DABAZUALY MerCruiser Thermostat Kit 160° for 4.3L–8.2L V6/V8 – gaskets & sleeve included

DABAZUALY 160° thermostat kit for MerCruiser V6/V8 GM engines replaces OEM part 807252Q5 and includes gaskets plus a plastic sleeve for straightforward inboard/outdrive cooling system service.

This complete kit is built to restore correct thermostat function on 1987 and newer MerCruiser GM inboard/outdrive engines (4.3L, 5.0L, 5.7L, 7.4L, 8.2L). It supplies a 160° thermostat plus multiple cover and housing gaskets and a plastic sleeve so you have the sealing components needed for a clean installation. The set is compatible with common replacement part numbers from MerCruiser, Sierra and GLM and is intended for routine maintenance or part replacement during mid-engine cooling repairs.

What parts are included with the kit and why do they matter?

The kit contains a 160° thermostat, a plastic sleeve, and a selection of cover and housing gaskets so you can replace worn seals and the temperature valve in one service interval. Having the matching gaskets prevents leaks and helps ensure the thermostat seats properly.

• 1 x 160° thermostat (direct replacement for Merc 808252)
• 1 x plastic sleeve (replacement for Merc 23-806922)
• Multiple cover and housing gaskets (replaces several Merc part numbers)
• Fits GLM 13101 and replaces Sierra 18-3647 (note: Sierra kit may omit sleeve)

Which engines and model years will this thermostat kit fit?

This kit is sized for GM-based MerCruiser V6 and V8 marine engines produced from 1987 onward. It covers common inboard/outdrive engine displacements used in MerCruiser installations, so it’s applicable across a broad range of boat models and maintenance scenarios.

• Compatible with 4.3L, 5.0L, 5.7L, 7.4L, and 8.2L engines
• Intended for MerCruiser V6 & V8 GM inboard/outdrive units (1987–2016 and later models)
• Replaces Merc part numbers such as 807252Q5, 807252T8, 807252T5
• Also cross-references Sierra 18-3647 and GLM 13101

How does this kit simplify installation and maintenance?

By grouping the thermostat, sleeve and all necessary gaskets, the kit reduces the chance of missing a seal during service and avoids a return to the parts store. The included sleeve helps ensure the thermostat operates in the correct position within the housing while the gaskets provide reliable sealing to prevent coolant bypass.

• All-in-one set reduces multiple parts orders and downtime
• Sleeve aids proper thermostat alignment and movement
• Multiple gaskets accommodate different cover and housing configurations
• Replacements match common OEM reference numbers for straightforward swaps

Are there warranty or fitment assurances with the purchase?

The product comes with a replacement or refund option if the kit does not fit your engine or if a quality defect is found after purchase. Check fitment details against your engine VIN or part history prior to installation to reduce the need for returns.

• Eligibility for replacement or refund if defective or incorrect fit
• Verify engine type and part cross-reference before installation
• Includes multiple gasket options to match several housing layouts

Who is this for: This DABAZUALY thermostat kit is for marine owners, mechanics and service shops that maintain MerCruiser GM-based V6 and V8 inboard/outdrive engines. It suits anyone performing routine cooling system maintenance, replacing a failed thermostat, or rebuilding the thermostat housing where matching gaskets and a sleeve are required for a leak-free installation. If you need a direct replacement for Merc or Sierra reference numbers and prefer a single kit that contains both the valve and the sealing components, this set is designed to simplify the job and reduce trip time for additional parts.