Multiflex K3 Universal 33c Control Cable Clamp

The Multiflex K3 / LM-K-3 Universal Control Cable Clamp is a stainless-steel retaining clamp for one compatible Multiflex EEC-133 or EC-133 universal 3300 / 33C control cable. It secures the cable outer casing to a rigid support bracket so the inner cable can transmit shift or throttle movement. The K3 is the clamp component only; the control cable, support bracket, linkage fittings and installation-specific hardware are supplied separately unless expressly stated.

Product Identification

• Brand: Multiflex
• Model / item code: K3
• Manufacturer part number: LM-K-3
• Product category: Mechanical control cable clamp
• Alternative description: Universal 33C control cable retaining clamp
• Cable format: Universal 3300 / 33C
• Compatible Multiflex cable families: EEC-133 and EC-133
• Cable capacity: One control cable
• Material: Stainless steel
• Clamp construction: Fixed bolted retaining clamp
• Primary function: Secures the control cable outer casing to a support bracket
• Control applications: Gear shift or throttle
• System applications: Compatible engine and gearbox control installations
• Quick-release hook: Not shown or specified for the K3
• Multi-hole mounting base: Not shown or specified for the K3
• Separate support bracket: Required according to the installation
• Published dimensions: Not stated in the available K3 product data

What Is This Control Cable Clamp Used For?

The Multiflex K3 is used to secure the stationary outer casing of a compatible mechanical control cable to a rigid support.

Once the outer casing is held securely, the cable's inner member can move in a push-pull direction to transfer movement between the remote control and the engine or gearbox linkage.

The K3 can form part of a correctly specified:

• Gear-shift control installation
• Throttle-control installation
• Engine remote-control system
• Gearbox remote-control system
• New EEC-133 cable installation
• New EC-133 cable installation
• Replacement 3300 / 33C control cable installation
• Marine or industrial mechanical control assembly

The K3 is a cable-retaining component. It does not generate cable movement and does not replace the remote control, cable, terminal fitting or operating linkage.

What Is Included?

This listing is for:

• One Multiflex K3 / LM-K-3 universal control cable clamp

The exact loose-fastener contents are not itemised in the available product data and should be checked against the supplied package.

Not included unless expressly stated:

• EEC-133 control cable
• EC-133 control cable
• Remote shift or throttle control
• Separate structural support bracket
• Engine-side cable connection kit
• Gearbox-side cable connection kit
• Clevis
• Ball joint
• Eye end
• Threaded cable terminal
• Control lever
• A second cable clamp
• Installation-specific fasteners
• Other linkage or mounting hardware

Which Control Cables Are Compatible?

The current Multiflex K3 product data specify compatibility with:

• Multiflex EEC-133
• Multiflex EC-133

Both are universal 3300-series mechanical engine control cables used for compatible shift and throttle applications.

The EEC-133 is the Multiflex Edge low-friction cable and has:

• 90mm travel
• 8.6mm special Edge conduit
• 2.75mm coated inner
• 10-32 UNF threaded ends

The EC-133 is the standard Multiflex universal control cable and has:

• 90mm travel
• 8.4mm conduit
• 1.9mm stainless-steel solid-wire inner
• 10-32 UNF threaded ends

These measurements relate to the compatible cables rather than to the K3 clamp itself.

Is the K3 Suitable for 33C Control Cables?

The K3 is specified for the Multiflex EEC-133 and EC-133 universal 3300 cable families, which correspond to the commonly used 33C mechanical control cable format.

The term “universal” should not be interpreted as confirmation that the K3 fits every cable marketed as 33C or 3300.

Correct fitment depends on:

• Cable manufacturer
• Cable model
• Cable casing or mounting-ferrule dimensions
• Support-bracket design
• Clamp position
• Cable operating direction
• Required cable movement
• Available installation space

Confirm the physical cable-to-clamp interface before substituting a cable from another manufacturer.

Is the Multiflex EC-033 Cable Compatible?

The current official K3 listing specifically identifies:

• EEC-133
• EC-133

It does not list the EC-033.

The EC-033 has a different published conduit diameter from the EC-133:

• EC-033 conduit: 7.0mm
• EC-133 conduit: 8.4mm

This dimensional difference is another reason to confirm physical fitment rather than relying solely on the general 3300 / 33C description.

Are EC-133R and EC-043 Cables Compatible?

The available K3 product data do not specifically list:

• EC-133R
• EC-043
• EEC-043
• Other 4300-series cables
• Engine-specific control cable families

These cable types should not be described as direct K3 applications without confirmation from the current Multiflex installation information.

A separate Multiflex K4 clamp is identified for the heavier-duty EC-043 cable series. The K3 and K4 should not be treated as interchangeable solely because both are control cable clamps.

Does the K3 Include a Quick-Release Hook?

A quick-release hook is not shown or specified in the current K3 product information.

Available product images show the K3 as a compact, fixed clamp with a curved retaining section and bolted side plates. The cable is mechanically retained rather than held by a separate quick-release lever or hook.

The K3 should therefore not be listed with the following unsupported features:

• Quick-release hook
• Quick-release retaining lever
• Multi-hole mounting base
• 40 x 25mm bracket base
• Multiple selectable base-fixing positions

Those features are associated with a different single-hook 33C cable mounting bracket.

How Does the K3 Secure the Control Cable?

