Ultraflex L31 Stainless Steel Universal Quick Release 33c Control Cable Clamp

The Ultraflex L31 Stainless Steel Universal Control Cable Clamp is designed to secure one compatible 33C-series engine or gearbox control cable to a rigid support bracket. It features a quick-release retaining hook, a multi-hole mounting base and a compact 40 x 25mm base size, allowing the cable position to be selected according to the installation layout.

Product Identification

• Brand: Ultraflex
• Model: L31
• Product code: 4-L31
• Manufacturer SKU: 036174M
• Product category: Marine control cable mounting clamp
• Alternative description: Universal control cable bracket
• Cable format: 33C series
• Cable capacity: One control cable
• Clamp type: Quick clamp
• Release feature: Quick-release hook
• Mounting design: Multi-hole fixing
• Base dimensions: 40 x 25mm
• Material: Stainless steel
• Application: Engine and gearbox control cable support

What Is This Control Cable Clamp Used For?

The Ultraflex L31 is used to secure the outer casing of a compatible mechanical control cable to a fixed support.

Holding the cable casing securely allows the inner cable to move and transfer push-pull movement between the remote control and the engine or gearbox mechanism.

The L31 can be used as part of a correctly specified:

• Throttle-control installation
• Gear-shift control installation
• Engine remote-control system
• Gearbox remote-control system
• New 33C-series cable installation
• Replacement installation using a compatible cable and mounting arrangement

The clamp is a cable-support component. It does not replace the remote control, the cable itself or the engine-side terminal connection.

What Is Included?

This listing is for:

• One Ultraflex L31 / 4-L31 universal control cable mounting clamp
• Integrated quick-release cable-retaining hook
• Multi-hole mounting base

Not identified as included unless expressly stated:

• 33C control cable
• Remote throttle or gear control
• Engine-side cable connection fitting
• Gearbox-side cable connection fitting
• Clevis, ball joint or threaded terminal
• Separate structural support bracket
• Installation-specific mounting fasteners
• A second control cable clamp
• Other engine or gearbox connection hardware

The available product information does not provide a complete itemised fastener list, so mounting screws, bolts, washers and nuts should not be represented as included without checking the supplied package.

Which Control Cables Are Compatible?

The Ultraflex L31 is specified for:

• 33C-series mechanical control cables

It is commonly described as a universal or Morse-type control cable bracket. Correct fitment still depends on the physical cable casing and clamp interface.

Before ordering, confirm:

• Cable series
• Cable outer-casing or ferrule dimensions
• Required mounting position
• Cable operating direction
• Available bracket space
• Cable bend-radius requirements
• Alignment with the remote control or engine linkage

Compatibility with the 33C format does not automatically confirm compatibility with every engine, gearbox or remote-control assembly.

Is the L31 the Ultraflex Equivalent of the Multiflex K17?

Yes, the L31 is the closest Ultraflex functional equivalent to the:

• Multiflex K17
• SeaStar / Teleflex TX036174 single-hook bracket

The K17 and L31-style products perform the same general task: securing one compatible universal control cable with a quick-release locking hook.

The K17 should still be described as a functional equivalent rather than a confirmed dimensional cross-reference because Multiflex does not publish:

• An official Ultraflex L31 cross-reference
• Overall K17 dimensions
• Mounting-hole diameters
• Mounting-hole centres
• Base dimensions
• Bracket height

Confirm the existing mounting holes and available installation space before replacing an K17 or SeaStar bracket with a L31.

How Does the Quick-Release Hook Work?

The L31 includes a quick-release hook designed to retain the control cable within the mounting clamp.

This arrangement is intended to simplify:

• Initial cable installation
• Cable positioning
• Cable removal
• Inspection and maintenance
• Replacement of a compatible control cable

The hook must be fully engaged before operating the control system. The cable should not be used where the hook, bracket or retaining surfaces are bent, worn or unable to secure the cable correctly.

What Is the Purpose of the Multi-Hole Base?

The mounting bracket contains multiple fixing holes to provide a choice of mounting positions.

This allows the installer to select a position that provides:

• Suitable cable alignment
• Adequate clearance
• Access to the retaining hook
• A secure attachment to the support bracket
• An appropriate route toward the control or engine connection

The mounting holes do not remove the need for a rigid support. The L31 should be attached to a bracket or structure capable of resisting the push-pull forces generated by the control cable.

