Skip to product information
27-18785-1 Head Gasket Replacement for Mercury 135-200 HP Outboard
$77.99
Sale price
$77.99
Regular price
$99.99
FREE shipping on this itemShips from West Long Branch, NJ. Typically arrives in 3–7 business days.
30-day returnsChanged your mind? Send it back within 30 days. Return policy
Secure checkoutQuestions? Call 1-888-460-3822 · Mon–Fri 9–5 ET
Key features
- Compatibility & Cross-Reference: Directly replaces OEM part numbers 27-18785-1 and 18785T; Serves as an exact cross-reference replacement for GLM 35850, Mallory 9-63851, and Sierra 18-3861 marine components
- Engine Application: Effectively prevents coolant or raw water from leaking into the cylinders while completely isolating external oil and water cooling passages for peak motor performance
- Fitment Checked:Provides a precise seal for 105, 135, 140, 150, 175, and 200 HP 2.5L V6 configurations, including XR-4, XR-6, MAGNUM, Jet, and SST 120
- Material & Durability: Built for the harshest marine environments featuring saltwater resistance; Designed to withstand extreme thermal cycling and the intense cylinder pressures required by high-performance 2.5L carbureted applications
- Product Origin: Made in Taiwan; Please note that international orders may be subject to local import regulations and customs clearance, which are the responsibility of the recipient upon delivery
Free shipping included. 30-day hassle-free returns.







