Hayward EcoStar & TriStar Pump Motor 2.7HP Square Flange | SPX3400Z1ECM

Hayward SPX3400Z1ECM 2.7 HP Variable-Speed Permanent Magnet Motor Assembly (Square Flange)

Hayward SPX3400Z1ECM is a genuine replacement variable-speed (VS) permanent magnet motor assembly used on select Hayward VS pool pumps. This motor is commonly used as the replacement motor for EcoStar and TriStar VS platforms that use the 2.7 HP square-flange ECM motor.

Key Features

• Part Number: SPX3400Z1ECM
• Brand: Hayward
• Type: Variable-speed permanent magnet motor assembly (ECM)
• Horsepower: 2.7 HP (class)
• Mount: Square flange
• Designed for efficient, quiet VS pump operation
• Approx. Shipping Weight: 40 lb (typical listing)
• Replacement part warranty: commonly listed as 1-year parts-only (check your seller/manufacturer terms)

Common Compatibility (Verify Before Ordering)

• Hayward EcoStar Variable Speed pumps (commonly referenced: SP3400VSP, SP3400VSPVR)
• Hayward TriStar VS 900/950 motor assembly applications (many references note TriStar VS 950 models manufactured before Jan 2019)
• Also commonly referenced for select Hayward commercial/HCP variable-speed platforms that use the same 2.7 HP square-flange ECM motor (model dependent)

What This Replaces / Fixes

• Motor failure (won’t start, overheating, trips breaker, noisy bearings)
• Intermittent operation or loss of speed control due to a failed motor section
• Motor damage from water intrusion, corrosion, or age-related wear

Installation Notes

• Match the pump model and motor type exactly—variable-speed motors are not interchangeable across all Hayward VS pumps.
• Shut off power at the breaker before servicing any pump wiring or motor components.
• Inspect the pump shaft seal and housing gaskets during service; replacing seals during motor work helps prevent future leaks.
• After installation, confirm normal priming, operation across speeds, and that the motor remains dry and well-ventilated.
• Professional installation is recommended if you’re not familiar with VS pump wiring and configuration.

Related Products

• Hayward SPX3400Z1ECM
• Hayward EcoStar Pump Parts
• Hayward TriStar VS Pump Parts
• Hayward Pump Shaft Seals
• Hayward Pump O-Rings & Gaskets
• Pool Pump Unions & Plumbing Accessories

Maintenance Tips

• Keep the motor area dry and shaded when possible—heat and water intrusion are common causes of premature motor/drive failure.
• Maintain proper water chemistry to reduce corrosion at the equipment pad.
• Address seal plate or shaft seal leaks immediately to protect the motor from water damage.
• Keep baskets and filters clean to reduce pump strain and avoid operating the pump in cavitation conditions.