Multiflex H1N Planetary 150 No Feedback Heavy Duty Single Cable Steering Helm

The Multiflex H1N Planetary 150 Non-Reaction Steering Helm is a single-cable mechanical rotary helm with a built-in friction mechanism designed to reduce steering-wheel torque transmitted from the engine or rudder. It combines a compact planetary gear arrangement with a powder-coated die-cast aluminium-alloy cover, a galvanised-steel 3/4-inch tapered shaft and compatibility with the Multiflex SC-16 steering cable.

Product Identification

• Brand: Multiflex
• Model / item code: H1N
• Product series: Non-Reaction Planetary 150
• Product category: Mechanical marine steering helm
• Product type: Single-cable non-reaction rotary helm
• Steering system: Mechanical cable steering
• Helm mechanism: Planetary gear design with built-in friction mechanism
• Published friction function: Reduces steering torque
• Cable configuration: Single cable
• Number of steering stations: One
• Primary packaged system: MS1N-XX
• Official packaged cable: SC-16-XX
• Official packaged bezel: B1B 90° black bezel
• Published applications: Outboard, inboard and sterndrive
• Published system engine rating: Up to 150HP
• Helm-cover material: High-pressure die-cast aluminium alloy
• Helm-cover finish: Powder-coated
• Helm-shaft material: Galvanised steel
• Steering-wheel shaft: Standard 3/4-inch taper
• Steering-wheel turns: Approximately 4; manual specifies approximately 4.3
• Maximum steering-wheel diameter: 16 inches
• Shaft length: 125mm
• Maximum system travel: 9 inches; published as 228–230mm
• Minimum steering-cable bend radius: 8 inches; published as 200–203mm
• Maximum working load at tiller end: 5000N / 500kg
• Net helm weight: 2.86kg
• Gross helm weight: 3.05kg
• Overall axial length shown: 252mm
• Fixed or tilt helm: Fixed-shaft helm
• Separate tilt version: TH1N
• Global Dometic / SeaStar cross-reference: SH5150P
• Global Ultraflex cross-reference: T73NRFC
• Conflicting Australian Ultraflex reference: T72FC
• Steering cable included: No
• Dashboard bezel included: No
• Steering wheel included: No
• Engine connection kit included: No

What Is the Multiflex H1N Used For?

The H1N converts steering-wheel rotation into push-pull movement through one compatible SC-16 cable while reducing steering torque transmitted back toward the wheel.

• Single-outboard mechanical steering systems
• Inboard mechanical steering systems
• Power-assisted sterndrive steering systems
• Multiflex MS1N-XX packaged steering systems
• Replacement of an existing H1N helm
• Compatible single-station installations requiring reduced reaction torque

What Does Non-Reaction Mean?

Multiflex describes the H1N as having a built-in friction mechanism to reduce torque transmitted through the mechanical steering system.

Non-reaction does not mean hydraulic power assistance, electric steering, automatic course holding, autopilot or zero steering effort.

What Is Included?

• 1 x Multiflex H1N Planetary 150 non-reaction steering helm

Not included unless expressly stated:

• SC-16 steering cable
• Dashboard bezel
• Steering wheel
• Link arm
• Splashwell mounting kit
• Clamp block
• Engine-specific connection hardware
• Hydraulic steering components
• Dual-station hardware

How Many Steering Cables Does the H1N Use?

The H1N uses one SC-16 steering cable. The official MS1N package includes one helm, one cable and one B1B bezel.

Which Steering Cable Is Compatible?

Multiflex pairs the H1N with the SC-16-XX steering cable.

• Stainless-steel output ends
• 8-inch minimum bend radius
• Exceeds ISO 8848/9775
• Dometic / SeaStar SSC62 cross-reference
• Ultraflex M66 cross-reference

Is the H1N Suitable for Engines Up to 150HP?

The complete MS1N system is published for compatible outboard, inboard and sterndrive applications up to 150HP. Do not exceed the boat manufacturer’s rating or the rating of the lowest-rated steering component.

Is the H1N for Single-Station Steering?

Yes. The H1N fact sheet states that the system is for single-station use only.

Which Bezel Is Used?

• B1B: 90° black bezel used in the MS1N package
• B1W: 90° white bezel
• B2B: 20° black bezel
• B2W: 20° white bezel

Which Steering Wheels Are Compatible?

The H1N uses a standard 3/4-inch tapered shaft and accepts a compatible marine steering wheel up to 16 inches in diameter.

What Are the Published Technical Specifications?

