In Stock Water Pump CH12859 for Yanmar 3T80-J 3T90-J
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21214596 Double V-Belt Sea Water Pump Pulley, 34° groove, cast iron — compatible with Volvo Penta 4.3L, 5.0L and 5.7L marine engines. Stocked in our Guangzhou warehouse for fast dispatch on seawater cooling system repairs.
Ships within days from ready stock so your vessel returns to service without extended downtime.
Single-Piece Dispatch — Guangzhou warehouse shelves hold this seawater pump pulley ready for same-day packing when your vessel is tied up waiting.
| Parameter | Value |
|---|---|
| Part Number | 21214596 |
| Product Type | Belt Pulley |
| Cross-Reference (reference only) | 21214596, 3858229, 3862487, 3812697 |
| Machine Fitment | Volvo Penta 4.3L, 5.0L, 5.7L (4.3GIJWTR through 5.7GSPWTR series) |
| Material | High-strength cast iron |
| Surface Treatment | Phosphate + oil anti-corrosion finish |
| Groove Type | Double V-belt, 34° included angle |
| Runout Tolerance | ≤0.05 mm |
| Surface Hardness | 220–240 HB |
| Salt Spray Test | 96-hour neutral salt spray (NSS) per ASTM B117 |
| Max RPM | 4,200 RPM |
| Torque Load | 120 Nm |
| Condition | New Aftermarket |
| Warranty | 6-month manufacturer defect warranty |
| MOQ | 1 piece |
| Standards | ISO 9001, ASTM B117 |
| Failure Symptom | Replacement Urgency |
|---|---|
| Squealing or chirping from raw water pump drive at idle | Immediate — belt slip reduces coolant flow, risks overheating |
| Visible groove wear or glazing on pulley face | Schedule within current service window before belt throws |
| Wobbly pulley with measurable runout under load | Urgent — bearing side-load accelerates pump seal failure |
| Cracked or corroded pulley hub discovered during belt swap | Replace now — hub fracture strands the vessel |
| Vessel laid up awaiting pulley from dealer channel | Express order to cut multi-week lead time to days |
Your engine is already cold and the charter clock is running.
The most common message we receive at odd hours is a blurry nameplate photo and a question: do you have this pulley on the shelf? Waiting for a confirmation email while the tide window closes is not an option for inland river charters or coastal ferries. A Double V-Belt Sea Water Pump Pulley in stock fast shipping replacement changes the conversation from "when can we get it" to "which courier flight does it catch." [NEED_CITE: marine engine raw water cooling system maintenance intervals]
When salt crust and paint overspray make the nameplate unreadable, our technical team works from a smartphone image of the engine block casting number or the old pulley itself. You send the photo, we match it against the Volvo Penta 4.3L, 5.0L, and 5.7L engine family variants, and confirm whether this belt pulley fits your specific serial range. The Double V-Belt Sea Water Pump Pulley in stock fast shipping replacement is verified before the box is sealed, not after it arrives at your marina.
Stock on the Guangzhou warehouse floor means the pulley is physically counted, not allocated from a supplier pipeline. Once fitment is confirmed, packing starts with anti-corrosion wrapping suited to humid port storage, followed by carton sizing that keeps the Double V-Belt Sea Water Pump Pulley in stock fast shipping replacement protected through courier sorting hubs. Express shipments typically reach major ports within days, while air freight and sea freight options remain on the table for less urgent restocking. [NEED_CITE: international express freight transit benchmarks for marine spares]
The 34° included double V-groove angle matches the belt profile that Volvo Penta specifies for these displacement families, keeping the belt seated under the torsional pulses of a four-stroke marine engine at cruise RPM. Runout held to ≤0.05 mm matters because even slight wobble at 4,200 RPM translates into cyclic side-loading on the raw water pump bearing, which is the component you do not want failing mid-channel. The phosphate and oil finish is not cosmetic — it buys corrosion resistance during the months a spare sits in a damp bilge locker before it is needed. Surface hardness in the 220–240 HB range gives the groove walls enough wear resistance to outlast multiple belt change cycles without developing the polished surface that causes slip. The 96-hour salt spray rating per ASTM B117 provides a standardized benchmark for how the finish holds up in saltwater atmosphere exposure. [NEED_CITE: ASTM B117 neutral salt spray testing relevance to marine component coatings]
Ordering from a catalog that copies cross-reference tables without verification can put a pulley with the wrong bore or hub offset on your workbench three days later. The vessel sits idle through a second round of return shipping, re-ordering, and waiting. A Double V-Belt Sea Water Pump Pulley in stock fast shipping replacement sourced with confirmed cross-reference verification eliminates that loop. Workshop labor, missed charter revenue, and client goodwill erosion all compound during the gap between a wrong part arriving and the right one showing up. [NEED_CITE: economic impact of incorrect spare parts ordering in commercial marine operations]
Our selected production lines and qualified sourced supply all carry the same QC protocol and the same six-month warranty terms, so you are not managing two quality tiers in one order. Eight product categories under one account means the pulley, the matching V-belts, the raw water pump impeller kit, and the thermostat gasket all consolidate into a single dispatch. The one-piece minimum removes the barrier when you need exactly one pulley for an emergency and cannot justify buying ten. Guangzhou warehouse inventory on common marine engine items is checked and updated continuously, giving realistic dispatch commitments at quote time rather than hopeful estimates. Send us a worn number, a machine model, or a nameplate photograph and our technical team responds with fitment confirmation rather than a generic catalog link. Sample supply is available when you want to verify groove profile and hub dimensions on your own bench before committing a fleet order.
Q: Is this double V-belt seawater pump pulley in stock and when can it ship? A: Yes, this pulley is stocked in our Guangzhou warehouse. Once you confirm the engine model and we verify fitment against your Volvo Penta serial range, packing begins the same working day for orders confirmed before the daily dispatch cutoff. We quote the dispatch date at the time of order, not as a generic estimate.
Q: What is the minimum order — can I buy just one piece? A: The minimum order quantity is one piece. There is no bulk requirement, so a single pulley for an emergency breakdown ships on the same terms as a larger restocking order. This applies to all belt pulleys and associated cooling system parts in our catalog.
Q: How long until it arrives at my port or marina? A: Transit depends on the shipping method selected at order. Express courier typically reaches major ports within days, air freight within roughly one to two weeks, and sea freight within several weeks. We confirm the estimated arrival window at quote time based on your specific destination and chosen method.
Q: My nameplate is worn — can I confirm fitment from a photo? A: Send a clear photograph of the engine block casting number, the old pulley, or whatever legible markings remain on the nameplate. Our technical team cross-references the image against the Volvo Penta 4.3L, 5.0L, and 5.7L engine variants and confirms whether this pulley matches before you commit to the order.
Q: What happens if the pulley does not match on arrival? A: Notify us immediately with photos of the received part alongside your original order details. Our warranty covers manufacturing defects for six months. If a fitment mismatch traces to a confirmed cross-reference error on our side, we arrange replacement dispatch at the earliest available shipping window.
Not sure if this part fits your machine? Send us your machine model number and serial number via WhatsApp or email -- our specialists will verify compatibility within 2 hours.
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