Quicksilver Inlet Water Hose for MerCruiser MR, Alpha One & Gen II — Molded Rubber, OEM Fit

Quicksilver 8M0215001 is a molded replacement inlet water hose engineered to restore proper raw-water flow to MerCruiser MR, Alpha One and Gen II transom cooling systems.

When a boat's cooling intake hose shows age, cracks or fails, engine temperatures and performance can be affected. This OEM-compatible Quicksilver inlet hose is molded from durable rubber to match the original fit and flow path for select MerCruiser outdrives and transoms. Using a properly fitting inlet hose helps maintain reliable circulation through heat exchangers and raw-water cooled components.

How does this hose match my MerCruiser MR or Alpha One transom?

The hose is specifically shaped and sized to align with the factory inlet ports on MerCruiser MR, Alpha One and Gen II transoms so installation follows the original routing without excessive bending. Molded ends provide a consistent seal surface where clamps attach, minimizing leaks and misalignment. Installing a hose that mirrors OEM dimensions reduces stress on fittings and prevents premature wear.

• Direct OEM-compatible molding for accurate fit
• Correct inner diameter for specified MerCruiser models
• Pre-formed shape to avoid kinks and keep flow steady

What materials and construction ensure durability?

This inlet hose is built from molded rubber formulated for marine environments, resistant to saltwater and the temperature cycles common in engine bays. The material balances flexibility for routing with enough stiffness to resist collapse under suction. Because it’s molded rather than cut-and-joined, there are fewer weak points where leaks or separations typically begin.

• Molded rubber body for long-lasting resilience
• Uniform walls to resist abrasion and crushing
• No glued or clamped joints in critical areas

How simple is installation and what do I need?

Installation is straightforward for anyone familiar with basic marine plumbing and outdrive maintenance. Replace the old hose with the Quicksilver part, secure the molded ends with appropriate clamps, and route it following the original line to avoid sharp bends. Standard hose clamps and basic hand tools are typically all that's required.

• Swap-out installation using existing hose clamps or new stainless clamps
• No special adhesives or fittings needed for correct installation
• Recommended to inspect adjacent fittings and strainer during replacement

Will replacing the inlet hose affect engine cooling performance?

Replacing a worn or damaged inlet hose restores the intended raw-water flow path, which helps sustain consistent cooling performance under load. A correctly sized, undamaged hose reduces the chance of air intrusion and flow restriction that can lead to overheating events. It’s part of routine preventive maintenance to keep the cooling system operating as designed.

• Prevents flow loss from cracks, collapse or leaks
• Helps maintain steady raw-water circulation to heat exchangers
• Reduces risk of air pockets and suction-related issues

Who is this for: Owners, mechanics and fleet managers who operate MerCruiser-powered boats with MR, Alpha One or Gen II transoms and need a reliable, OEM-compatible replacement inlet hose. It’s ideal for seasonal maintenance, pre-launch inspections, or when the existing hose shows deterioration, ensuring correct fit and predictable cooling system behavior.