# 435491 Evinrude Johnson Thermostat | Genuine OEM BRP Outboard Part

## 🔧 Product Description

**Genuine BRP Evinrude Johnson 62°C / 143°F Thermostat Assembly - Part Number: 0435491**

A genuine BRP cooling-system thermostat for selected Johnson and Evinrude V4 and V6 two-stroke outboards.

The thermostat remains closed during initial warm-up and begins opening near its calibrated temperature, allowing cooling water to circulate through the cylinder block while maintaining sufficient engine temperature for clean combustion and stable running.

## ⚙️ Key Features

-   Genuine BRP thermostat assembly
-   Correct OEM reference 0435491
-   Approximately 62°C / 143°F opening specification
-   Used on selected looper V4 and V6 engines
-   Sierra, GLM and Recmar replacements available

## 🚤 Compatibility

### Commonly used on

-   Johnson and Evinrude loop-charged V4 engines
-   Selected 60-degree and 90-degree V6 engines
-   Cooling systems using thermostat 0435491

### Typically suits

-   Engine models:
-   Evinrude 75HP - selected 2002-2003 models
-   Evinrude / Johnson 90HP V4 - approximately 1995-2004
-   Evinrude / Johnson 100HP - approximately 1998-2006
-   Johnson 105 Jet - selected 2003 applications
-   Evinrude / Johnson 110HP - selected 2004-2006 models
-   Evinrude / Johnson 115HP - approximately 2002-2006
-   Johnson / Evinrude 120HP - approximately 1985-1994
-   Evinrude / Johnson 150HP - selected 1991-2006 models
-   Evinrude / Johnson 175HP - selected 1991-2006 models
-   HP Range: Approximately 75HP - 175HP
-   Engine Type: V4 and V6 two-stroke outboard
-   Year Range: Approximately 1985-2006, dependent on model

## 🔌 Function

The thermostat regulates cooling-water flow so the engine warms promptly but receives increased circulation as cylinder-head temperature rises.

## ⚠️ Common Signs of Failure

-   Engine overheats because the thermostat remains closed
-   Engine runs excessively cold
-   Poor idle quality after prolonged operation
-   Excessive fuel consumption or carbon formation
-   Thermostat is corroded or covered in salt deposits
-   Poppet does not move when heated
-   Thermostat seal leaks
-   Temperature differs noticeably between cylinder banks

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   0435491 current or later thermostat reference
-   0765559 related BRP service thermostat reference

### OEM / Related Numbers

-   0435491
-   435491
-   0765559
-   765559
-   Thermostat seal and cover must be matched to the engine model

### Aftermarket / Verified Equivalents

-   Sierra: 18-3544
-   GLM: 13130
-   Recmar: REC435491
-   Aftermarket thermostats sold under 435491 / 765559

## 📦 Condition

-   Genuine BRP part
-   Brand new
-   Supplied in original or equivalent packaging

## Details

- **Price:** 60.12 AUD
- **Vendor:** BRP (Evinrude/Johnson)
- **Type:** Cooling System
- **Tags:** BRP (Evinrude/Johnson)

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 60.12 AUD | In stock |

## Images

- 435491 Evinrude Johnson Thermostat | Genuine OEM BRP Outboard Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/435491-thermostat)
> Updated: 2026-09-05