Ultraflex C8 33C Universal Engine Control Cable

The Ultraflex C8 is a universal 33C-style mechanical engine control cable for compatible outboard, inboard and sterndrive throttle or shift systems. It has an 87mm / 3.4in stroke, standard 10-32 UNF threaded rod ends, an approximately 8mm rod and stainless-steel end fittings. Choose from the listed 3ft to 35ft variants.

Product Identification

• Brand: Ultraflex
• Product range: Standard universal control cables
• Product category: Universal 33C-style mechanical marine engine control cable
• Model: C8
• Current Shopify title: Ultraflex C8 Mid Duty 33C Control Cable
• Store SKU format: AF-4-C8-XX
• Cable style: Universal 33C style with 10-32 UNF threaded rod ends
• Stroke: 87mm / 3.4in
• Available listing lengths: 3ft to 35ft; see exact options below
• Primary application: Compatible outboard, inboard and sterndrive throttle or shift systems
• Official Multiflex cross-reference: EC-133
• Multiflex SKU format: EC-133-XX
• Threaded rod ends: 10-32 UNF
• Rod diameter: Approximately 8mm
• Minimum bend radius: 200mm / 8in in the supplied product data
• End fittings: Stainless steel

What Is This Control Cable Used For?

The C8 transfers push-pull movement between a mechanical engine control and the throttle, gearbox or shift linkage.

• Compatible universal 33C-style throttle systems
• Compatible universal 33C-style shift systems
• Outboard applications using the appropriate control and engine accessories
• Inboard and sterndrive installations
• Replacement of an existing C8 cable with matching terminals, stroke and length

A single cable normally operates one function. Installations with separate throttle and shift mechanisms generally require two cables.

What Is Included?

The selected Ultraflex C8 cable is supplied with:

• One Ultraflex C8 mechanical engine control cable in the selected length
• Integral cable terminals and end fittings supplied as part of the cable assembly

Not included:

• Mechanical engine control box
• A second cable where separate throttle and shift cables are required
• Control-box connection kit unless expressly stated as part of a separate package
• Engine-side clevises, pivots, clamps or adaptors not integral to the selected cable
• Installation labour and boat-specific mounting hardware

Which Engines and Controls Are Compatible?

Ultraflex specifies the C8 for inboard, sterndrive and outboard engines with the appropriate accessories. Before ordering, confirm:

• The control and engine linkage accept 10-32 UNF threaded rod ends
• The application requires an 87mm / 3.4in stroke
• The selected length reaches the engine or gearbox connection along the complete installed route
• The control-box end and engine end match the required terminal geometry
• The required cable stroke matches the control and engine linkage
• Any control-box or engine-side connection kit is identified before installation
• The cable can be routed without kinks, crushing, heat exposure or interference with moving components

The term 33C describes a broad cable format and does not guarantee that every manufacturer’s cable can be exchanged without checking the terminals, stroke and connection hardware.

How Is C8 Different from MACHZero?

C8 and MACHZero share a universal-style application and 87mm stroke.

• C8: Standard Ultraflex universal 33C-style cable
• C8: 10-32 UNF threaded rod ends and approximately 8mm rod
• C8: Supplied product data states a 200mm / 8in minimum bend radius
• MACHZero: Patented high-efficiency core and more flexible conduit
• MACHZero: Blue high-resistance jacket for demanding routes

Use C8 for a compatible standard universal installation. Select MACHZero where the premium cable construction is required and the connection format is approved.

What Is the Multiflex Equivalent?

Multiflex's official control-cable cross-reference lists the Multiflex EC-133 as the corresponding cable family for the Ultraflex C8. The Multiflex SKU format is EC-133-XX, where XX identifies the cable length in feet.

• Multiflex model: EC-133
• Multiflex cable range: Standard universal 3300 control cable
• Multiflex published travel: 90mm
• Multiflex stated minimum bend radius: 8in / approximately 203mm

This is a manufacturer-published family cross-reference rather than a statement that the two cables are dimensionally identical in every respect. The Ultraflex C8 listing states a stroke of 87mm / 3.4in, while Multiflex publishes 90mm travel for the EC-133. Before substitution, confirm the cable-end geometry, thread, available travel, installed length, bend radius, control-box connection and engine-side connection. Multiflex also advises users to confirm interchangeability before installation.

How Do I Select the Correct Cable Length?

Use the installed cable route and the exact cable-end positions when selecting the length.

• Replacement cable: Check the model and length printed on the existing cable. Where the marking cannot be read, measure the cable from tip to tip and round up to the next whole foot.
• New inboard or sterndrive installation: Measure the unobstructed routed distance A + B from the control to the throttle or shift connection, then round up to the next whole foot.
• New outboard installation: Measure A + B, add 3ft / 90cm for engine movement, then round up to the next whole foot.
• Cable route: Follow the actual installed path rather than a straight-line measurement and allow sufficient space for smooth bends and service access.

An incorrectly short cable can restrict movement or pull against the fittings. Excessive length can create unnecessary bends and increase control effort.

