NGK spark plug BR5HS – code: 47.558.37 – Osculati

NGK BR5HS Osculati spark plug (code 47.558.37)

The NGK BR5HS spark plug offered by Osculati is a spare part designed for the regular maintenance of engines, especially in the nautical field where reliability and operational continuity are key aspects. It is a commonly used solution as a first equipment spark plug on various outboard motor brands, making it a practical reference for those who need to perform a replacement consistent with the original installation.

This sheet refers to the product identified by Osculati code 47.558.37 and the model NGK BR5HS. To avoid errors when ordering, it is advisable to always check the code on the installed spark plug and/or the engine's technical documentation.

Main features and details

The spark plug is identified by the code BR5HS, useful for precisely recognizing the model during replacement. In assistance and spare parts contexts, the correct identification of the code is fundamental to maintain the configuration provided by the engine manufacturer.

Product identification

• Spark plug model: NGK BR5HS
• Supplier: Osculati S.r.l.
• Supplier product code: 47.558.37

Standard installation (usage context)

From available information, these spark plugs are standard equipment on engines from various brands, including:

• Mariner
• Yamaha
• Suzuki
• Mercury
• Tohatsu
• Selva
• Honda

Note: the presence of the brand in the list does not imply universal compatibility with all models or all years. Verification must be carried out based on the spark plug currently installed or the manufacturer's specifications.

Matches (reference)

For those using equivalence tables, the following match is indicated:

• Champion match: L90C

Equivalences are a support tool for finding replacement parts but do not replace verification of the correct code required by the engine.

Typical applications

The NGK BR5HS spark plug is suitable as a replacement in maintenance and restoration operations on engines where this specification is required. In the nautical field, periodic replacement of spark plugs is among the most common activities to maintain regular ignition and reduce issues related to wear or fouling.

When it may be useful to replace it

• During scheduled engine maintenance
• In case of preventive replacement before a usage season
• When there is a need to restore worn ignition components
• As a spare replacement on board for quick interventions

Operational advantages

• Recognizable replacement: the code BR5HS allows immediate identification of the model.
• Consistency with the original installation: indicated as standard equipment on various brands, useful for “like-for-like” replacements.
• Support for research: presence of a Champion match (L90C) for those working with equivalences.
• Maintenance convenience: typical component to consider during periodic ignition system checks.

Usage and important notes

For a correct replacement, it is essential to work safely and follow the engine manufacturer's instructions. If unsure about compatibility or procedure, it is advisable to consult a technician.

Verification tips before purchase

• Check the abbreviation shown on the spark plug currently installed (BR5HS).
• configuration Osculati code 47.558.37 if following a parts list or supplier catalog.
• If using an equivalence table, consider the Champion match L90C as a reference, still confirming the required code.

Installation notes (generic)

• Operate with the engine off and cold, with a clean working area.
• Avoid contamination (dirt or residues) in the spark plug area during removal.
• Follow the manufacturer's instructions for tightening and post-intervention checks.

If you are performing maintenance on an outboard and want an identifiable and consistent replacement with the intended installation, the NGK BR5HS Osculati spark plug represents a targeted choice when the code matches that required by your engine.

FAQ – Frequently Asked Questions

Is this spark plug compatible with all Yamaha, Mercury, or Honda engines?

No. It is indicated as standard equipment on various brands, but compatibility depends on the engine model and year. Always check the code on the installed spark plug or the manufacturer's specifications.

What is the Osculati reference code for this spark plug?

The indicated supplier product code is 47.558.37.

What is the Champion equivalent for the NGK BR5HS?

The reported equivalent is Champion L90C.

How can I be sure to order the correct spark plug?

Check the code printed on the currently installed spark plug (BR5HS) and compare it with the engine's technical documentation. If in doubt, ask a technician for support or provide the engine data for verification.

Is it suitable as a spare replacement to keep onboard?

Yes, it can be a practical choice as a spare part if your engine uses the BR5HS code. In any case, verifying the required code remains essential.

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