EMP Brass Thermostat Kit 75-00403-BR, Replaces 75692, Fits Mercury V135/V150 Outboards

The EMP 75-00403-BR is a brass thermostat kit built for Mercury V135 and V150 outboard engines. The kit pairs a brass thermostat with a matching thermostat gasket so the cooling system's temperature-regulating component and its seal are replaced together in one job, rather than tracking down each part separately. Brass construction resists the corrosion that raw-water cooling passages are prone to, helping the thermostat hold its calibration over repeated heat cycles.

This kit is designed as a direct fit for the Mercury outboard models and serial-number ranges listed below, and the included thermostat and gasket cross to the original equipment part numbers also listed below, so it can be used as a like-for-like replacement during a routine cooling-system service or when a thermostat is stuck open, stuck closed, or has failed diagnostic testing.

Specifications

• Brand: EMP
• Manufacturer Part Number: 75-00403-BR
• Kit Contents: Thermostat (18-3553) and Thermostat Gasket (18-0182)
• Thermostat Material: Brass
• Thermostat OEM Cross-Reference: 75692
• Gasket OEM Cross-Reference: 27-62386
• Weight: 0.062 pounds

Fitment

• Mercury V135, serial number A904646 and up
• Mercury V150, serial number A904646 and up
• Mercury V150 XR4, serial numbers C239553 and C159199
• Mercury V150 XR6, serial number D082000 and up
• Mercury V150 MAGII, serial numbers C239553 and 4571651

Replaces (OEM)

• 75692 (thermostat)
• 27-62386 (thermostat gasket)

Frequently Asked Questions

What is included in the EMP 75-00403-BR thermostat kit? The kit contains a brass thermostat (18-3553) and a matching thermostat gasket (18-0182), giving you both parts needed to complete a thermostat replacement in one purchase.

What is the EMP 75-00403-BR made of? The thermostat in this kit is made of brass, which resists corrosion in raw-water cooling passages better than many alternative materials.

Which Mercury outboard engines does this thermostat kit fit? The 75-00403-BR fits Mercury V135 and V150 outboards (serial number A904646 and up), as well as V150 XR4, V150 XR6 (serial number D082000 and up), and V150 MAGII models.

Does the EMP 75-00403-BR cross-reference to an OEM part number? Yes, the brass thermostat in this kit replaces OEM number 75692, and the included gasket replaces OEM number 27-62386.

How much does the 75-00403-BR thermostat kit weigh? The EMP 75-00403-BR weighs 0.062 pounds.

Is the gasket included, or does it need to be purchased separately? The thermostat gasket (18-0182) is included with the EMP 75-00403-BR kit, so no separate gasket purchase is needed.

What serial number range applies to the V150 XR4 fitment? For the V150 XR4, the EMP 75-00403-BR is listed against serial numbers C239553 and C159199.

What serial number range applies to the V150 XR6 fitment? The V150 XR6 fitment for the 75-00403-BR applies to serial number D082000 and up.

Can this kit be used to fix an overheating Mercury outboard? A stuck-closed or failed thermostat is a common cause of outboard overheating, and the EMP 75-00403-BR brass thermostat and gasket kit is intended to replace that component on compatible Mercury V135/V150 engines.

Is 75-00403-BR an aftermarket or genuine Mercury part? The 75-00403-BR is an EMP-brand replacement kit engineered to cross-reference to OEM numbers 75692 and 27-62386 rather than a genuine Mercury-branded part.

Does the V150 MAGII use the same thermostat kit as the standard V150? Yes, the V150 MAGII (serial numbers C239553 and 4571651) is listed as a compatible fitment for the EMP 75-00403-BR kit.