My Account
Shopping Cart

Quicksilver 860256A 4 Thermostat Housing Assembly MerCruiser V6 V8 Bravo Sterndrive

Manufacturer

Part Number

860256A 4
Sale Price

$379.48

4 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Quicksilver 860256A 4 is an OEM genuine factory thermostat housing assembly designed for MerCruiser inboard and sterndrive applications. This housing is a critical component of the engine's closed cooling system, directing coolant flow to maintain optimal operating temperature and prevent overheating in marine environments.

Key Features:

  • Genuine OEM Quicksilver / Mercury Marine part — not aftermarket
  • Designed for MCM/MIE GM V-6 and V-8 engines (305 & 350 CID) equipped with Bravo sterndrives
  • Compatible with MerCruiser 4.3L V6, 5.0L, 5.7L, and 6.2L V8 engine configurations
  • Four-pipe thermostat housing design for proper coolant routing
  • Direct OEM replacement for worn, cracked, or damaged thermostat housings
  • Sold as a single housing assembly (gaskets, bolts, seals, and plugs not included)

Replaces / Cross-Reference Part Numbers:

  • Mercury / Quicksilver OEM: 860256A2, 860256A3, 861006A1, 87290A4, 8M0061381
  • Aftermarket: MAL9-42500, SIE18-1989, 18-3530, 18-35301, 855470

This is a genuine Mercury Marine factory part backed by Mercury Marine's standard 1-year factory warranty against defects in materials and workmanship. Ensure proper fitment by confirming your MerCruiser engine serial number prior to ordering.

Website looks good. Product description a little confusing. Not sure if I was ordering a set or a single item.

Shipping could be a little cheaper, probably should have shopped around more but I'm tired of being on the internet, I give up and just pay it.

Easy to use site with competitive pricing.

easy to find most parts could not find front emblem for grill

Tried to call support but stayed on hold for 32 minutes with it saying I'm next in line but it is what it is

quick easy and best price

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy