Hose and Tubing

How to Measure Hydraulic Hoses

New Installation:

Measure hose routing path from wheel center line to engine connection, as follows:

A = Center line of wheel to gunwale (or deck, if routed downward),
B = Dash to transom,
C = Gunwale to centerline of cable connection at centered tiller.

Most cylinders move with the engine/rudder; enough slack must be left in hoses/tubing to prevent sharp bends (less than 3” radius) and/or kinking.

Where rigid tubing is used, flexible hoses must be installed between tubing and cylinder, to allow cylinder articulation.

For Most Cylinders, add A, B & C + 24”, round up to next even foot. Order that length hose kit, or twice that length in tubing.

Hose routings (such as those found on pontoon boats) may vary from this drawing. Confirm length by laying a garden hose along cable path and measure run from wheel to engine connection point.

Typical Single Station Routing

A single, front-mount outboard cylinder system is shown in this diagram.

If your hydraulic system is different than the one depicted and/or you have any questions about hydraulic steering after reviewing this guide, please contact SeaStar Solutions® Technical Service.

Replacement of Hydraulic Steering:

If you removed the old hoses, measure for replacement hoses as follows:

Measure existing hose from tip to tip, round up to next even foot. Order that length hose kit, or twice that length in tubing.


BAYSTAR  Tubing (HT44_ _/HT44_ _H)

Can be used with all BayStar helms, with appropriate fittings. Kit contains two cut lengths of tubing.
BayStar Tubing Kits:
20’ kit (2 x 20’ lengths tubing): HT4420H
30’ kit (2 x 30’ lengths tubing): HT4430H
(NOTE: BayStar Cylinders with H suffix must use tubing part number with H suffix.)

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SEASTAR Outboard Hose Kit (HO51_ _*)
Includes two hoses – can be used with all SeaStar systems, except SeaStar PRO, BayStar, Capilano and 3-line inboard systems.

SEASTAR PRO Outboard HOSE KIT (HO57_ _*)
Includes two hoses – can be used with all SeaStar systems, except BayStar, Capilano and 3-line inboard systems.

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SEASTAR Bulkhead Hose Kits (HO81_ _*)
SeaStar® Bulkhead Hose Kits assure a neat hydraulic steering installation. Each hose has an integral bulkhead fitting for tidy routing of hoses through a splashwell bulkhead, helping to eliminate excess loose hose, kinking or chafing. Includes two hoses – can be used with all SeaStar systems, except BayStar, Capilano and 3-line inboard.

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Boxed Hose Sets:
SeaStar Bulkhead Hose Kit (2 hoses): HO81_ _
SeaStar PRO Bulkhead Hose Kit (2 hoses): HO82_ _

Bulk-packed Hose Pairs:
SeaStar Bulkhead Hose Kit (2 hoses): HO83_ _
SeaStar PRO Bulkhead Hose Kit (2 hoses): HO84_ _

Nylon Tubing (HT5_ _ _)
Can be used with SeaStar 1.7 helms on stern drives (except with HC5332 cylinder) and small inboards with fitting kit; do not use on outboard systems.
Part #  Length x OD
HT5092 25’ x 3/8”
HT5095 50’ x 3/8”
HT5097 75’ x 38”
HT5100 100’ x 3/8”

Stainless Steel Bulkhead Hose Kits:
SeaStar Single Stainless Steel Bulkhead Hose Kit (2 hoses): HO86XX
SeaStar Single Stainless Steel Pro Bulkhead Hose Kit (2 hoses): HO87XX
SeaStar Double Stainless Steel Bulkhead Hose Kit (2 hoses): HO88XX
SeaStar Double Stainless Steel Pro Bulkhead Hose Kit (2 hoses): HO89XX

* SeaStar and SeaStar Pro Hose Kits are available in lengths from 2 foot to 30 foot. 40 foot hose kits are special order only.