Ultraflex SilverSteer UC130-SVS front-mount hydraulic steering cylinder for outboard motors in model UC130-SVS/2 is a balanced starboard version with a version 2 connection arm. The cylinder is developed for outboard motors with high engine power and high steering loads. The product is the steering cylinder itself and not a complete hydraulic steering system with pump, hoses, and oil.
The balanced design provides the same number of wheel turns from lock to lock in both directions. The cylinder features side-mounted, adjustable hydraulic connections, replaceable cylinder end caps, and a high-strength stainless steel ULTRABOLT connection bolt. The cylinder rod and connection units are also made of stainless steel.
The UC130-SVS/2 has a stroke of 185 mm, a cylinder volume of 130 cm³, and an internal cylinder diameter of 36 mm. The total length is 544 mm, and the height is 76.2 mm. The connection for high-pressure hoses is 3/8″ / 9.5 mm, while bleeding is performed through DN5 quick-connect couplings. The thrust force is 492 kg.
The cylinder is mounted on the outboard motor's tilt tube. The correct connection arm, spacers, and installation space must be checked for the specific engine. The hydraulic hoses are tightened onto the cylinder fittings with 20 Nm and must be installed with a bend radius of at least 250 mm so that they are not pinched or affected when the engine is steered and tilted. Ultraflex OL150 hydraulic oil is recommended; ATF Dexron II and brake fluid must not be used.
Compatible engine models
Evinrude: E115, E130, and E135 V4 2-stroke from 1995 as well as E150, E175, E200, E225, E250, and E300 V6 2-stroke from 1995.
Yamaha: 150F, 200F, and 250G 2-stroke from 1990-2008; 150 HPDI VMAX from 1996-2007; 175, 200, 225, 250, and 300 HPDI VMAX from 2000-2008; F200, F225, and F250 4-stroke from 1999-2007; F200, F225, F250, and F300 V6 4-stroke from 2004.
Suzuki: DF200, DF225, DF250, DF300, and DF350 V6 4-stroke from 2004.
Tohatsu: 115, 120, and 140 2-stroke from 2004.
Selva: 150 White Shark 2-stroke from 2001-2007 and 225 Beaked Whale 4-stroke from 2019.
Johnson: J90 and J115 V4 2-stroke from 1995-2007; J150 and J175 V6 2-stroke from 1995-2007; J200 and J225 V6 4-stroke from 2004-2007.
Cox: 300-350 HP diesel from 2020.
Parsun: F300 from 2022.
SilverSteer configurations with one engine and one cylinder can be used up to 350 HP. Twin-engine installations can, depending on the engine rotation direction and the number of cylinders, be configured up to 700 HP. The system is not intended for racing and is generally not recommended for boats exceeding 60 knots. For twin-engine, dual-cylinder, and counter-rotating engines, the limit is 65 knots.
System components and spare parts
The cylinder is used together with a SilverSteer pump and the corresponding high-pressure hoses. Relevant pumps include item no. 45.275.01, 45.275.11, 45.275.02, 45.275.12, 45.275.03, and 45.275.13; the pump is selected based on engine power, number of engines, and the desired number of wheel turns. KIT OB-SVS consists of two Kevlar-reinforced high-pressure hoses with pre-pressed fittings.
For twin-engine installation with two cylinders, UC130P-SVS/2 (item no. 45.276.09) is used as the opposite cylinder together with a suitable A95 tie-bar. Product-specific service parts include seal kit 43364J, tool kit 43386V, and connection kit 42081R with ULTRABOLT. Service and replacement of cylinder parts must be performed by a qualified technician.
Always check the engine model, year, installation space, connection arm, and manufacturer number before purchase.
Key featuresBalanced, front-mount hydraulic steering cylinder
UC130-SVS/2 starboard version with version 2 connection arm
185 mm stroke and 130 cm³ cylinder volume
492 kg thrust force
3/8″ / 9.5 mm high-pressure connections
Side-mounted, adjustable hydraulic connections
High-strength stainless steel ULTRABOLT
Replaceable cylinder end caps
Manufacturer number 43226W
