# 5033721 Evinrude Johnson Water Thermostat 60 Deg | Genuine OEM BRP Outboard Part

🔧 Product Description

  

Genuine BRP Evinrude Johnson 60°C Water Thermostat - Part Number: 5033721

  

A genuine BRP cooling-system thermostat for selected Suzuki-built Johnson four-stroke outboards.

  

The thermostat begins regulating coolant flow at approximately 60°C or 140°F. It remains closed while the engine warms, then opens progressively to control water circulation through the cylinder block and cylinder head.

  

Maintaining the correct operating temperature supports stable fuel delivery, combustion efficiency, lubrication and corrosion control.

  

⚙️ Key Features

  

• Genuine BRP Evinrude Johnson OEM thermostat

• Correct OEM part number 5033721

• 60°C / 140°F temperature rating

• Used on selected Johnson four-stroke outboards

• Spring-loaded wax-pellet thermostat design

• Direct replacement where 5033721 or 0769254 is specified

• Sierra, Recmar and Suzuki-format alternatives available

  

🔄 Supersession & Cross Reference

  

OEM / Related Numbers:

  

• 5033721

• 05033721

• 0769254

• 769254

• Suzuki: 17670-90J00

• Suzuki: 17670-90J01

• Yamaha-format reference: 67F-12411-01

• MerCruiser-format reference: 855676004

• OEM Description: Thermostat, 60°C

• Alternate Description: Thermostat, 140°F

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-3632

• Recmar: REC67F-12411-01

• Marine Energy Systems / WA: 67F-12411-01

• Pro Marine: 67F-12411-01 / 17670-90J00 replacement

• Generic 60°C thermostat replacing 5033721 and 17670-90J00

  

Aftermarket fitment note:

  

• Equivalent thermostats may be catalogued primarily under Suzuki or Yamaha-format numbers.

• Confirm the outside diameter, flange profile, sealing ring and 60°C rating before installation.

  

🚤 Compatibility

  

Commonly used on selected:

  

• Johnson 90HP four-stroke outboards

• Johnson 115HP four-stroke outboards

• Johnson 140HP four-stroke outboards

• Johnson 225HP four-stroke outboards

• Suzuki-built Johnson four-stroke engine families

• Thermostat housings whose parts diagram specifies 5033721

  

Verified catalogue examples include:

  

• 2003 Johnson 115HP four-stroke models

• 2004 Johnson 90HP four-stroke models

• 2004 Johnson 225HP four-stroke models

• J140 and BJ140 engine families using the 60°C thermostat

  

Important fitment note:

  

• Some engines use one thermostat while larger V6 engines may use two.

• Order the quantity shown in the engine's cooling-system diagram.

• Do not substitute the optional 71°C thermostat used in some Suzuki applications.

• Thermostat gasket, cover seal and fasteners are included only when specifically shown or stated.

  

🔌 Function

  

The thermostat restricts cooling-water flow during warm-up and opens as coolant temperature rises.

  

A thermostat stuck open can keep the engine too cold. A thermostat stuck closed can restrict circulation and cause overheating.

  

Common signs of thermostat failure:

  

• Engine overheats at idle or under load

• Engine takes too long to reach operating temperature

• Uneven cylinder-bank temperatures

• Warning horn or over-temperature fault

• Salt or mineral deposits around the thermostat

• Thermostat remains open when cold

• Thermostat does not open in heated water

• Corrosion damages the spring or frame

• Poor running caused by an engine remaining excessively cold

  

Installation considerations:

  

• Confirm the 60°C rating

• Inspect the thermostat cover and sealing groove

• Install a new gasket or sealing ring where required

• Remove salt and corrosion without damaging the housing

• Test the old thermostat in controlled heated water if diagnosis is uncertain

• Confirm that the replacement begins opening at the specified temperature

• Flush the cooling system if heavy mineral deposits are present

• Check tell-tale flow and operating temperature after installation

  

📦 Condition

  

• Genuine BRP Evinrude Johnson OEM part

• Brand new

• Supplied in genuine or equivalent protective packaging

## Details

- **Price:** 100.21 AUD
- **Vendor:** BRP (Evinrude/Johnson)
- **Tags:** Evinrude Johnson Outboard Parts | BRP Marine Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 100.21 AUD | In stock |

## Images

- 5033721 Evinrude Johnson Water Thermostat 60 Deg | Genuine OEM BRP Outboard Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/5033721-evinrude-johnson-water-thermostat-60-deg-cel)
> Updated: 2026-07-12