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Evinrude Johnson 90-175hp Thermostat - 143 Degrees Fahrenheit (OST435)

Genuine Part # : 435491, 0435491, 18-3544

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  • 1 YEAR


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Thermostat opens at 143 degrees fahrenheit.

This part replaces part #: 435491, 0435491 18-3544.

This part suits the following engines: Evinrude Johnson 90hp 1995-2006, Evinrude Johnson 115hp 1995-2006, Evinrude Johnson 150hp 1993-2006, Evinrude Johnson 175hp 1993-2006.


About The Brand

Outboard Spares brand of parts are tested in Australia's harsh marine environment with a focus on quality and durability. Outboard Spares parts are used by professional fishermen who depend on their parts to stay on the water and in business. So next time you service your engine choose what the professionals use, choose Outboard Spares.

  • Standard Shipping is free on all orders. Oils & Lubricant products can only be sent via Standard Shipping.
  • Express Shipping is $10 flat rate.
  • Pick up is available from our warehouse at 1/84 Brunel Road, Seaford VIC 3198 between the hours of 8:30am to 3:30pm weekdays. You will be notified by email when your order is ready for pick up.

Delivery Time

Orders are dispatched same business day if ordered before 3:00pm AEDT. All orders are dispatched from Melbourne, Victoria and are sent via Australia Post.

For delivery time estimates with Australia Post please use their delivery calculator here:

If you have any questions relating to shipping, please contact us by emailing

Johnson/ Evinrude 90/115 60° V Thermostat

By: on 17 January 2020
Replaced two of above. Removed them. One rattled so it was the faulty one. Plastic threaded covers are destroyed when removed. Unavoidable if aged. Use a little stag paste and $1 O-rings from hardware store. Genuine too dear for a bit of rubber. Installed and now runs perfectly.

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