• Steering-wheel turns: Approximately 4; manual states approximately 4.3
• Maximum wheel diameter: 16in / 400–406mm
• Shaft length: 125mm
• Maximum travel: 9in / 228–230mm
• Minimum bend radius: 8in / 200–203mm
• Maximum working load at tiller end: 5000N / 500kg
• Net helm weight: 2.86kg
• Gross helm weight: 3.05kg
• Operating temperature: -20°C to +60°C

What Are the H1N Dimensions?

• Front-view height: 137mm
• Left side to centreline: 86.5mm
• Centreline to right side: 64mm
• Rear/body projection shown: 124.5mm
• Overall axial length shown: 252mm

What Dashboard Cutout Is Required?

• Dashboard thickness: 12.7–54mm
• Minimum rear space: 130mm
• Central cutout: 83mm
• Mounting holes: Three x 10mm
• Helm orientations: Five positions at 45° increments

Are Installation Torque Values Published?

• Bezel bracket: 15Nm
• Helm to bracket: 25Nm
• Cable flange bolts: 6Nm

The manual contains conflicting 17Nm and 35Nm instructions for the steering-wheel shaft nut. Confirm the current requirement with Multiflex.

How Does the H1N Differ From the H1?

H1N:

• Built-in friction mechanism
• 2.86kg net weight
• 252mm overall axial length shown
• Global SH5150P and T73NRFC references

H1:

• Standard planetary helm
• 2.09kg net weight
• 247mm overall axial length shown
• T71FC cross-reference

Which Dometic / SeaStar Helm Is Comparable?

The global Multiflex cross-reference table lists the Dometic / SeaStar SH5150P. Direct fit must be confirmed.

Which Ultraflex Helm Is Comparable?

The global Multiflex cross-reference table lists T73NRFC. This is the technically consistent single-cable anti-feedback comparison.

Is the H1N Hydraulic or Power-Assisted?

No. The H1N is a mechanical helm. Its friction mechanism reduces reaction torque but does not provide hydraulic or electric power assistance.

Does the H1N Include Engine Connection Hardware?

No. Link arms, splashwell mounts, clamp blocks, tilt-tube fittings, rudder connections and other engine-specific components are supplied separately.

Construction and Design

• Multiflex H1N Non-Reaction Planetary 150 helm
• Single-cable mechanical rotary design
• Built-in friction mechanism
• Compact planetary gear arrangement
• High-pressure die-cast aluminium-alloy cover
• Powder-coated finish
• Galvanised-steel shaft
• Standard 3/4-inch taper
• Approximately four steering-wheel turns
• 16-inch maximum steering-wheel diameter
• 9-inch travel
• 8-inch minimum bend radius
• 5000N tiller-end working load
• Compatible with SC-16 cable
• Single-station use only
• Fixed-shaft design
• TH1N available as a tilt version
• Global SH5150P and T73NRFC cross-references
• Cable, bezel, wheel and engine connection supplied separately

Installation and Safety

• Confirm the H1N model and complete-system rating
• Do not exceed 150HP or the boat manufacturer’s rating
• Use one compatible SC-16 cable
• Do not select a replacement solely from a cross-reference
• Use the current H1N mounting template
• Confirm dashboard thickness and rear clearance
• Account for the 252mm overall axial length
• Select the correct bezel angle
• Resolve the steering-wheel nut torque discrepancy
• Maintain an 8-inch minimum cable bend radius
• Keep the cable clear of sharp edges, heat and electrical wiring
• Secure the cable approximately every 2m
• Check correct port and starboard movement
• Check outboard steering throughout the complete tilt range
• Recheck fasteners after the first two hours of operation
• Do not dismantle or modify the friction mechanism
• Do not operate the vessel if steering binds or reaction torque changes unexpectedly

Maintenance

• Service every 30 days in salt water
• Service every 90 days in fresh water
• Arrange specialist inspection at least every two years
• Wash away salt deposits
• Check fasteners monthly
• Inspect metal parts for corrosion
• Inspect the cable conduit for abrasion
• Investigate sudden changes in wheel friction or steering effort
• Replace damaged components before further operation

Key Features

• Multiflex H1N non-reaction steering helm
• Single-cable mechanical steering
• Built-in friction mechanism to reduce torque
• Compatible systems up to 150HP
• Outboard, inboard and sterndrive applications
• Approximately four steering-wheel turns
• 9-inch cable travel
• 8-inch minimum bend radius
• 5000N tiller-end working load
• Standard 3/4-inch tapered shaft
• Die-cast aluminium-alloy cover
• Powder-coated finish
• Galvanised-steel shaft
• Compatible with SC-16 cable
• Single-station use only
• Global SH5150P and T73NRFC references
• T72FC reference requires additional verification
• Steering cable, bezel, wheel and engine hardware supplied separately