Ultraflex M58 Light Duty Steering Cable

The Ultraflex M58 is a light-duty mechanical steering cable for compatible powerboats with outboard engines from 15 to 55HP. It is designed for the Ultraflex T67 and listed Morse, Teleflex and Multiflex rotary steering helms without an adaptor. The cable uses a 7/8in UNF connection nut, provides a 230mm / 9in stroke and is supplied in one-foot length increments.

Product Identification

• Brand: Ultraflex
• Model: M58
• Product category: Mechanical marine steering cable
• Steering system type: Light-duty single-cable rotary steering
• Engine application: Outboard engines from 15 to 55HP
• Primary Ultraflex helm: T67
• Connection nut thread: 7/8in UNF
• Adaptor required: None for the listed compatible helms
• Cable stroke: 230mm / 9in
• Minimum bend radius: 200mm / 7.9in
• Length increments: 1ft

What Is This Steering Cable Used For?

The Ultraflex M58 transfers steering-wheel movement from a compatible mechanical rotary helm to the boat's outboard steering assembly. It is designed as the steering-cable component for the Ultraflex T67 steering helm.

The M58 can be used for a compatible new installation or as a replacement after the helm connection, engine connection, cable stroke and required length have been confirmed.

The maximum engine rating is determined by the complete steering system rather than the cable alone. The helm, cable, engine connection and boat must remain within their individual manufacturer ratings.

What Is Included?

The Ultraflex M58 is supplied as:

• One light-duty mechanical steering cable
• Selected cable length
• Stainless steel cable output end
• 7/8in UNF connection nut

Not included:

• Mechanical steering helm
• Dashboard bezel
• Steering wheel
• Other steering-system components

Which Steering Helms Are Compatible?

The Ultraflex M58 is listed for use with the following mechanical rotary steering helms:

• Ultraflex T67
• Morse C230
• Morse C231
• Teleflex Compac-T
• Teleflex 805 TX
• Multiflex H2 Lite 55

No adaptor is required when connecting the M58 to the listed compatible helms.

Confirm the existing helm model, cable interface and thread before ordering. Similar-looking mechanical steering cables are not automatically interchangeable.

Is the M58 Equivalent to Multiflex SC-18 or SSC131?

The supplied cross-reference information links the Ultraflex M58 cable family with:

• Multiflex SC-18 / Lite 55
• SeaStar Solutions SSC131

Cross-references should be used as a cable-selection guide rather than confirmation of automatic compatibility. Check the helm-side connection, engine-side fitting, cable travel, cable routing and required length before installation.

Does the Ultraflex M58 Need an Adaptor?

No adaptor is required for the listed Ultraflex, Morse, Teleflex and Multiflex rotary steering helms.

The cable connects using a 7/8in UNF threaded nut. Confirm that the existing helm has the correct cable interface and thread before removing or ordering the replacement cable.

Which Length Options Are Available?

The M58 is supplied in one-foot length increments so the cable can be selected according to the boat's steering route.

The supplied source does not state the minimum and maximum M58 lengths covered by this listing. Confirm the available length range and the corresponding order code before publishing or placing an order.

How Do You Measure an M58 Replacement Steering Cable?

1. Measure the length of the black outer cable jacket marked D in the measuring diagram.
2. Do not include the exposed steering rod, threaded nut or metal end fittings.
3. Add 2ft, approximately 610mm, to the measured jacket length.
4. Select the corresponding M58 cable length in feet.
5. When the calculated measurement falls between available sizes, select the next longer whole-foot cable.

Replacement cable formula: Required M58 cable length = D + 2ft.

Example: If the outer cable jacket measures 10ft, add 2ft and select a 12ft Ultraflex M58 steering cable.

The D + 2ft method applies when replacing an existing cable. A new steering installation must be measured according to the complete planned cable route through the boat.

Construction and Design

• Light-duty single-cable mechanical steering construction
• 7/8in UNF helm connection nut
• Stainless steel cable output end
• 230mm / 9in cable stroke
• 200mm / 7.9in minimum bend radius
• One-foot length increments
• Cable output end manufactured in accordance with ABYC P17
• Complete T67/M58 steering system exceeds EN 29775 requirements

Installation and Use

Select the correct cable length before removing the existing steering cable. A cable that is too short can create excessive tension or bends below the permitted radius, while an unnecessarily long cable can add unwanted bends and increase steering resistance.

During installation:

• Maintain a minimum bend radius of 200mm / 7.9in
• Avoid sharp bends, kinks, crushed sections and unsupported cable runs
• Route the cable away from excessive heat and moving engine components
• Check that the cable moves freely through the helm's complete steering range
• Confirm that the engine reaches full steering travel in both directions
• Verify that the 7/8in UNF connection nut is correctly engaged and retained
• Never exceed the lowest horsepower rating specified for the boat or any steering-system component

The T67/M58 system is not recommended for the Evinrude E-TEC 50. The supplied product information identifies the Ultraflex T85, T71FC or T91 as the recommended alternatives for that engine.

Marine steering is a safety-critical system. Installation and servicing should follow the current Ultraflex instructions and be completed by suitably competent personnel.

Key Features

• Ultraflex M58 light-duty mechanical steering cable
• Suitable for compatible outboard installations from 15 to 55HP
• Designed for the Ultraflex T67 rotary steering helm
• Compatible with selected Morse, Teleflex and Multiflex helms
• No adaptor required for the listed compatible helms
• 7/8in UNF threaded connection nut
• Stainless steel cable output end
• 230mm / 9in cable stroke
• Minimum bend radius of 200mm / 7.9in
• Available in one-foot length increments
• Cable output end manufactured in accordance with ABYC P17
• Complete T67/M58 system exceeds EN 29775 requirements
• Replacement measurement calculated as jacket length D plus 2ft
• Steering helm, bezel and steering wheel supplied separately