Thermostats, Housings & Fillers

Thermostat, 160 Degree, High-Flow, Copper/Brass, Each

Part Number: MRG-4363

4.03 out of 5 stars ( 63 )

Estimated Ship Date: Monday 11/3/2025

Water Neck, Aluminum, Chrome Plated, O-Ring, 45 Degree, Chevy, Big/Small Block, Each

Part Number: MRG-2661

4.5 out of 5 stars ( 36 )

Estimated Ship Date: Monday 11/3/2025

Water Neck, Aluminum, Polished, Straight Up, 1.50 in. Hose, GM, LS Engine, Each

Part Number: MRG-2671NA

3.29 out of 5 stars ( 7 )

Estimated Ship Date: Monday 11/3/2025

Water Neck, Diecast Aluminum, Chrome Plated, 90 Degree, Ford, 429/460, Each

Part Number: MRG-2664

3.21 out of 5 stars ( 14 )

Estimated Ship Date: Monday 11/3/2025

Water Neck, Aluminum, Polished, 15 Degree, Chevy, Big/Small Block, Each

Part Number: WND-6250

3.22 out of 5 stars ( 9 )

Estimated Ship Date: Monday 11/3/2025

Water Neck, Aluminum, Black Powdercoated, 45 Degree, Chevy, Big/Small Block, Each

Part Number: WND-6252

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 11/3/2025

Water Neck, Aluminum, Polished, 90 Degree, Chevy, Big Block, Small Block, Each

Part Number: RAU-G6007

Not Yet Reviewed

Estimated Ship Date: Nov 20, 2025 if ordered today

• Drop Ship
• Special Order

Thermostat for 1987-2016 MerCruiser V6 and V8 engines with standard cooling requiring a 160°F thermostat.

Part Number: QSV-807252Q5

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Thermostat for V-6 Mercury/Mariner outboards, 135/150 hp with s/n A904646 & above, 175 hp s/n C100861 & above, and 200 hp with s/n 6435503 & above.

Part Number: QSV-75692Q2

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Thermostat for the MerCruiser 496 sterndrive and 8.1L inboard engines. It is a 160°F thermostat.

Part Number: QSV-8M0076464

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Thermostat for various MerCruiser sterndrive applications with standard cooling systems. It is a 140°F thermostat.

Part Number: QSV-8M0089715

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Quicksilver Thermostat Marine Replacement 59078Q3

Part Number: QSV-59078Q3

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Thermostat Kit for 1982 & older MerCruiser V8 engines with standard cooling systems and 1996 and older high performance MerCruiser engines

Part Number: QSV-807252Q3

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Thermostat for MerCruiser engines with standard cooling systems requiring the use of the 160°F thermostat.

Part Number: QSV-8M0109441

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Thermostat Kit 143°F fits Mercury/Mariner V6 135hp, V6 150hp, V6 175hp, and V6 200hp. Replaces Evinrude and Johnson OMC #434841.

Part Number: QSV-75692Q03

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Thermostat for MerCruiser sterndrive 8.2L Magnum and 8.2L EC MerCruiser inboard engines It is a 170°F thermostat.

Part Number: QSV-8M0045990

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Quicksilver Thermostat Marine Replacement 59078

Part Number: QSV-59078

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Thermostat fits 1983-2016 MerCruiser V-6 and V-8 engines with standard cooling requiring a 140-degree thermostat (except high perf engines).

Part Number: QSV-807252Q4

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Thermostat for MerCruiser engines 4.3L, 4.5L, 5.0L, 5.7L and 6.2L MPI Multi-Port Injection with dry joint exhaust and closed cooling systems

Part Number: QSV-864493

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Thermostat for Mercury 15-20hp EFI 2-cylinder outboards, model years 2017 and newer.

Part Number: QSV-8M0139434

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Thermostat for use on select 6-55hp Evinrude/Johnson and OMC outboards. Replaces OEM 434841, 378065, 393659 and Sierra 18-3553.

Part Number: QSV-8M6010302

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Quicksilver 8M6012540 THERM-YAM 115-225

Part Number: QSV-8M6012540

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Quicksilver 8M6012545 THERM-YAM/SUZ

Part Number: QSV-8M6012545

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Quicksilver 8M6012799 THERM-YAM

Part Number: QSV-8M6012799

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025

Thermostat is for select 115-300hp Yamaha 2-stroke and F115 4-stroke outboards. Replaces OEM 60V-12411-00-00, 68V-12411-00-00 and Sierra 18-3525.

Part Number: QSV-8M6010295

Not Yet Reviewed

Estimated Ship Date: Monday 11/3/2025