Circulation pumps

Volvo Penta water pumps - Cooling water circuit

Water pumps for Volvo Penta are central components in the cooling water circuit and ensure the continuous delivery of seawater or cooling water through the engine block and heat exchanger. OEM-accurate pumps according to engine type, year of manufacture and reference number ensure correct delivery rate, connection dimensions and thermal stability. Precise selection prevents overheating, reduces wear and ensures long-term operational reliability in maritime applications.

Water pump for Mercruiser, OMC, Volvo Penta 8.1L MD3861341
Water pump for Mercruiser, OMC, Volvo Penta 8.1L MD3861341
article nr.05033

(circulating pump) for the V8 big block engines
Volvo ref. no. 3861341, Mercruiser ref. no. 8M0113736

268,98 EUR / Piece
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
Cover Volvo Penta 860409
Volvo Penta
Cover Volvo Penta 860409
article nr.RM860409

Suitable for the following models: AQAD31A AD31A, B, XD, D-A, L-A, P-A AD41A, B, D, L-A, P-A AQAD41A KAD300-A KAD42A, B, P-A KAD43P KAD44P KAMD300-A KAMD42A, B, P-2 KAMD44P-A, P-C TAMD31A, B, D, L-A, P-A, M-A, S-A TAMD41A, B, D, H-A, H-B, P-A, L-A, M-A TAMD42B TAMD42WJ-A

250,09 EUR
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Max quantity: 1 )
Cover Volvo Volvo Penta 855410
Volvo Penta
Cover Volvo Volvo Penta 855410
article nr.RM855410

Suitable for the following models: 230A, B 250A, B 251A AQ131 AQ151 AQ171

198,73 EUR
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Max quantity: 6 )
Housing Volvo Penta 861657
Volvo Penta
Housing Volvo Penta 861657
article nr.RM861657

Suitable for the following models: AQAD31A AD31A, B, XD, D-A, L-A, P-A AD41A, B, D, L-A, P-A AQAD41A KAD300-A KAD42A, B, P-A KAD43P KAD44P KAMD300-A KAMD42A, B, P-2 KAMD44P-A, P-C TAMD31A, B, D, L-A, P-A, M-A, S-A TAMD41A, B, D, H-A, H-B, P-A, L-A, M-A TAMD42B TAMD42WJ-A

642,05 EUR / Piece
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Max quantity: 1 Piece)
Intercooler cover Volvo 44/300 Volvo Penta 861263
Volvo Penta
Intercooler cover Volvo 44/300 Volvo Penta 861263
article nr.REC861263

Suitable for the following models: AQAD31A AD31A, B, XD, D-A, L-A, P-A AD41A, B, D, L-A, P-A AQAD41A KAD300-A KAD42A, B, P-A KAD43P KAD44P KAMD300-A KAMD42A, B, P-2 KAMD44P-A, P-C TAMD31A, B, D, L-A, P-A, M-A, S-A TAMD41A, B, D, H-A, H-B, P-A, L-A, M-A TAMD42B TAMD42WJ-A

237,17 EUR
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Max quantity: 1 )
Spare parts water pump Volvo Penta AD, KAD, MD23059414
Spare parts water pump Volvo Penta AD, KAD, MD23059414
article nr.099999

Spare parts for circulation pump for D31, 41, 42, 43, 44, 300, KAD32P
Volvo Penta ref. no. 23059414, 3809412

product details
Original spare part
Water pump for Mercruiser, OMC, Volvo Penta 4.5L, 6.2L MPI 8M0116534
Mercury-Mercruiser-Quicksilver
Water pump for Mercruiser, OMC, Volvo Penta 4.5L, 6.2L MPI 8M0116534
article nr.09533

Marine water pump (circulation pump) for the 4.5 L and 6.2 L MPI models .
Mercruiser 8M0116534

518,52 EUR / Piece
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
Original spare part
Water pump for Mercruiser, Volvo Penta 8.1L
Mercury-Mercruiser-Quicksilver
Water pump for Mercruiser, Volvo Penta 8.1L
article nr.03318

Mercruiser ref. no. 883925 , Volvo Penta ref. no. 3861341

422,58 EUR / Piece
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
Water pump for Volvo Penta B21/B23, MD3856036, MD855566
Water pump for Volvo Penta B21/B23, MD3856036, MD855566
article nr.04907

Circulation pump for AQ125B, AQ145B
Volvo Penta Ref. no. 3856036, 855566

795,31 EUR / Piece
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
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  • Over 15 years’ experience in the marine spare parts trade
    Over 15 years’ experience in the marine spare parts trade
  • Official Mercury & MerCruiser dealer
    Official Mercury & MerCruiser dealer
  • A wide range of boat engine spare parts from A to Z
    A wide range of boat engine spare parts from A to Z
  • Spare parts for Volvo Penta, MerCruiser, Yamaha, Honda, Suzuki and more
    Spare parts for Volvo Penta, MerCruiser, Yamaha, Honda, Suzuki and more
  • Fast delivery for maintenance, servicing and repairs
    Fast delivery for maintenance, servicing and repairs
  • Order boat spare parts conveniently online 24/7
    Order boat spare parts conveniently online 24/7

Function of the water pump in the cooling water circuit

The water pump is the heart of the Volvo Penta cooling system. It ensures the continuous transportation of the coolant through the engine block, cylinder head and heat exchanger. Depending on the engine concept, either sea water (open system) or coolant (closed system) is pumped.

Fault-free pump function is crucial for

  • constant operating temperature

  • Avoidance of overheating

  • Protection of seals and bearings

  • Stable performance

Without sufficient pumping capacity, thermal overload can quickly occur.

Differences: Raw water pump vs. coolant pump

Seawater pumps (raw water pumps)
Pump water directly from the water through a heat exchanger and exhaust system. Usually equipped with impeller technology.

Coolant pumps (fresh water pumps)
Circulate antifreeze coolant in a closed circuit within the engine.

Both pump types differ in design, sealing system, flow rate and connection geometry. Mixing them up can lead to malfunctions or installation problems.

OEM reference number for reliable matching

Volvo Penta water pumps are clearly defined by OEM reference numbers. These contain all technical specifications regarding housing shape, connection diameter, bearing and delivery rate.

Recommended selection strategy:

  1. Check OEM reference number

  2. Determine motor type and serial number

  3. Match year of manufacture

  4. Define pump variant (seawater/fresh water)

This structured selection reduces returns and ensures technical compatibility.

Accuracy of fit & installation instructions

The following points must be observed when replacing a water pump:

  • Depressurize the cooling system

  • Remove old seals completely

  • Use new seals and O-rings

  • Tighten the fastening screws to the correct torque

  • Bleed the cooling system and check the function

Incorrect installation can lead to leaks, air pockets or reduced flow rate.

Typical signs of damage

Signs of a defective water pump are

  • Overheating of the engine

  • Loss of coolant at the pump shaft

  • Bearing noises or vibrations

  • Reduced water delivery

  • Visible corrosion on the housing

Early replacement prevents consequential damage to the cylinder head, seals and heat exchanger.