Multiflex S1 Splashwell Steering Cable Mounting Kit

The Multiflex S1 Splashwell Mounting Kit supports a compatible mechanical steering cable where a standard engine tilt tube or transom support bracket cannot be used because of the boat's splashwell layout. It uses stainless-steel mounting plates, a threaded aluminium support tube and a ball-type articulated mounting arrangement. The assembly measures approximately 280mm / 11in long with an 89.9mm / 3.53in mounting plate diameter. Product Identification Brand: Multiflex Model / item code: S1 Product category: Mechanical steering system accessory Product type: Splashwell steering cable mounting kit Primary function: Supports a mechanical steering cable at the splashwell Suitable installation: Boats where a splashwell box prevents standard tilt-tube or transom-support mounting Alternative suitable installation: Boats without a suitable engine tilt tube Mounting plate material: Stainless steel Support tube material: Aluminium Support tube design: Threaded Published assembly length: 280mm / 11in Published mounting plate diameter: 89.9mm / 3.53in Mounting surface orientation: Normally perpendicular to the transom Manufacturer-stated mounting position: 12-16in from the boat centreline and/or tiller Approximate metric mounting position: 305-406mm from the centreline and/or tiller Manufacturer-stated total splashwell width: 25-33in Approximate metric splashwell width: 635-838mm Dometic / SeaStar cross-reference: SA27253P Ultraflex cross-references: S40 and S55 Steering system type: Mechanical cable steering Hydraulic steering component: No Multiflex describes the S1 as a replacement for the ball-post and splashwell mounting assembly used in steering connection kits. What Is a Splashwell Mounting Kit Used For? The Multiflex S1 provides a fixed support and pivot point for the outer section of a compatible mechanical steering cable. Holding the cable support securely allows the cable's moving inner output member to transfer steering movement to the outboard engine through a separately selected steering link arm. The S1 can form part of a correctly specified: Outboard mechanical steering installation Splashwell-mounted steering arrangement New steering installation without a usable engine tilt tube Replacement of a compatible splashwell mounting assembly Installation where a splashwell box prevents a conventional transom support bracket Steering connection kit requiring a replacement ball-post and support-tube assembly The S1 supports the steering cable; it does not generate steering movement and does not replace the steering helm, steering cable or engine link arm. When Is the S1 Splashwell Mount Required? The S1 is intended for boats where the normal steering-cable mounting options are unavailable or obstructed. Typical reasons for selecting the S1 include: The outboard engine has no suitable steering tilt tube The engine tilt tube cannot be used for the selected steering arrangement A splashwell box obstructs a standard transom support bracket The steering cable must be supported from a surface perpendicular to the transom The cable requires a ball-type mounting point that permits angular movement An existing compatible splashwell mounting assembly requires replacement Multiflex states that the mounting surface is usually perpendicular to the transom and positioned between 12in and 16in from the centreline of the boat and/or tiller. The stated corresponding total splashwell width is 25-33in. What Is Included? The official S1 installation manual identifies the following kit contents: 1 x threaded aluminium support tube 2 x clamp bend plates 1 x clamp plate 1 x plastic ball 1 x plastic cap 4 x M6 stainless-steel hex bolts 4 x M6 Nyloc nuts 4 x M6 stainless-steel washers Not included unless expressly stated: Mechanical steering cable Steering helm Steering wheel Dashboard bezel Engine steering link arm Engine tiller arm Steering cable-to-engine connection hardware Engine-specific adaptor Transom clamp block Hydraulic steering cylinder Additional structural mounting hardware beyond the listed M6 components Other installation-specific steering parts What Are the Published Product Dimensions? Overall assembly length: 280mm / 11in Mounting plate outside diameter: 89.9mm / 3.53in The available manufacturer data do not state: Individual plate thickness Support-tube outside diameter Support-tube inside diameter Thread diameter Thread pitch Mounting-hole diameter Mounting-hole pitch-circle diameter Distance between individual M6 holes Maximum articulation angle Product weight Maximum steering load Maximum engine horsepower Where these dimensions are critical, check the physical S1 kit or a current Multiflex technical drawing before drilling the boat. What Does the 12-16in Mounting Position Mean? Manufacturer-stated position: 12-16in from the centreline of the boat and/or tiller Approximate metric position: 305-406mm Manufacturer-stated total splashwell width: 25-33in Approximate metric splashwell width: 635-838mm This is the manufacturer's usual installation geometry, not a guarantee that the S1 will fit every boat within those dimensions. The mounting position must also provide correct cable alignment, steering travel and clearance throughout the engine's steering and tilt range. How Is the S1 Installed? The steering cable is prepared and passed into the threaded aluminium support-tube assembly. The stainless-steel plate assembly and plastic ball are positioned through the splashwell mounting surface. The plate assembly is secured using the supplied M6 bolts, washers and Nyloc nuts. The moving steering-cable end is connected to the outboard engine through a suitable link arm. The