Uiuilz 807252Q5 Thermostat Kit 160° for MerCruiser V6/V8 1987–2016 — gaskets & housing sleeve

The Uiuilz 807252Q5 Thermostat Kit is a complete 160° replacement set engineered to fit MerCruiser GM V6 and V8 inboard/outdrive engines from 1987–2016.

This kit groups a 160° thermostat with multiple gaskets and a plastic sleeve so you can replace the housing components in one service. It’s designed to match common MerCruiser part numbers and aftermarket equivalents, simplifying repairs on 4.3L, 5.0L, 5.7L, 7.4L, and 8.2L engines. The parts included are intended for routine cooling-system maintenance and to restore a proper seal at the thermostat housing.

Which engines and model years will this thermostat kit fit?

The Uiuilz kit fits MerCruiser GM V6 and V8 engines inboard/outdrive setups covering model years 1987 through 2016. It is compatible with 4.3L, 5.0L, 5.7L, 7.4L, and 8.2L displacements commonly used in recreational boats and light commercial vessels.

• Fits MerCruiser V6 & V8 GM engines, 4.3L–8.2L
• Compatible with model years 1987–2016
• Replacement for OEM part numbers including 807252Q5 and related cross-references
• Works with inboard/outdrive configurations

What exactly is included in the kit and why it matters?

This kit supplies a 160° thermostat plus a range of gaskets and a plastic housing sleeve so you can complete a thermostat housing service without sourcing multiple parts. The assortment helps ensure proper sealing and prevents coolant leaks after installation.

• 1x 160° thermostat (replaces MerCruiser 808252)
• 1x plastic housing sleeve (replaces MerCruiser 23-806922)
• Multiple cover and housing gaskets for common housing variations
• Cross-references to GLM 13101 and Sierra 18-3647 for compatibility checks

How does this kit match OEM and aftermarket part numbers?

Uiuilz provides part references that align with popular OEM and aftermarket identifiers so technicians can confirm fitment quickly. The kit lists several replacement numbers, reducing the risk of ordering the wrong component for a mid-service repair.

• Replaces MerCruiser numbers such as 807252Q5, 807252T5, 807252T8
• Crosses to GLM Part #13101 and Sierra part numbers like 18-3647
• Includes matching sleeve and multiple gaskets to address housing variations
• Clear cross-references streamline compatibility checks before purchase

What should I know about warranty and installation notes?

Uiuilz backs the kit with a replacement or refund option if the parts don’t fit your model or if you receive a defective item. It’s recommended to compare the included part shapes and numbers with your existing housing to ensure correct fit before installation.

• Warranty: replacement or refund for fitment issues or defects
• Inspect existing parts and match OEM numbers before purchase
• Follow engine service manuals for torque specs and gasket prep
• Contact Uiuilz customer support for fitment questions; responses promised within 24 hours

Who is this for: The Uiuilz 807252Q5 Thermostat Kit is aimed at boat owners, marine mechanics, and DIY service techs who need a reliable replacement for MerCruiser V6 and V8 thermostat housings. If you’re performing routine cooling-system maintenance, replacing a leaking thermostat housing, or restoring proper engine warm-up control on 4.3L–8.2L MerCruiser engines from 1987–2016, this all-in-one kit supplies the thermostat, sleeve, and gaskets to complete the job in a single repair session.