Volvo Penta Seawater Pump 24699792

Volvo Penta Seawater Pump — 24699792

What This Part Does

The 24699792 is the current Volvo Penta replacement seawater pump for selected 40-series marine diesel engines. It draws raw cooling water from the vessel’s seawater intake and circulates it through the engine’s raw-water cooling circuit, where it absorbs heat before being discharged overboard. The pump uses a flexible-impeller design in the F8B-905 pump family — a bronze-bodied, flange-mounted pump with slotted shaft-end drive. 24699792 is the current OEM replacement for earlier pump 838522 in the applicable Volvo Penta engine cooling-system diagrams.

If only the flexible impeller is worn and the pump body, shaft, bearings, and seals remain in good condition, an impeller or pump service kit may be sufficient instead of replacing the complete assembly. Replace the full pump assembly when the housing, shaft, bearings, or seals are worn or damaged.

Compatible Applications

• MD40A
• TMD40A
• TMD40B
• TMD40C
• AQD40A
• TAMD40A
• TAMD40B
• AD40B
• AQAD40A
• AQAD40B

Confirm by engine model, serial number, and the seawater-pump position in the applicable Volvo Penta cooling-system diagram. Volvo Penta used more than one pump arrangement across the broader 40-series family — the diagram is the definitive confirmation.

Serial Number & Fitment Notice

Confirm the exact engine model and serial number against the Volvo Penta cooling-system diagram before ordering. The supersession chain 838522 → 24699792 is the strongest identifier: if your engine’s diagram or existing pump shows 838522, then 24699792 is the current replacement.

Dimensions

Pump connections are sized for 35 mm / 1.38 in. ID hose on the equivalent Johnson Pump F8B-905 specification. Confirm inlet and outlet orientation against the original pump and the Volvo Penta cooling-system diagram for your specific engine model and serial number before installation.

When to Replace

• Pump housing or cover is cracked, badly worn, or heavily corroded
• Shaft or bearing play is evident when the shaft is checked by hand
• Water leaks at the pump shaft seal
• Pump no longer primes or delivers adequate seawater flow
• Repeated impeller failures indicating internal pump wear at the housing bore
• Drive end coupling or mounting flange is damaged
• Engine overheating traced to insufficient raw-water flow

A seawater pump that fails to deliver adequate flow will cause engine overheating quickly. If the pump body and internals are serviceable, replacing the impeller alone may be sufficient — inspect the housing bore for scoring and the shaft seal for leakage before deciding on impeller-only vs. full pump replacement.

Service Interval

Volvo Penta recommends inspecting and replacing the flexible impeller at regular service intervals — typically annually or as specified in the engine service schedule for the specific model. The pump assembly itself should be inspected for shaft play, seal leakage, and housing wear at each impeller service. Full pump replacement is required when housing, shaft, or seal condition cannot be restored by impeller replacement alone.

Installation Notes

• Close the seawater intake seacock before disconnecting hoses
• Compare the replacement pump’s inlet/outlet orientation with the original before installation
• Inspect seawater hoses, hose clamps, and inlet strainer for wear, collapse, or restriction at the same time
• Confirm the drive coupling engages correctly with the pump shaft before securing the mounting flange
• Lubricate or pre-wet the impeller according to the Volvo Penta service procedure to prevent dry-start damage
• Open the seacock and check for leaks at all connections before starting the engine
• Verify seawater discharge flow immediately after startup and confirm coolant temperature remains stable
• Follow the Volvo Penta service manual procedure for the specific engine model and serial number

Alternate & Superseded Part Numbers

• 24699792 — current Volvo Penta seawater pump (this part)
• 838522 — superseded Volvo Penta seawater pump → replaced by 24699792
• 844971 — earlier Volvo Penta seawater pump reference on selected applications
• Johnson Pump 10-24130-1 — predecessor equivalent
• Johnson Pump 10-24130-2 — OEM-equivalent F8B-905
• Johnson Pump 10-24130-3 — open-market F8B-905 equivalent

Technical FAQ

Q: My engine currently has 838522 installed. Is 24699792 a direct replacement?
A: Yes. Volvo Penta parts data identifies 24699792 as the current replacement for 838522 on the applicable 40-series engines. Confirm against your engine’s cooling-system diagram and serial number as a final check.

Q: Can I replace just the impeller instead of the full pump?
A: Yes, if the pump body, shaft, bearings, and seal are still in good condition. Inspect the housing bore for scoring and the shaft for play before deciding. If the pump is leaking at the shaft seal, or the housing bore is worn and no longer retains a good impeller fit, replace the full assembly.

Q: How often should I replace the seawater pump impeller?
A: Annually or per the Volvo Penta service schedule for your specific engine model. Impellers can fail suddenly if run dry even briefly, so regular proactive replacement is better practice than waiting for a cooling failure.

Q: Is the Johnson Pump 10-24130 series a direct substitute for this pump?
A: The Johnson Pump 10-24130 series is the equivalent F8B-905 pump family referenced in the application data for these engines. Confirm compatibility by engine model and the Volvo Penta cooling-system diagram before substituting a non-OEM pump assembly.

Q: What causes repeated impeller failures on these engines?
A: The most common causes are running the engine briefly without seawater flow (dry-starting), a partially blocked intake or strainer starving the pump, worn pump housing bore that no longer supports the impeller correctly, or an impeller that was installed without lubrication. Check the intake strainer and seacock condition whenever an impeller fails prematurely.

Parts Desk Insights

The key selling point for 24699792 is the supersession chain — if a customer has an engine showing 838522 in the diagram or on the old pump, 24699792 is the current OEM answer and a straightforward order. The most common situation beyond that is customers trying to decide between impeller-only and full pump replacement: if the pump is out and there’s any shaft play, a leaking seal, or visible housing bore wear, the full pump is the right recommendation at this service stage. Intake strainer condition is worth asking about on any seawater pump order — a blocked or collapsed strainer is the number-one cause of premature impeller failure on these engines, and a customer who replaces the pump without clearing a strainer restriction will be back for another pump.