Jabsco 15278-1000 Flapper Assembly Kit
The Jabsco 15278-1000 is the genuine flapper assembly kit for Jabsco 15780-0000 and 15780-0100 bronze marine diesel engine cooling pumps, with flanged ports. The flapper assembly is the moving valve element inside the pump that controls flow through the pump end and helps it prime.
These pumps supply raw water to the engine heat exchanger, so a worn part shows up as rising engine temperature, slow priming or reduced flow at the overboard discharge. Replace worn parts during a planned overhaul rather than waiting for an overheat alarm, and inspect the neighboring parts in the pump end at the same time, since they wear together.
Key Features
- Genuine Jabsco replacement flapper assembly kit
- For 15780 series marine diesel cooling pumps
- Factory dimensions and materials
- Restores cooling flow and priming
- Direct replacement for worn parts
- Supports a complete pump overhaul
Applications
- Jabsco 15780-0000 and 15780-0100 pumps
- Marine diesel raw water cooling
- Work boats and commercial vessels
- Planned cooling system overhauls
- Restoring flow after overheating
- Keeping critical spares aboard
Specifications
- Brand: Jabsco
- Manufacturer Part Number: 15278-1000
- Part Type: Flapper assembly kit
- Fits: Jabsco 15780-0000 and 15780-0100 engine cooling pumps
- Quantity Needed: One per pump
- Condition: New
Frequently Asked Questions
Q: Can the pump run dry?
Only briefly at start while it primes. Close the seacock only with the engine stopped.
Q: What should I inspect while the pump is open?
Check the impeller, cam ring, plate faces, shaft seal and bearings, since they wear together.
Q: How do I know the cooling pump needs attention?
Rising engine temperature, reduced flow at the overboard discharge and slow priming after start are the usual signs.
Q: Should I rebuild the whole pump at once?
On a critical engine it is good practice to replace the wear parts together during a planned overhaul.
Not sure this is the right part? Send us a Picture of the Pump Plate on your pump and the CLR Marine team will confirm the correct flapper assembly.
CLRMarine
