Swap that cracked universal tubing for Mercury MerCruiser’s Molded Cooling Hose 32-818741 and keep your 7.4 L Bravo running cool and leak-free. Pre-formed at the factory, this hose routes raw water from the circulating pump to the thermostat housing on big-block 454 Mag and Horizon packages—no kinks, no guess-work with flex hose and clamps at odd angles.

• OEM-molded EPDM rubber handles 200 °F coolant and salt-spray without hardening or “checking.”

• Exact 1¼-in. I.D. with 90° and 45° bends tucks neatly around the pump pulley and front mount—zero chafe on belts or wiring.

• Textile reinforcement layer holds shape under high-rpm pump pulses so flow stays steady at wide-open throttle.

• White part number ink makes mid-season checks simple—if it still reads 32-818741, you know it’s the right one.

Install is a 20-minute, no-mess job: slip off the old hose, clean the barbs, drop this one on, and torque the stainless clamps. The payoff is a cooler manifold, quieter belt whine, and confidence that every gallon of cooling water gets exactly where MerCruiser’s engineers intended—mile after mile back to the dock.