Indmar Marine Ignition Wire / Spark Plug Lead Set – Black Small Block HVS | Part #751106

Restore crisp reliable ignition performance with this genuine Indmar black ignition wire set for the small block marine engine with High Voltage Switch (HVS) ignition system. A complete wire set is one of the most impactful ignition upgrades you can make — delivering clean high voltage pulses from the HVS distributor to every spark plug for consistent firing across all cylinders all season long.

Compatible with: Indmar small block marine engines with High Voltage Switch (HVS) ignition systems fitted.  Contact us to verify fitment for your specific model year before ordering.

What is the High Voltage Switch (HVS) ignition system?
The High Voltage Switch ignition system is an advanced electronic ignition design used on Indmar small block marine engines — replacing the traditional points-based distributor system with solid state switching technology. The HVS system delivers:

• Higher spark energy than conventional ignition systems
• More precise spark timing for improved combustion efficiency
• Stronger spark under high compression and high RPM conditions
• Improved reliability — no mechanical points to wear or corrode
• Better performance in the humid and moisture-rich marine environment
• Compatibility with the MEFI engine management system

The ignition wire set is the critical link between the HVS distributor and the spark plugs — carrying the elevated high voltage output of the HVS system to each cylinder. Standard ignition wires are not rated for the higher voltage output of the HVS system — always use the correct HVS specification wire set.

What does the ignition wire set do?
The ignition wire set carries high voltage pulses from the HVS distributor cap to each spark plug — one wire per cylinder on the small block V8. The wires must:

• Handle the elevated voltage output of the HVS ignition system without leaking
• Resist cross-firing between adjacent wires under high voltage conditions
• Withstand heat, oil, moisture, and vibration in the marine engine bay
• Maintain consistent resistance across all wires for even cylinder firing
• Connect securely at both the distributor cap and spark plug boot ends

Signs your ignition wires need replacing:

• Misfires or rough running persisting after new spark plugs are fitted
• Hard starting especially in damp or humid conditions
• Visible cracking, brittleness, or heat damage on wire insulation
• Carbon tracking — black lines along the wire surface indicating voltage leakage
• Wires feel stiff or have lost flexibility
• Burning smell from the engine bay under load
• Visible arcing between adjacent wires in low light conditions
• Interference on marine electronics or radio — caused by wire shielding breakdown

How often should you replace them?
Replace your ignition wire set every 2 to 3 seasons or at the first sign of deterioration. The enclosed marine engine bay creates particularly harsh conditions for ignition wires — heat cycling, moisture, oil exposure, and vibration all accelerate wire degradation faster than automotive applications.

Why marine ignition wires are different to automotive wires:
Marine ignition wires must meet strict additional requirements:

• Flame resistant insulation — essential in the enclosed marine engine bay
• Enhanced moisture resistance for high humidity and bilge splash exposure
• Suppressed electromagnetic interference for marine electronics compatibility
• Higher voltage rating for HVS ignition system output
• Never substitute automotive ignition wires in a marine application — they do not meet marine safety or HVS voltage requirements

Pro tip: When replacing your ignition wire set always replace your HVS distributor cap and spark plugs at the same service. The distributor cap, wire set, and plugs work as a complete ignition system — replacing wires alone means your new wires are working with worn components that will soon cause the same symptoms. A complete ignition service saves labour costs and delivers reliable performance for the full season ahead.

Pairs perfectly with:

• 556345GM – Distributor Cap High Voltage Switch
• 491008 – Spark Plug 5.7L Standard Non-Catalysed
• 685007 – Raw Water Pump Impeller
• 636127 – Water/Fuel Separator Filter

Features:

• Genuine Indmar OEM black ignition wire set
• Designed specifically for small block HVS ignition system applications
• Rated for elevated HVS high voltage output
• Enhanced moisture and heat resistance for marine engine bay conditions
• Suppressed electromagnetic interference for marine electronics compatibility
• Complete set — all wires for full V8 engine coverage
• Direct replacement — no modifications needed

Part Number: 751106
In stock and shipped fast from Australia 🇦🇺