32-41725-33 3/4-Inch Transom Water Intake Hose · Fits MerCruiser R MR Alpha One Gen II, Replaces 18-3602, 47110, 8M0215001

32-41725-33 3/4-Inch Transom Water Intake Hose · Fits MerCruiser R MR Alpha One Gen II, Replaces 18-3602, 47110, 8M0215001

GHMarine 3/4-inch water intake hose for the bell-housing / transom raw-water circuit on select R / MR / Alpha One / Alpha One Gen II assemblies. Primary OEM 32-41725-33 (also 32-4172533). Service / supersession path: 32-8M0062309 → 32-8M0109048 → 32-8M0215001. Catalog size about 13-7/8 inches long × 3/4-inch I.D..

Ships as one standalone molded water-intake hose. This is not a complete transom repair kit (no bellows, gimbal bearing, or multi-hose kit). Clamp count is not locked on this page — confirm against your package.

Which hose is this?

It is the single 3/4-inch molded hose in the sterndrive bell-housing / transom water-intake route. It carries raw cooling water through the transom assembly into the boat cooling system.

It is not the Bravo Design I hose (32-43437 — GH 18H1001), not Bravo Design II (32-8M0062102), not the older 5/8-inch intake hose (32-32461 — GH 19H1001), and not an engine-bay circulating-pump molded hose.

Signs yours is due

• Bilge water collects on the Alpha / R / MR transom side after sitting in the slip — trace the 3/4-inch bell-housing intake hose, not the engine-bay circulating hose.
• Raw-water flow looks weak with a clean impeller: the 3/4-inch hose is ovalized where it passes the bell housing (5/8-inch hoses are a different SKU).
• Old hose stamped 32-41725-33 / 8M0062309 / 8M0215001 is hard, cracked, or cut by clamps — measure 3/4-inch I.D. before ordering.
• Divert: leak only after pulling a Bravo drive → wrong page (Bravo Design I hose). Old hose is 5/8-inch → GH 19H1001, not this SKU.

Will it fit my drive?

This 3/4-inch intake hose is Compatible with select MerCruiser R / MR / Alpha One / Alpha One Gen II transom assemblies whose parts record specifies 32-41725-33 (or the service numbers in the supersession path). Drive name alone does not prove fit — confirm hose number, 3/4-inch I.D., ~13-7/8-inch length, routing, and sterndrive / transom serial.

*Representative catalog / Where Used bands. Final fit = original hose number + 3/4-inch I.D. + length/routing + sterndrive/transom SN — not drive badge alone.

OEM & swap numbers

Primary identity 32-41725-33 / 32-4172533. Supersession path 32-8M0062309 → 32-8M0109048 → 32-8M0215001. Cross-refs below are for the same 3/4-inch hose family.

Wrong part? Read before you order

• NOT Bravo Design I hose 32-43437 / 8M0090859 / 18-3603 (GH 18H1001)
• NOT Bravo Design II hose 32-8M0062102
• NOT 5/8-inch intake hose 32-32461 / 18-3601 / 47120 (GH 19H1001)
• NOT engine-side cooling hose 32-52481 / 18-70930
• NOT circulating-pump molded hose 32-87108 (GH 18H1006) or 2.5/3.0L U hose (GH 18H1004)
• NOT a full transom service kit (30-803097T1 / 30-803099T1 style multi-part kits)

What ships in the box

• 1 × 3/4-inch molded water-intake hose (32-41725-33 family)
• Clamps: not locked as a fixed outbound BOM on this page — confirm quantity against your package

Often ordered with related SKUs

• Bravo Design I water intake hose → GH 18H1001
• 5/8-inch Alpha / older intake hose → GH 19H1001
• V6/V8 circulating-pump molded hose → GH 18H1006
• Transom bell-housing exhaust bellow → GH 17B1003

Install tips on the transom water circuit

Bell-housing / transom raw-water hose work. Cold engine; disconnect battery; support the drive / follow the service manual for access. This is a water hose — not an exhaust bellow. Do not use bellows adhesive or a bellows expander.

1. Match the old hose number, 3/4-inch I.D., ~13-7/8-inch length, and routing before removal; photograph clamp positions.
2. Drain / catch water as needed; loosen clamps; remove the old hose; clean mating tubes and check for corrosion or sharp edges.
3. Seat the new hose fully on the correct ports without twist or kink; place clamps on the clamp lands.
4. Tighten to the service-manual specification for that assembly (no universal torque invented on this page).
5. Run and check for leaks and normal raw-water flow / temperature before returning the boat to service.

FAQ

Is this a complete Alpha / R / MR transom seal kit?

No. 18H1003 is one 3/4-inch water-intake hose only — no bellows, gimbal bearing, or multi-hose seal kit parts.

My boat is R / MR / early Alpha One — what must match?

Match 32-41725-33 (or the 8M service path), 3/4-inch I.D., ~13-7/8-inch length, and the sterndrive/transom serial. Drive badge alone is not enough.

I already bought a Bravo Design I hose — is that the same?

No. Bravo Design I is 32-43437 (already listed separately). This page is the R/MR/Alpha 3/4-inch bell-housing intake hose.

My old hose measures 5/8-inch — can I stretch this on?

No. 5/8-inch is GH 19H1001 (32-32461 family). Do not force a 3/4-inch hose onto 5/8-inch ports.

Does the box include a full set of kit clamps and gaskets?

No. This page locks the molded hose only. Clamp count is not a fixed kit BOM here — check your package.

Should I use bellows adhesive on this hose?

No. Water-intake hose service uses the normal clamp method for your transom — not bellows adhesive / expander steps from an exhaust-boot listing.

Please note

Aftermarket replacement by GHMarine. Not affiliated with engine manufacturers named above. "Compatible with", "Replaces", and supersession numbers identify the 32-41725-33 3/4-inch family — always confirm hose number, I.D., length, routing, serial, and package contents before ordering.