Top 8 Mercruiser 3.0 Thermostat Housing – Automotive Replacement Engine Thermostats

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1. GLM


Thermostat Kit for Mercury Marine Mercruiser 2.5 and 3.0 Replaces 59078 59078Q3 18-3650

GLM #ad - Also fits many inline 6 cylinder egnine. Meets or exceeds OEM specs. Replaces 59078 59078q3 18-3650 New thermostat kit for gM 2. 5l or 3. 0l inline 4-cylinder engines. Includes 140 degree thermostat and gasket.
BrandGLM #ad
ManufacturerGLM #ad
Part Number13370

2. Jofynzo


Thermostat Kit 160 Degree 807252Q5 and Gaskets Sleeve 23-806922 for Mercury Marine Mercruiser 4.3 5.0 5.7 V6 V8 Engine Replace 807252T5 807252T8 23806922 ‎ 807252T 5

Jofynzo #ad - Note: please check the part number before purchase. Ensure: if there is any problem with the product, please do not hesitate to contact us, we will help you solve the problem. Fit: for mercruiser engines v-6 and v-8 except high performance engines made by General Motors model year 1987 and newer with standard cooling requiring a 160 degree F thermostat. Replace part number: 23-806922, 807252t 5, 807252q5, 807252t5, 23806922, 807252T8. Includes: 1 x thermostat, 3 x cover gaskets, 2 x housing gaskets & 1 x O-Ring, 1 x Sleeve, comes as shown in the first image.
BrandJofynzo #ad
ManufacturerJofynzo #ad
Part Number23-806922

3. The ROP Shop


The ROP Shop | Thermostat Kit for MerCruiser 3.0L 181 L4 1A002000 & Up Sterndrive Boat Engines

The ROP Shop #ad - Please be sure to check your part or model number to ensure this is the correct thermostat kit for your unit. Fits/for: 1987-2016 mercruiser v-6 & v-8 gm inboard/outdrive engines except high performance engines with standard cooling requiring a 160° F thermostat.

Also, please note this may replace multiple part numbers. Includes - 1 thermostat, 1 sleeve, 3 cover gaskets, 2 Housing Gaskets & 1 O-Ring; comes as shown in the first image. Specs - refer to images 2 & 3 for more information. The rop shop replacement thermostat kit for mercruiser 3. 0l 181 l4 1a002000 & up sterndrive Boat Engines.
BrandThe ROP Shop #ad
ManufacturerThe ROP Shop #ad
Part Number101606_35

4. Mercury Marine/Mercruiser


Mercury Marine/Mercruiser New OEM 160 Degree Thermostat Kit, 807252T5

Mercury Marine/Mercruiser #ad - Fits: 1987 and newer gm engines with standard cooling, requiring a 160?? thermostat. Please verify your own fitment. Contains all parts to change a 160?? thermostat.
BrandMercury Marine/Mercruiser #ad
ManufacturerMercury Marine/Mercruiser #ad
Height2 Inches
Length6.12 Inches
Weight1.25 Pounds
Width5.75 Inches
Part Number807252T 5

5. Engineered Marine Products


18-3650, 59078T3, 3.0L, Replaces 59078, 120 hp, 140 hp, 59078Q3, Engineered Marine Products Thermostat Kit for Mercruiser 2.5L

Engineered Marine Products #ad - Made in u. S. A. Replaces part numbers: 59078, 59078q3, 59078t3, 18-3650. Please see product description for Application Information, Model Serial Number Range and Year. ***. Kit includes: 140° Degree Thermostat and Gasket. Also fits inline 6 Cylinder 1970-1981.
BrandEngineered Marine Products #ad
ManufacturerEngineered Marine Products #ad

6. A.A


A.A Thermostat Housing Sleeve Replacement For Mercury MerCruiser 23-806922

A.A #ad - This thermostat sleeve meets or exceeds OEM specifications. Thermostat sleeve/Retainer for MerCruiser Marine Engines. Replaces mercury part # 23-806922. Part #10 in the parts diagram.
BrandA.A #ad
ManufacturerAutomotive Authority LLC® #ad
Part Number23-806922



Thermostat Housing Sleeve 23-806922 Replacement for Mercruiser 2 Pcs

AIPICO #ad - Made of high quality Material, More Durable, Long Serivce Life. Replacement for mercruiser 4 cyl 2. 5l 3. 0l; mercruiser 3. 7l 4. 3l 5. 0l 5. 7l 7. 4l 8. 2l v6-v8 gm. Replace part numbers: 23-174951 23-17495 23-805532. Plastic sleeve Used to Hold Thermostat in Place. Aftermarket thermostat Retaining Sleeve, 2 PCS.
BrandAIPICO #ad
ManufacturerAIPICO #ad
Part Number23-806922

8. Unknown


B. 140 Degree Thermostat kit for Mercruiser with Sleeve

Unknown #ad - Fits 1983 and newer gm v-6 and v-8 engines with standard cooling, requiring a 140-degree thermostat. Includes 140 degree thermostat, gaskets, and brass sleeve. New thermostat kit for Mercruiser V6 and V8 engine. Replaces part numbers 807252Q4, 23-47508T.
BrandUnknown #ad
ManufacturerB.B. #ad
Part Number43220-24342