12 Volt Fuel Pump Replace Facet 40189 40189N 3.5 5 PSI for ONAN 149 2272 149 2145

Product Overview

This 12‑volt Fuel Pump delivers a steady 3.5‑5 PSI flow for small engines, generators, and industrial equipment. It directly replaces Facet 40189 and 40189N and is designed for ONAN generator models that use part numbers 149‑2272 or 149‑2145. The pump provides reliable fuel delivery in demanding environments.

Key Features & Performance

• 12‑volt DC operation for compatibility with battery‑powered systems
• Output pressure range of 3.5‑5 PSI for carbureted engines
• Direct replacement for Facet 40189, 40189N, and cross‑references 149‑2272, 149‑2145
• Compact inline design with 1/8” NPT or barbed fuel inlet/outlet
• Built‑in check valve prevents fuel backflow when off
• Flow rate sufficient for engines up to approximately 20 HP

Fitment & Compatibility

• Replaces Facet 40189 and 40189N
• Compatible with ONAN engines using part number 149‑2272
• Compatible with ONAN engines using part number 149‑2145
• Fits many small engines, generators, and marine applications requiring 3.5‑5 PSI fuel pumps

Common Uses

• Replacing failed fuel pumps on ONAN RV generators
• Fuel delivery for small stationary engines, pumps, and welders
• Used in agricultural and industrial equipment with low‑pressure fuel systems

Technical Specifications

• Part Number(s): Replaces Facet 40189, 40189N; cross‑references 149‑2272, 149‑2145
• Voltage: 12 V DC
• Pressure Range: 3.5–5 PSI
• Flow Rate: 20–25 gallons per hour (approx.)
• Fuel Type: Gasoline, diesel compatible

Frequently Asked Questions

Q: Is this pump suitable for continuous duty in a generator? A: Yes, it is designed for continuous operation and can handle the heat and vibration of generator applications.

Q: Does this pump require a regulator if used on a carbureted engine? A: No, the 3.5‑5 PSI output is ideal for most small carburetors; no external regulator is needed.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.