completed installation is checked for correct alignment and unrestricted engine movement. The exact drilling procedure, tightening torque and cable adjustment values are not stated in the visible manual text. Use the current Multiflex instructions and the requirements of the steering cable and engine. What Does the Plastic Ball Do? The S1 includes a plastic ball within the mounting plate assembly. This ball-type arrangement allows the support tube and steering cable to align with the engine connection while the plates secure the assembly to the splashwell surface. The articulated mounting arrangement is intended to: Support the steering cable outer assembly Permit the required cable approach angle Reduce unwanted side loading Allow alignment with the engine tiller Maintain a secure mounting point through the splashwell wall Which Steering Cables Are Compatible? The current S1 product data do not identify a specific Multiflex steering-cable model. The selected cable must have a support and output arrangement compatible with: The S1 threaded aluminium support tube The ball-type splashwell mount The selected steering helm The engine link arm The required steering travel The available installation space Before ordering, confirm: Steering-cable manufacturer Steering-cable model Cable output-end design Support-tube or threaded mounting interface Cable travel Cable length Minimum bend radius Engine connection Required link arm Maximum steering-system rating Is the S1 Compatible with Dometic / SeaStar SA27253P? Multiflex lists the S1 as compatible with: Dometic / SeaStar SA27253P Multiflex states that its cross-reference information is supplied for reference and that users must confirm interchangeability before installation. Before replacing an SA27253P assembly, compare: Support-tube dimensions Plate diameter Mounting-hole positions Threaded connection Ball and plate geometry Steering-cable fit Available steering travel Splashwell wall thickness Engine link-arm arrangement Which Ultraflex Parts Cross-Reference to the S1? Multiflex lists the following Ultraflex references for the S1: Ultraflex S40 Ultraflex S55 The references are selection guidance. Confirm the exact existing model, steering-cable type, support-tube dimensions, mounting-hole pattern and engine connection before installation. Do the Cross-References Guarantee Direct Fitment? No. Direct replacement depends on: Boat structure Splashwell width Mounting-surface position Mounting-hole arrangement Wall thickness Steering-cable interface Cable travel Engine tiller geometry Link-arm dimensions Steering and tilt clearances Do not drill new mounting holes or reuse an existing hole pattern until the physical S1 assembly has been checked against the boat. Does the S1 Replace an Engine Tilt Tube? The S1 provides an alternative cable-support arrangement where a usable engine tilt tube is unavailable. It should not be described as a universal tilt-tube replacement for every outboard engine. Correct installation still depends on: A structurally suitable splashwell surface Correct distance from the engine tiller Compatible steering-cable travel Correct cable alignment A suitable link arm Clearance through the full steering range Clearance through the full engine tilt range Does the S1 Replace a Transom Clamp Block? The S1 is used where a standard transom support mounting arrangement is prevented by the splashwell box or installation layout. It performs the steering-cable support function through a splashwell mounting surface rather than through a conventional transom-mounted clamp-block arrangement. Does the S1 Include a Steering Link Arm? No steering link arm is listed in the S1 kit contents. The correct link arm must be selected according to: Steering-cable output end Outboard engine make and model Engine tiller mounting point Required arm length and offset Mounting-bolt diameter Steering travel Engine tilt clearance Can the S1 Be Used for Inboard Steering? The S1 is specifically described and illustrated as a splashwell mounting kit for an outboard mechanical steering installation. The available manufacturer data do not identify it as an inboard rudder mounting bracket. Can the S1 Be Used with Hydraulic Steering? The S1 is a mechanical steering system accessory designed to support a mechanical steering cable. It is not identified as: A hydraulic cylinder mount A hydraulic helm component A hydraulic hose bulkhead fitting A hydraulic tie bar A hydraulic engine bracket A hydraulic steering adaptor Is the S1 a Complete Steering System? No. The Multiflex S1 is the splashwell cable-support assembly only. A complete mechanical steering system may also require: Steering wheel Steering helm Dashboard bezel Correctly measured mechanical steering cable S1 splashwell mounting kit Compatible steering link arm Engine tiller connection Engine-specific mounting hardware Suitable splashwell structure Correct steering and tilt clearance Construction and Design Multiflex mechanical steering accessory Item code S1 Splashwell steering cable mounting design Intended for outboard mechanical steering installations Used where a normal engine tilt tube is unavailable Used where a splashwell box prevents standard transom-support mounting Stainless-steel mounting plate assembly Threaded aluminium support tube Plastic articulation ball Plastic end cap Two clamp bend plates One clamp plate Four M6 stainless-steel hex bolts Four M6 stainless-steel washers Four M6 Nyloc nuts 280mm / 11in published overall assembly length 89.9mm / 3.53in published mounting plate diameter Mounting surface normally perpendicular to the transom Usual position 12-16in from the centreline and/or tiller Manufacturer-stated