What Are the Base Dimensions?

• Length: 40mm
• Width: 25mm
• Base size: 40 x 25mm

The supplied product information does not state:

• Overall clamp height
• Individual mounting-hole diameter
• Mounting-hole centres
• Stainless-steel grade
• Maximum clamping force
• Maximum operating load

Check the physical product or current installation drawing where these measurements are required before drilling the support bracket.

Does the L31 Hold One or Two Control Cables?

The Ultraflex L31 is designed to hold:

• One control cable

A typical single-engine mechanical remote control may require separate shift and throttle cables. Where two cables require separate support, two correctly positioned single clamps or a suitable twin-cable mounting arrangement may be required.

This listing should not be described as a twin control cable clamp.

Is the Structural Support Bracket Included?

The L31 is designed to mount the control cable to a secure support bracket.

The supplied product description does not confirm that a separate structural support bracket is included. The L31 should therefore be listed as the cable clamp and mounting base only unless the exact package states otherwise.

The installer must provide or identify a suitable support that:

• Is sufficiently rigid
• Allows correct cable alignment
• Provides suitable fixing points
• Does not flex during control operation
• Maintains adequate clearance from moving components
• Is suitable for the marine installation environment

Is the L31 an Engine-Side Cable End Fitting?

No. The L31 secures the cable casing to a support bracket.

It does not replace the component that connects the moving inner cable to the:

• Throttle lever
• Gear-shift lever
• Gearbox selector
• Engine linkage
• Remote control mechanism

A separate clevis, ball joint, threaded adaptor or engine-specific terminal may be required according to the control system.

Construction and Design

• Stainless-steel construction
• Universal single-cable mounting design
• Suitable for compatible 33C-series control cables
• Designed for engine and gearbox control cable installations
• Quick-release retaining hook
• Multi-hole mounting base
• Compact 40 x 25mm base
• Holds one control cable
• Designed to secure the cable casing to a rigid support
• Allows a choice of mounting position
• No electrical components
• No cable travel specification because the clamp does not generate cable movement
• Stainless-steel grade not stated in the supplied product information
• Maximum operating load not stated

Installation and Safety

Before installing the Ultraflex L31:

• Confirm that the control cable is a compatible 33C-series cable
• Check that the cable casing fits securely within the clamp
• Mount the clamp to a rigid support bracket
• Select mounting holes that provide correct cable alignment
• Use suitable corrosion-resistant mounting fasteners
• Do not mount the clamp to a flexible or unsupported panel
• Do not crush or deform the cable casing
• Ensure the quick-release hook is fully engaged
• Confirm that the hook cannot release during control movement
• Avoid side loading at the cable clamp
• Maintain the minimum bend radius specified for the control cable
• Keep bends as large and gradual as the installation permits
• Keep the cable away from exhaust components and excessive heat
• Protect the cable from sharp edges and abrasive contact
• Keep the cable clear of belts, pulleys and other moving machinery
• Check that the inner cable moves freely after the clamp is secured
• Test the control through its complete operating range
• Confirm positive forward, neutral and reverse selection where used for shifting
• Confirm that the throttle returns fully to idle
• Inspect the clamp, hook and support bracket regularly
• Replace the clamp if it is bent, cracked, excessively corroded or unable to retain the cable

Engine shift and throttle controls are safety-critical systems. Installation and adjustment should be completed according to the current Ultraflex, engine, gearbox and remote-control instructions by a competent marine technician.

Key Features

• Ultraflex L31 universal control cable clamp
• Product code 4-L31
• Manufacturer SKU 036174M
• Corrected from the supplied L3 identification
• Stainless-steel construction
• Designed for compatible 33C-series control cables
• Suitable for engine and gearbox control cable support
• Holds one control cable
• Quick-release retaining hook
• Multi-hole mounting base
• Choice of mounting positions
• Compact 40 x 25mm base
• Secures the cable casing to a rigid support bracket
• Suitable for compatible shift or throttle cable installations
• Control cable supplied separately
• Engine and gearbox linkage fittings supplied separately
• Structural support bracket not confirmed as included
• Installation fasteners not confirmed as included
• Stainless-steel grade not stated
• Maximum operating load not stated