Available Lengths

This Shopify listing contains the following C8 variants:

• AF-4-C8-03: 3ft / 0.91m
• AF-4-C8-04: 4ft / 1.22m
• AF-4-C8-05: 5ft / 1.52m
• AF-4-C8-06: 6ft / 1.83m
• AF-4-C8-07: 7ft / 2.13m
• AF-4-C8-08: 8ft / 2.44m
• AF-4-C8-09: 9ft / 2.74m
• AF-4-C8-10: 10ft / 3.05m
• AF-4-C8-11: 11ft / 3.35m
• AF-4-C8-12: 12ft / 3.66m
• AF-4-C8-13: 13ft / 3.96m
• AF-4-C8-14: 14ft / 4.27m
• AF-4-C8-15: 15ft / 4.57m
• AF-4-C8-16: 16ft / 4.88m
• AF-4-C8-17: 17ft / 5.18m
• AF-4-C8-18: 18ft / 5.49m
• AF-4-C8-19: 19ft / 5.79m
• AF-4-C8-20: 20ft / 6.10m
• AF-4-C8-21: 21ft / 6.40m
• AF-4-C8-22: 22ft / 6.71m
• AF-4-C8-23: 23ft / 7.01m
• AF-4-C8-24: 24ft / 7.32m
• AF-4-C8-25: 25ft / 7.62m
• AF-4-C8-26: 26ft / 7.92m
• AF-4-C8-27: 27ft / 8.23m
• AF-4-C8-28: 28ft / 8.53m
• AF-4-C8-29: 29ft / 8.84m
• AF-4-C8-30: 30ft / 9.14m
• AF-4-C8-31: 31ft / 9.45m
• AF-4-C8-32: 32ft / 9.75m
• AF-4-C8-33: 33ft / 10.06m
• AF-4-C8-34: 34ft / 10.36m
• AF-4-C8-35: 35ft / 10.67m

Dimensions and Fitment

• Stroke: 87mm / 3.4in
• Thread: 10-32 UNF
• Rod diameter: Approximately 8mm
• Minimum bend radius: 200mm / 8in
• Listed length range: 3ft to 35ft
• Cable style: Universal 33C

Maintain at least the stated 200mm bend radius and route the cable without side-loading the threaded rods.

Construction and Design

• Universal 33C-style push-pull cable
• 87mm / 3.4in operating stroke
• 10-32 UNF threaded rod ends
• Approximately 8mm rod diameter
• Stainless-steel end fitting and cable wire in the supplied product data
• Standard black marine control-cable jacket
• Designed for compatible throttle and shift systems

The cable should be replaced if the jacket or rod is damaged, because internal friction or corrosion can affect throttle and shift accuracy.

Installation and Adjustment

Mechanical throttle and shift controls are safety-critical. Installation should be completed by a competent marine technician.

Before installation:

• Confirm the exact cable model and selected length
• Place the control and engine linkage in neutral or idle as applicable
• Isolate the engine starting circuit
• Inspect the control box, cable brackets, terminals and engine linkage for wear or corrosion
• Confirm the planned route provides smooth bends and clearance from heat, sharp edges and moving parts
• Identify every connection kit, clevis, pivot or clamp required at both ends

During installation:

• Route the cable with the fewest practical bends
• Do not kink, crush, twist, drill, shorten or modify the cable assembly
• Do not clamp the outer casing tightly enough to deform it
• Keep the cable clear of exhaust components, belts, steering linkages and moving machinery
• Secure the cable outer casing at the specified support points
• Adjust throttle and shift travel independently where two cables are fitted
• Use only the connection hardware specified for the control and engine

After installation, operate the control through its complete range with the engine switched off and confirm that:

• The control moves smoothly through its complete range
• Neutral and idle positions are correctly aligned
• Forward and reverse engage positively without forcing the linkage against its stops
• Full throttle can be selected without over-travelling the engine linkage
• The cable does not bind, pull tight or contact another component
• All cable terminals, clamps, pins and retainers remain secure
• Outboard engine steering and tilt movement do not stretch or kink the control cables

Do not operate the boat if the control is stiff, neutral cannot be identified positively, a cable is damaged or any terminal or retainer is loose.

Maintenance and Replacement

Inspect the complete control-cable installation regularly and before extended use.

• Check the cable jacket for cuts, abrasion, crushing, swelling or heat damage
• Inspect exposed terminals, pins, clevises and clamps for corrosion or wear
• Check that the cable remains supported without tight or distorted clamps
• Confirm that throttle and shift movement remains smooth and accurately adjusted
• Replace a cable that is kinked, seized, abnormally stiff or mechanically damaged
• Do not attempt to repair a damaged push-pull cable by straightening, splicing or welding it

Frequently Asked Questions

Is the C8 a 33C cable?

Yes. This listing identifies the C8 as a universal 33C-style cable with 10-32 UNF threaded rod ends.

What is the cable stroke?

The C8 has an 87mm / 3.4in stroke.

What is the minimum bend radius?

The supplied product data states a minimum bend radius of 200mm / 8in.

Is C8 the same as MACHZero?

No. They share the universal style and stroke, but MACHZero is Ultraflex’s premium high-efficiency cable.

Are control-box adaptors included?

No. Any required connection kit or engine-side hardware must be ordered separately.

Can I use one cable for both throttle and shift?

No. A mechanical cable operates one function; separate throttle and shift mechanisms require separate cables.

What is the Multiflex equivalent?

Multiflex lists the EC-133 as the cross-reference for the Ultraflex C8. Use the EC-133-XX format, where XX is the cable length in feet. Confirm interchangeability for the exact control, engine, cable travel, terminals and route before installation.

Key Features

• Ultraflex C8 universal 33C-style control cable
• 87mm / 3.4in stroke
• 10-32 UNF threaded rod ends
• Approximately 8mm rod diameter
• 200mm / 8in stated minimum bend radius
• Stainless-steel end fittings
• Suitable for compatible outboard, inboard and sterndrive systems
• Available in the listed 3ft to 35ft variants
• MACHZero premium alternative available separately
• Control box and connection components supplied separately
• Official Multiflex cross-reference: EC-133
• Multiflex SKU format: EC-133-XX
• Cross-reference compatibility must be confirmed before installation