SKU:
Osculati-47.558.59
€ 14,45
1-2 weeks delivery time
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NGK LFR4AE (Osculati 47.558.59) is a resistor-type marine spark plug with M14 × 1.25 mm thread, 19 mm reach, 16 mm hex, and factory-set 0.9 mm gap. Designed for 4-stroke outboards from Yamaha, Mercury, Suzuki, Mariner, Tohatsu, Selva, and Honda. It features a recessed electrode and colder heat range (4), suitable for high-performance, high-compression engines. No direct Champion equivalent.
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Osculati 47.558.59 – NGK LFR4AE Marine Spark Plug
The NGK LFR4AE (Osculati 47.558.59) is a premium resistor-type spark plug developed for 4-stroke marine engines that require extended ignition stability under high-performance or high-compression operating conditions. With its long 19 mm reach, recessed ground electrode, and cold heat range (4), this plug is ideal for engines exposed to full-throttle use, prolonged load, or extreme combustion pressures.
Key Features:
- Cold heat range (4) designed for high-output marine applications
- Recessed ground electrode enhances anti-fouling and improves flame propagation
- Built-in resistor for suppression of radio frequency interference (RFI)
- Long 19 mm reach ensures proper fitment in modern cylinder heads
- Corrosion-resistant construction ideal for harsh marine environments
Technical Specifications:
Attribute Value Model NGK LFR4AE Osculati Code 47.558.59 Thread Diameter M14 × 1.25 mm Reach 19 mm Hex Size 16 mm Heat Range 4 (cold) Gap 0.9 mm Electrode Type Standard with recessed ground electrode Resistor Yes
Manufacturer Compatibility:
- Yamaha
- Mercury
- Mariner
- Suzuki
- Tohatsu
- Selva
- Honda
Cross Reference:
Brand Model NGK LFR4AE Champion –
The NGK LFR4AE is engineered for outboards operating under sustained full-load conditions. Its recessed electrode supports cleaner combustion and reduced pre-ignition risk, while the cold heat rating ensures thermal stability. Ideal for marine professionals requiring long-life plugs with OEM-level reliability and protection against misfire and fouling.
Documents
Osculati Catalogue 2025 - page 874 Size: 150,5 Kb -
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