Mercruiser 3/4" Water Intake Hose | Sierra 18-3602
Mercruiser 3/4" Water Intake Hose | Sierra 18-3602
Sierra
12 in stock
Couldn't load pickup availability
Sierra 18-3602 — MerCruiser 3/4" Water Intake Hose | Fits MR, Alpha I & Gen II Sterndrives | In Stock at MacombMarineParts.com
A cracked or deteriorated water intake hose is one of the most common causes of overheating in MerCruiser sterndrive applications — and one of the easiest fixes when you have the right part on hand. The Sierra 18-3602 is a direct OEM-spec replacement for the 3/4" water intake hose on MerCruiser MR, Alpha I, and Gen II sterndrives, replacing both the original MerCruiser part and the Mallory equivalent.
In stock and ready to ship from MacombMarineParts.com.
Part Details:
- Sierra Part Number: 18-3602
- Hose Diameter: 3/4"
- Hose Length: 13-7/8"
- Fits: MerCruiser MR, Alpha I, and Gen II sterndrive models
- Replaces MerCruiser OEM #32-4172533
- Replaces Mallory #9-72003
- Manufacturer: Sierra Marine
- Condition: New
- Country of Origin: USA
Additional Information
Why Choose Sierra Marine Parts?
- OEM-spec fit — correct diameter and length for a leak-free, direct replacement
- Trusted aftermarket brand — Sierra is one of the most widely used marine aftermarket suppliers for MerCruiser applications
- Multiple cross-references — replaces both MerCruiser 32-4172533 and Mallory 9-72003
- In stock and ships fast — don't let a $14 hose keep your boat on the trailer
Frequently Asked Questions
1. How do I know if this is the right hose for my sterndrive?
The Sierra 18-3602 fits MerCruiser MR, Alpha I, and Gen II sterndrive models and replaces OEM part #32-4172533. Cross-reference your existing part number or check your sterndrive's parts diagram to confirm. If you're unsure, contact us at MacombMarineParts.com and we'll help you verify before you order.
2. What are the exact dimensions of this hose?
The 18-3602 is 3/4" in diameter and 13-7/8" in length — the correct spec for the MerCruiser water intake application it's designed to replace.
3. Is Sierra a quality replacement for OEM MerCruiser parts?
Yes. Sierra Marine is one of the most established aftermarket marine parts manufacturers and is widely used by marine mechanics and dealers as a reliable OEM-equivalent replacement. The 18-3602 is built to the same dimensional and material specifications as the original MerCruiser hose.
! Compatibility references are provided for informational purposes only and do not constitute a fitment guarantee. Part numbers, application listings, and "replaces" cross-references are based on manufacturer data and are intended as a starting point for identification — not a guarantee of fit for your specific engine, hull, or installation.
Buyer is solely responsible for verifying compatibility with their engine model, serial number, model year, and trim configuration before purchase. If you are unsure whether this part fits your application, contact MacombMarineParts.com before you buy — we're available via text, email, or online chat to help verify compatibility for your specific application.
MacombMarineParts.com is not liable for parts ordered based on assumed fitment. Returns due to buyer-selected incorrect fitment are subject to our standard return and restocking fee policies.