• 119773-42570 Yanmar Water Pump O-Ring | Genuine OEM Marine Part
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119773-42570 Yanmar Water Pump O-Ring | Genuine OEM Marine Part

119773-42570 Yanmar Water Pump O-Ring | Genuine OEM Marine Part

$12.65 AUD
$12.65 AUD
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🔧 Product Description

Genuine Yanmar Sea Water Pump Cover O-Ring - Part Number: 119773-42570

A genuine Yanmar O-ring used beneath the sea-water-pump cover plate on numerous JH- and 6LP-series marine diesel pumps. It seals the removable impeller cover so the pump can prime and maintain suction without drawing air or leaking seawater.

⚙️ Key Features

  • Genuine Yanmar sea-water-pump cover O-ring
  • Factory elastomer and cross-section for the specified pump cover groove
  • Reusable only if undamaged; replacement is recommended whenever the cover is opened
  • Used with both direct-mounted and front-mounted sea-water-pump arrangements

🚤 Compatibility

Commonly used on

  • Yanmar 3JH4E and 3JH5E
  • Yanmar 4JH4E, 4JH5E, 4JH45, 4JH57, 4JH80 and 4JH110 pump families
  • Yanmar 6LP-DT/DTE/DTZE, 6LP-ST/STE/STZE and related WDT/WST variants
  • Yanmar 6LPA-STP/STZP and related later LP-series variants
  • Electric-generator and auxiliary-engine versions using the same sea-water-pump cover

Typically suits

  • HP Range: Engine-model dependent
  • Engine / System Type: Yanmar JH- or LP-series marine diesel sea-water pump
  • Year Range: Approximately 2000s onward, with broad pump-family application
  • Serial / Identification Range: Confirm the sea-water-pump model and cover-plate groove. Yanmar uses several similar pump-cover seals across different pump manufacturers and engine families.

🔌 Function

Seals the sea-water-pump cover plate so the pump remains airtight on the suction side and seawater does not leak around the cover.

⚠️ Common Signs of Failure

  • Seawater leaks from the pump cover
  • Pump fails to prime after impeller service
  • O-ring is flattened, cut, swollen or brittle
  • Cover groove is corroded or damaged
  • Impeller has been inspected or replaced and the cover has been removed

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 119773-42570 - current verified Yanmar service reference
  • No later direct Yanmar supersession confirmed

OEM / Related Numbers

  • 119773-42570
  • 11977342570

Aftermarket / Verified Equivalents

  • JMP / aftermarket O-ring replacement for Yanmar 119773-42570
  • Generic O-rings should not be substituted without confirming seawater-resistant material and exact cross-section

📦 Condition

  • Genuine Yanmar OEM marine O-ring, brand new.
  • Brand new
  • Supplied in manufacturer 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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