Uflex UP28FM Front Mount Hydraulic Helm Pump, 1.7 Cu In, Bass Boat Steering, 1500 PSI

The Uflex UP28FM is a front mount hydraulic helm pump built for bass boat applications where a quick, precise steering response matters. It is part of the Uflex UP-BB series, engineered for the high horsepower, high torque outboards found on fast bass boats with very shallow deadrise hulls. Uflex describes this line as the racecar of helms, built to feel tight and responsive under load.

The UP28FM has a 1.7 cubic inch displacement and features a 1500 psi (105 bar) pressure relief valve, letting it deliver precise steering even at high torque loads. Internally, a ball bearing piston race keeps the steering feel smooth, while a built-in lock valve holds the rudder in position when the helm is not being turned. An integrated relief valve protects the system from over-pressure damage at 105 bar (1500 psi). The pump uses a 3/4 inch tapered stainless steel shaft for long-term durability and 90 degree adjustable nickel-plated brass fittings that make hose routing easier in tight helm installations.

For correct high-torque performance, the UP28FM must be paired with the Uflex UC128-SVS hydraulic cylinder and the Uflex Kit OB-SVS hose kit, both purpose-built for this same high-torque application. This helm pump is intended for bass boat steering systems and similar fast, shallow-deadrise vessels running high horsepower motors.

Specifications

• Brand: Uflex
• Manufacturer Part Number: UP28FM
• Product Category: Helm Pump, Front Mount
• Displacement: 1.7 cubic inches
• Maximum Pressure: 1500 psi (105 bar)
• Shaft: 3/4 inch tapered stainless steel
• Fittings: 90 degree adjustable, nickel-plated brass
• Piston Race: Ball bearing
• Lock Valve: Built-in, for positive rudder lock
• Relief Valve: Integrated, over-pressure protection to 105 bar (1500 psi)
• Recommended Cylinder: Uflex UC128-SVS
• Recommended Hose Kit: Uflex Kit OB-SVS
• Weight: 11.2 pounds
• UPC: 702755021612

Fitment

Designed for bass boats and similar fast, shallow-deadrise vessels equipped with high horsepower, high torque outboard motors that require a quick-response front mount helm.

Replaces (OEM)

The UP28FM is a Uflex helm pump in its own product line; no OEM cross-reference or replacement numbers apply.

Frequently Asked Questions

What boats is the Uflex UP28FM designed for? The UP28FM is a front mount helm pump designed specifically for bass boat applications with high horsepower, high torque outboard motors on fast, shallow-deadrise hulls.

What is the displacement of the UP28FM helm pump? The UP28FM has a displacement of 1.7 cubic inches, the middle size in the Uflex UP-BB front mount helm series alongside the UP25FM and UP33FM.

What pressure rating does the UP28FM have? It carries a 1500 psi (105 bar) pressure relief valve, which lets it deliver precise steering even under high torque loads.

Does the UP28FM need a specific cylinder and hoses? Yes, for correct high-torque performance the UP28FM must be paired with the Uflex UC128-SVS hydraulic cylinder and the Uflex Kit OB-SVS hose kit, both built for the same high-torque application.

What is the shaft made of on the UP28FM? The UP28FM uses a 3/4 inch tapered stainless steel shaft.

What type of fittings come on this helm pump? The UP28FM has 90 degree adjustable, nickel-plated brass fittings, which make hose routing easier in tight helm installations.

Is there a lock feature to hold the rudder in place? Yes, the UP28FM has a built-in lock valve that provides positive rudder lock when the helm is not being turned.

How much does the UP28FM weigh? The Uflex UP28FM weighs 11.2 pounds.

What protects the UP28FM from over-pressure damage? An integrated relief valve protects the system from over-pressure, rated to 105 bar (1500 psi).

How does the UP28FM differ from the UP25FM and UP33FM? All three are part of the Uflex UP-BB front mount helm series for bass boats and share the same features, but differ in displacement size; the UP28FM is the 1.7 cubic inch version.

Does the UP28FM include OEM cross-reference or replacement part numbers? No, the UP28FM is a Uflex helm pump in its own dedicated product line, so there are no OEM replacement numbers associated with it.

What keeps the steering feel smooth on the UP28FM? A ball bearing piston race inside the UP28FM keeps the steering action smooth and responsive.