The K3 fits around the control cable's stationary outer section and retains it against a correctly positioned support.

The clamp must hold the cable outer securely enough to prevent unwanted movement while allowing the inner cable to travel freely.

Correct installation should provide:

• Secure retention of the cable outer
• Correct alignment with the engine or gearbox linkage
• No crushing or deformation of the cable casing
• Free movement of the cable inner
• Adequate access for inspection and adjustment
• Sufficient clearance from moving machinery
• A cable route that respects the cable's minimum bend radius

The clamp should not be tightened in a way that distorts the cable casing or increases operating friction.

Does the K3 Hold One or Two Control Cables?

The K3 is intended to retain:

• One control cable

A conventional single-engine remote control commonly uses one cable for gear shift and a second cable for throttle.

Where both cables require support, the installation may require:

• Two K3 clamps
• Separate mounting positions
• A purpose-designed twin-cable bracket
• Another correctly specified control cable support arrangement

This listing should not describe the K3 as a double-cable clamp.

Is the Support Bracket Included?

The K3 is designed to secure a control cable to a suitable support arrangement.

A separate structural support bracket is not identified as part of the standard K3 supply in the available product data.

The support must:

• Be sufficiently rigid
• Resist movement during push-pull cable operation
• Maintain correct cable alignment
• Provide suitable fixing points
• Allow access to the clamp fasteners
• Prevent contact with hot or moving components
• Be appropriate for the marine or mechanical environment

Do not mount the K3 to an unsupported or flexible panel that can move during control operation.

Is the K3 a Cable-End Linkage Fitting?

No. The K3 secures the stationary outer casing of the control cable.

It does not connect the moving threaded cable end to the:

• Gear selector
• Throttle arm
• Engine linkage
• Gearbox linkage
• Remote-control lever
• Carburettor linkage
• Fuel-control mechanism

A separate connection component may be required, such as:

• Ball joint
• Clevis
• Eye end
• Pivot
• Threaded adaptor
• Engine-specific connection kit

The EEC-133 and EC-133 cable ends use a 10-32 UNF thread, but that thread specification applies to the cable linkage end rather than to the K3 clamp.

Construction and Design

• Multiflex K3 universal control cable clamp
• Extended part reference LM-K-3
• Stainless-steel construction
• Compact fixed clamp design
• Curved cable-retaining section
• Bolted side-plate construction
• Holds one compatible control cable
• Suitable for EEC-133 cables
• Suitable for EC-133 cables
• Designed for universal 3300 / 33C control cable installations
• Secures the stationary cable outer casing
• Allows the cable inner to transfer push-pull movement
• Suitable for compatible shift or throttle control systems
• Requires a rigid support or mounting arrangement
• No electrical components
• No quick-release hook shown or specified
• No multi-hole mounting base shown or specified
• No published product dimensions
• No published maximum operating load

Installation and Safety

Before installing the Multiflex K3:

• Confirm that the product is the K3 / LM-K-3 clamp
• Do not confuse it with an L31-style quick-release mounting bracket
• Confirm that the control cable is an EEC-133 or EC-133 series cable
• Physically verify any unlisted cable before installation
• Check that the clamp fits the cable casing correctly
• Use a rigid and correctly positioned support bracket
• Confirm that the support can resist the cable's operating forces
• Align the cable with the remote control, engine or gearbox linkage
• Do not force the cable into a misaligned mounting position
• Do not crush or deform the cable casing
• Tighten the clamp fasteners evenly
• Use suitable corrosion-resistant installation fasteners
• Secure all nuts and bolts against loosening
• Maintain the minimum bend radius specified for the selected cable
• Keep the cable route as straight and gradual as possible
• Avoid sharp bends, kinks and twisting
• Keep the cable away from exhaust components and excessive heat
• Protect the cable from sharp edges and abrasive surfaces
• Keep the cable clear of belts, pulleys and other moving machinery
• Confirm that the cable inner moves freely after clamping
• Check that the control returns fully to idle
• Verify positive forward, neutral and reverse engagement where used for shifting
• Inspect the clamp and support bracket regularly
• Replace the clamp if it is bent, cracked, loose or excessively corroded
• Do not operate the control system if the cable binds or has excessive free movement

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

Key Features

• Multiflex K3 universal control cable clamp
• Manufacturer reference LM-K-3
• Designed for compatible mechanical control cables
• Officially listed for Multiflex EEC-133 cables
• Officially listed for Multiflex EC-133 cables
• Suitable for universal 3300 / 33C cable installations
• Suitable for compatible shift-control systems
• Suitable for compatible throttle-control systems
• Holds one control cable
• Secures the cable outer casing
• Allows the cable inner to transfer push-pull movement
• Stainless-steel construction
• Compact fixed clamp design
• Bolted retaining construction
• Suitable for engine or gearbox control installations
• Requires a rigid support bracket
• Control cable supplied separately
• Cable-end linkage fittings supplied separately
• Support bracket not identified as included
• Exact loose-fastener contents not stated
• EC-033 compatibility not confirmed by the current official K3 page
• EC-133R compatibility not stated
• Quick-release hook not shown or specified
• Multi-hole mounting base not shown or specified
• 40 x 25mm L31 bracket dimensions do not apply
• K3 dimensions are not published in the available product data
• Stainless-steel grade is not stated
• Maximum operating load is not stated