JMP Marine JSK0098 Major Service Kit for JPR-VP0040DB Seawater Pump
When a seawater pump starts weeping at the seal or the shaft has picked up a groove behind the impeller, replacing the impeller alone only buys a little time. The JSK0098 is JMP Marine's answer to that problem: a complete major service kit that takes the JPR-VP0040DB engine cooling pump back to as-new internals in one sitting, without hunting down individual part numbers from three different suppliers.
The kit is built around the wear items that actually fail on a raw water pump. You get a new shaft, two ball bearings, the mechanical seal set, both snap rings, the slinger and end cover O-rings, a new end cover with its six screws and washer, the drive pulley, and the 7400-01 flexible impeller. The complete JSM0080 minor service kit is folded in as well, so nothing is left half-finished when the pump comes apart on the bench. Every component is dimensionally interchangeable with the genuine Volvo Penta pieces it replaces.
It fits the JPR-VP0040DB, which is the JMP replacement for Volvo Penta 21419374, 22901573 and 3841697 on D4 series engines. Boatyards and owner-operators tend to keep one aboard on longer passages, because a major kit plus basic hand tools is the difference between a two-hour job at anchor and a tow. If the pump body itself is sound, this kit is all that stands between it and another few thousand hours of service.
Key Features
- Complete major overhaul kit for the JMP JPR-VP0040DB seawater pump
- Includes the full JSM0080 minor service kit, so no second order is needed
- New 7400-01 flexible impeller supplied with the impeller kit hardware
- Two ball bearings and a matched mechanical seal set for a full rotating-assembly rebuild
- New pump shaft eliminates seal-groove wear that ruins fresh seals
- New end cover, end cover O-ring and six stainless end cover screws
- Drive pulley included, so a worn or corroded pulley does not have to be reused
- Large and small snap rings plus slinger O-ring included for correct reassembly
- Components dimensionally interchangeable with genuine Volvo Penta parts
- Single part number simplifies spares inventory and refit planning
Applications
- JMP Marine JPR-VP0040DB engine cooling seawater pump
- Volvo Penta D4-225A-E
- Volvo Penta D4-260A-E
- Volvo Penta D4-260D-E
- Volvo Penta D4-300A-E
- Volvo Penta D4-300D-E
- Pumps carrying Volvo Penta 21419374, 22901573 or 3841697
- Scheduled major service intervals, seasonal layup and pre-season commissioning
- Repower and engine refit work where the raw water pump is reused
Specifications
- Part number: JSK0098
- Type: Major service kit, engine cooling / seawater pump
- Services pump: JPR-VP0040DB
- Ball bearing, BER0058, qty 2
- Screw, end cover, BOL0163, qty 6
- Washer, BOL0164, qty 1
- End cover, COV0051, qty 1
- Impeller kit, 7400K, qty 1
- Flexible impeller, 7400-01, qty 1
- O-ring, end cover, ORG0032, qty 1
- O-ring, slinger, ORG0044, qty 1
- Mechanical seal set, MCSSET0016, qty 1
- Pulley, PUL0031, qty 1
- Shaft, SHA0115, qty 1
- Snap ring, small, SNP0006, qty 1
- Snap ring, large, SNP0010, qty 1
- Minor service kit, JSM0080, qty 1
- Interchangeable with genuine Volvo Penta components: yes
Frequently Asked Questions
Q: How do I know whether I need the major kit or the minor kit?
A: Choose the minor kit when the impeller and end cover are the only worn items and the pump still turns freely with no leakage. Choose the JSK0098 major kit when the pump drips from the weep hole, feels rough or notchy by hand, or shows shaft scoring, because those symptoms point to the seal, bearings or shaft rather than the impeller.
Q: Do I need to remove the pump from the engine to install this kit?
A: Yes. Because the kit replaces the shaft, bearings and mechanical seal, the pump has to come off the engine and be disassembled on a bench where the rotating assembly can be pressed apart and reassembled cleanly.
Q: Can I use the JSK0098 on a pump that still carries the original Volvo Penta casting?
A: The kit is specified for the JPR-VP0040DB and its components are made interchangeable with the genuine parts used in that pump family, so it is generally suitable for the OEM units it replaces. Confirm your existing pump number before ordering, since Volvo Penta issued more than one raw water pump across the D4 range.
Q: Is the impeller in this kit the same one sold separately?
A: The kit contains the 7400-01 flexible impeller supplied as part of the 7400K impeller kit, which is the same impeller offered on its own as 7400-01K for routine seasonal changes.
Q: How often should a major service be carried out?
A: Most operators change the impeller annually or every few hundred hours and perform a major service when the pump shows seal or bearing wear, typically somewhere between 1,000 and 2,000 hours depending on how much sand, silt or debris the cooling water carries. Follow the engine manufacturer's interval where one is published.
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