Heurofosh Power Steering Pump 16792A39 for MerCruiser 4.3–8.2L — Direct-Fit Aftermarket Replacement

Heurofosh 16792A39 is a direct-fit power steering pump designed to replace worn units on MerCruiser gas engines from 4.3L through 8.2L, restoring hydraulic steering function on boats.

If your MerCruiser-powered boat is producing squeals, knocking, or a stiff steering wheel, the steering pump is often the cause. This Heurofosh aftermarket pump matches common OEM part numbers and fits a wide range of MerCruiser 4.3–8.2L gasoline engines, offering an affordable option to get hydraulic steering performing correctly again. Verify fit by comparing mounting and the reservoir return hose orientation before purchase.

Which engines and OEM numbers does this pump fit?

This Heurofosh pump is built to be compatible with many MerCruiser gas V6 and V8 applications. It lists multiple OEM part numbers so you can match it against your original unit or parts diagram to confirm compatibility.

• Compatible engine displacements: 4.3L (262 V6), 5.0L (305 V8), 5.7L (350 V8), 5.8L (357), 6.2L (377 V8), 6.3L (383/385), 7.4L (454 V8), 8.2L (502 V8).
• Common OEM numbers matched: 16792A1, 16792A39, 16792A33, 18-7508.
• Designed as a replacement for Alpha and Bravo drive configurations where specified.

How do I know my steering pump needs replacement?

Signs of a failing pump are usually audible or affect steering feel. If you notice noise or loss of hydraulic assist, inspect the pump and hoses promptly to avoid further damage.

• Unpleasant or grinding noise when turning the wheel.
• Stiff or unresponsive steering effort under load.
• Loud squealing from the engine compartment during steering input.
• Knocking sounds or persistent fluid leaks around the pump.

What should I compare before buying and installing?

Not every pump variant is identical—physical orientation and hose locations matter. Confirm the return hose outlet position, mounting bolt pattern, and pulley alignment to ensure a correct swap without modification.

• Check that the reservoir return hose exits from the bottom of the reservoir as shown in reference images.
• Compare photos and the original part number on your old pump to the Heurofosh listing.
• Verify mounting holes, shaft spline count, and pulley size for alignment with your setup.
• Contact seller with your engine model if uncertain about fit before purchasing.

What can I expect from installation and performance?

When correctly matched to your engine and installed with clean hydraulic fluid, the pump should restore normal steering assist. Use the recommended marine power steering fluid and bleed the system according to the manufacturer’s instructions to avoid air binding or harsh feel.

• Replace with clean hoses and new clamps if old components show wear or leakage.
• Bleed the steering circuit to remove trapped air after installation for consistent assist.
• Inspect belt tension and alignment to prevent premature noise or wear.
• Test steering at idle and underway to confirm quiet, responsive operation.

Who is this for: Boat owners and marine technicians operating MerCruiser 4.3L–8.2L gasoline engines who need a cost-effective, direct-replacement power steering pump. This option suits anyone restoring hydraulic steering performance on Alpha or Bravo drive boats, provided they verify part numbers, hose orientation, and mounting details against their original pump before ordering.