the manual’s valve recommendations.
- Start-up: Check engine oil level and follow the Briggs & Stratton engine instructions. Do not change the factory governor speed setting.
- Protect the seal: Do not run the pump dry or continuously against a closed discharge.
- Electric start: Obtain the compatible battery and cables separately; the oil-pressure warning light is also not supplied.
- Freeze protection: Drain the casing before freezing weather or extended storage.
- Servicing: Inspect the replaceable wear ring, impeller, casing gasket and mechanical seal when performance declines or leakage is observed.
Consult the Franklin Electric FNG-23V manufacturer page for current product identification and supporting documentation.
Frequently Asked Questions
What is the Franklin Electric FNG-23V used for?
It is a close-coupled gas engine centrifugal pump used for water truck, irrigation, construction, commercial, municipal and general water-transfer applications. Verify that the liquid and required hydraulic duty suit the model before ordering.
Is the FNG-23V self-priming?
No. The pump casing and suction system must be primed according to the FNG Series manual before the pump is started. A properly designed suction system and suitable foot valve can help maintain prime when the application permits.
What are the maximum flow and head figures?
Earlier Franklin Electric literature gives series maximums of 400 GPM and 275 feet of head, respectively. These limits do not describe one operating point. A current 8.00-inch-trim model should be checked against the appropriate performance curve.
What is the difference between FNG-23V item 90261223 and 90261223A?
90261223 is the earlier published identifier, while Franklin’s current product page lists 90261223A as FNG-23VM with an 8.00-inch impeller trim. The earlier literature describes a 627 cc engine; the current listing states 623 cc. Confirm the exact unit and production revision rather than assuming identical equipment or parts compatibility.
What engine and starting system does the pump use?
The FNG-23V uses a 23 HP Briggs & Stratton Vanguard V-Twin gas engine with electric start. The battery and starting cables are not included. An oil-pressure switch for low-oil indication is installed, but the warning light is not included.
What are the suction and discharge connection sizes?
Published configurations use a 3-inch NPT suction and a 2-1/2-inch NPT discharge connection.
What seal and wear-ring parts are listed for FNG-23V?
The historical parts reference lists mechanical shaft seal 305457011 and suction wear ring 305457004. Confirm the exact pump revision and engine details before ordering.
Where can I get help identifying FNG-23V replacement parts?
Contact Ken’s Distributing Company with the complete model and item number, the engine data-plate information and the required figure or part number from the table above.
Related Franklin Electric Products
- Franklin Electric FACGF gas engine centrifugal pumps
- Franklin Electric FBSGF gas engine self-priming pumps
- Franklin Electric FNSGF gas engine self-priming pumps
- Water truck pumps
- Franklin Electric replacement parts and repair kits
Request a Quote for the Franklin Electric FNG-23V
Need help with the FNG-23V pump, identifying 90261223 versus 90261223A, or selecting a repair part? Contact Ken’s Distributing Company at 303-699-7845. Provide your model, serial/engine identification and required flow and head for accurate product selection.
Send us your model number and we will confirm fit, price, and availability.