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Seastar Hydraulic Cylinder Catamaran Outboard HC5343

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Tandem Catamaran Outboard Steering Cylinder

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Out of stock

SKU: 291006 Categories: ,

UPC: 9319786035160

Condition:  New

On Backorder

Due to size - item will be posted regular post.



Tandem Catamaran Outboard Steering Cylinder

This balanced cylinder from SeaStar has been specifically developed to simply and economically link twin engine installations with one common cylinder

The cylinder is ideally suited to catamarans and pod type installations SeaStar have taken a standard front mount cylinder and changed the mounting configuration so that the cylinder remains stationary while the push rod actuates motor direction

The cylinder is designed to be mounted between the two engines with custom link arms connecting each rod end to the tiller arms of each engine

A ball joint fitted at either end of the push rod provides individual flexibility for the motors

The cylinder is mounted via four x 5 16 UNC bolts directly to the transom or pod of the vessel. As with all hydraulic cylinders the bleed nipple points must be at the highest point of cylinder installation. The cylinder features an anodised alloy barrel and chromed stainless steel shaft for extended seal life.

The SeaStar Helm Pump is an axial piston pump specifically designed for manual steering. Every load bearing point within the helm pump runs on either a roller or ball bearing race for super low friction smooth positive steering It has a built in lock valve to prevent the steering load from feeding back to the driver.

The lock valve will not allow the rudder or drive unit to move until you apply load by turning the steering wheel. The lock valve section of the helm also includes a relief valve. This relief valve provides over pressure protection for mechanical components hydraulic hoses and fittings

RECOMMENDED FOR OEM INSTALLATION To establish whether or not this cylinder would be suitable for your application the following points should be considered

1 Fore and aft alignment of cylinder. If not mounted in line motors will have different turning radius

2 Distance between motors

3 Distance of travel in tilt arc

4 Horizontal alignment of cylinder


Cylinder Displacement 135 2cc

Bore 32mm

Stroke 254mm

Complete Kit comprises of 1 x 291006 Tandem Catamaran Cylinder 1 x 291502 SeaStar Helm 1 7 1 x 282997 15m x 3 8 Hose Kit Semi rigid 4 x 293610 Nut Olive Kits 3 x 291902

SeaStar Hydraulic Oil Dual engines using single cylinder Non counter rotating applications up to 450hp total max

Counter rotating engine applications up to 600 hp total max

See Download PDF for more details

Additional information

Additional information




Price does not include shipping. Product will be shipped via Toll / Australia Post / Courier. Product can also be collected.





Shipping & Delivery
Prices do not include shipping.

Shipping quotes can be obtained by adding products to the cart and inputting your postcode.

$11.60 Brisbane Express - Postcodes 4000-4209, 4270-4299, 4500-4549, 9000-9725 up to 20kg

Boat Hut uses Toll Ipec Priority Service, Australia Post Express Post and Courier's Please. Boat Hut uses Australia Post or DHL International Service for New Zealand deliveries.

Free Local Pickup – by prior arrangement. We don’t always have all the products at our Acacia Ridge premises, but they may be at our warehouse. Warehouse collections can be arranged by prior arrangement - please contact us to discuss.

Order Tracking provided on all orders.

All orders will be processed within 2 business days - except backordered items. If we are unable to meet this timeframe we will contact you to provide details and options. If we are unable to ship your order within 3 business days we will offer you a refund in full or the option to wait for the goods to come into stock.

We are happy to ship to any country - and will provide a quote upon request. All overseas orders must be paid for via Paypal before your order is shipped.

Above pricing refers to regular size items that will fit in courier satchels - oversized items will require a freight quote.

Boat Hut reserves the right to refuse to fulfil an order that has the incorrect postage / freight collected at the time of sale. We will work with you to rectify the matter, if we are unable to come to a resolution then we will provide a refund in full.


Stock Availability

Boat Hut has approx 100,000 product lines coming from a number of warehouses across Australia.
Not all of these products are available for a walk-in purchase at Acacia Ridge - most times you will need to make arrangments in advance.
Please feel free to contact us to confirm our stock at Acacia Ridge or in our warehouses.
We try our best to keep the website up to date with current stock holdings.
We will accept back orders on out of stock items. All products are genuine & come with manufacturer's warranties.