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SEASTAR SOLUTIONS
Hynautic Heavy-Duty Helm Pumps—H-20 & H-40 Series

These helms combine one or two bi-directional axial piston pumps with pilot check and make-up check valving. The result is a unit that prevents rudder feedback, is very efficient (even at low rpm) and is immediately adaptable to multi-station use. Hynautic number H21 has a 1" straight shaft, and the H25 has a 3/4" tapered shaft.
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
Heavy-Duty Hynautic Helm Pump, 2.75 cu. in., 1" straight shaft with 1/4" square keyway, integral valving 204331 H-21
In stock online.

$799.00

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Heavy-Duty Hynautic Helm Pump, 2.75 cu. in., 3/4", 1"/ft tapered shaft with #9 Woodruff keyway, integral valving 204356 H-25
In stock online.

$919.00

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Heavy-Duty Hynautic Helm Pump, 2.00 cu. in., 3/4", 1"/ft tapered shaft with #9 Woodruff keyway, integral valving 6544175 H-26
Ships from vendor

$769.00

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Heavy-Duty Hynautic Helm Pump, 4.0 cu. in., 3/4", 1"/ft tapered shaft with #9 Woodruff keyway, integral valving 14660864 H-42-04
Ships from vendor

$1,569.00

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These helms combine one or two bi-directional axial piston pumps with pilot check and make-up check valving. The result is a unit that prevents rudder feedback, is very efficient (even at low rpm) and is immediately adaptable to multi-station use. Hynautic number H21 has a 1" straight shaft, and the H25 has a 3/4" tapered shaft.

Specs