total splashwell width of 25-33in No electrical components No hydraulic components No steering cable included No steering helm included No engine link arm included Maximum steering load not published Maximum engine horsepower not published Installation and Safety Before installing the Multiflex S1: Confirm that the boat requires a splashwell-mounted steering-cable support Verify that the engine has no suitable tilt-tube mounting arrangement Confirm that a standard transom support bracket cannot be used Check that the splashwell mounting surface is structurally suitable Confirm that the intended surface is correctly positioned relative to the engine tiller Check the manufacturer's 12-16in centreline guidance Confirm that the steering cable is compatible with the S1 support tube Verify the steering cable's required length and travel Maintain the cable manufacturer's minimum bend radius Confirm compatibility with the selected engine link arm Check the 89.9mm mounting plate clearance before drilling Check the 280mm assembly length against the available space Use the supplied M6 stainless-steel bolts, washers and Nyloc nuts correctly Ensure the plastic ball is seated correctly between the plate components Tighten the mounting hardware evenly Do not distort the stainless-steel plates or splashwell surface Do not clamp the steering cable tightly enough to restrict its movement Align the cable without excessive side loading Ensure the plastic cap is installed correctly Connect the cable output to the engine using the correct link arm Turn the steering fully from port to starboard Confirm that the cable moves freely throughout its travel Check that the engine reaches both steering locks without binding Tilt the engine fully upward and downward Repeat the steering-clearance check throughout the tilt range Ensure the support tube, cable and link arm do not contact the transom or splashwell Recheck the M6 fasteners after the initial steering test Inspect the plates, tube, plastic ball and fasteners regularly Replace any bent, cracked, loose or excessively corroded component Do not operate the boat if the steering cable or mounting assembly binds Do not exceed the rating of the lowest-rated steering component Marine steering is safety-critical. Installation should be completed according to the current Multiflex, steering-cable, engine and boat instructions by a competent marine technician. Key Features Multiflex S1 splashwell mounting kit Designed for compatible mechanical steering cables Supports the steering cable at the boat's splashwell Intended for boats without a usable engine tilt tube Suitable where a splashwell box prevents standard transom-support mounting Stainless-steel mounting plates Threaded aluminium support tube Plastic ball provides an articulated mounting arrangement Plastic protective cap 280mm / 11in published overall length 89.9mm / 3.53in mounting plate diameter Four M6 stainless-steel mounting bolts included Four M6 stainless-steel washers included Four M6 Nyloc nuts included Manufacturer mounting guidance of 12-16in from the centreline and/or tiller Intended for a stated total splashwell width of 25-33in Cross-referenced to Dometic / SeaStar SA27253P Cross-referenced to Ultraflex S40 and S55 Cross-references require fitment verification Replacement for a compatible ball-post and splashwell mounting assembly Steering cable supplied separately Steering helm supplied separately Steering wheel supplied separately Engine link arm supplied separately No specific steering-cable model published No maximum horsepower rating published Mounting geometry must be confirmed before drilling Specification S1 Brand Multiflex Model / Item Code S1 Product Category Mechanical Steering System Accessory Product Type Splashwell Steering Cable Mounting Kit Primary Function Supports a Mechanical Steering Cable at the Splashwell Steering System Type Mechanical Cable Steering Primary Application Outboard Splashwell Mounting Suitable Where Engine Tilt Tube Is Unavailable Yes Suitable Where Splashwell Prevents Transom Support Mounting Yes Mounting Surface Orientation Normally Perpendicular to the Transom Manufacturer-Stated Centreline Distance 12-16in / Approximately 305-406mm Manufacturer-Stated Total Splashwell Width 25-33in / Approximately 635-838mm Published Overall Assembly Length 280mm / 11in Published Mounting Plate Diameter 89.9mm / 3.53in Mounting Plate Material Stainless Steel Support Tube Material Aluminium Support Tube Design Threaded Aluminium Support Tube Threaded Aluminium Support Tube 1 Included Clamp Bend Plates 2 Included Clamp Plate 1 Included Articulation Ball 1 Plastic Ball Included Protective Cap 1 Plastic Cap Included Mounting Bolts 4 x M6 Stainless-Steel Hex Bolts Included Mounting Nuts 4 x M6 Nyloc Nuts Included Mounting Washers 4 x M6 Stainless-Steel Washers Included Replacement Function Ball-Post and Splashwell Mounting Assembly in Compatible Steering Connection Kits Dometic / SeaStar Cross-Reference SA27253P Ultraflex Cross-Reference S40 / S55 Cross-Reference Status Reference Only; Confirm Interchangeability Before Installation Specific Multiflex Steering Cable Not Stated in Current Product Data Steering Cable Included No Steering Helm Included No Steering Wheel Included No Engine Link Arm Included No Hydraulic Steering Component No Support Tube Outside Diameter Not Stated Thread Diameter and Pitch Not Stated Mounting-Hole Diameter Not Stated Mounting-Hole Spacing Not Stated Maximum Articulation Angle Not Stated Maximum Steering Load Not Stated Maximum Engine Horsepower Not Stated Direct-Fit Confirmation Confirm Cable Interface, Splashwell Geometry, Mounting Position, Link Arm and Steering Clearance