• 91356-SD4-953 Honda Marine O-Ring | Genuine OEM Outboard Part
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91356-SD4-953 Honda Marine O-Ring | Genuine OEM Outboard Part

91356-SD4-953 Honda Marine O-Ring | Genuine OEM Outboard Part

$10.50 AUD
$10.50 AUD
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✓ Authorised Volvo Penta Dealer · Marine & auto specialists · Ships Australia-wide

🔧 Product Description

Genuine Honda Marine Thermostat O-Ring - Part Number: 91356-SD4-953

Genuine Honda 31.5 × 2.4mm thermostat sealing O-ring used primarily on selected BF75A and BF90A outboards. This NOK-supplier version seals the thermostat-cover joint against cooling-water leakage.

⚙️ Key Features

  • Genuine Honda Marine replacement seal
  • Nominal dimensions: 31.5mm × 2.4mm
  • NOK supplier-coded version
  • Designed for thermostat and cooling-water housings
  • Recommended replacement whenever the thermostat cover is removed

🚤 Compatibility

Commonly used on

  • Honda BF75 and BF90 thermostat assemblies
  • Cooling-water housing joints

Typically suits

  • Engine models:
  • BF75A family
  • BF90A family
  • Selected BF75AT and BF90AT configurations
  • HP Range: 75HP-90HP
  • Engine Type: Inline-four four-stroke outboards
  • Year Range: Approximately 1997-2006
  • Serial Note: Confirm whether the parts diagram specifies the NOK 953 version or the ARAI 952 version for the engine serial.

🔌 Function

The O-ring seals the thermostat cover and prevents cooling water escaping from the housing.

⚠️ Common Signs of Failure

  • Water seepage near the thermostat cover
  • White salt deposits around the housing
  • Corrosion beneath the thermostat cover
  • Irregular cooling-system pressure
  • Brittle, compressed or damaged seal

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 91356-SD4-953 (documented Honda supplier-specific reference)

OEM / Related Numbers

  • 91356SD4953
  • 91356-SD4-952 — same nominal size with alternate ARAI supplier designation
  • Seal size reference: 31.5 × 2.4mm

Aftermarket / Verified Equivalents

  • No aftermarket equivalent

📦 Condition

  • Genuine Honda Marine part
  • Brand new
  • Supplied in original or equivalent protective packaging

Shipping & Delivery

Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.

Returns & Warranty

14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.

Not sure this fits?

Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.

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