Part number lookup
18-7721 Replacement Parts
Cross-reference and compare 1 replacement listing for OEM / aftermarket part number 18-7721. Use this part-number page — not a generic equipment or brand hub — to review price, availability, and fitment before ordering.
1 Matching Product
Part Numbers and Cross References
Applications and Fitment Summary
- Mercury · s: Fit For Mpi, Efi Engine With Boost Pump, 8.1L, 496 Cid For 3/8″ I.D. Fuel Line Fit For Mercury MerCruiser
Frequently Asked Questions
What parts replace OEM number 18-7721?
This page lists 1 replacement listing indexed under 18-7721. Compare cross references, applications, and pricing before ordering.
How do I confirm fitment for 18-7721?
Match the stamped part number first, then verify machine model, engine code, serial number, mounting points, and photos of your old part before checkout.
Can I request a quote if 18-7721 is not an exact match?
Yes. Use the fitment inquiry form with your machine plate, engine model, and photos. Support can review alternatives or cross references.