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Sierra 18-3541 Marine Thermostat for Yamaha Outboards

Manufacturer

Sierra

Picture for manufacturer Sierra

Part Number

18-3541
13 reviews
03/12/2036 10:47 PM
Sale Price

$25.71

3 left at this price

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Usually delivered within 2 days

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Product Details

The Sierra 18-3541 is a high-quality aftermarket replacement thermostat designed specifically for Yamaha 4-stroke outboard motors. This precision-engineered component maintains optimal engine operating temperature by regulating coolant flow, ensuring your outboard runs efficiently and reliably.

Key Features:

  • Temperature rating: 140°F / 60°C opening temperature
  • Manufactured to meet or exceed OEM specifications
  • Direct replacement for multiple Yamaha engine models
  • Fits Yamaha 4-stroke outboards from 2.5 HP to 100 HP
  • Compatible with F-Series, T-Series models from 1985-2005

OEM Cross-Reference Numbers:

  • Yamaha: 66M-12411-00-00, 66M-12411-01-00
  • Yamaha: 6G8-12411-00-00, 6G8-12411-01-00, 6G8-12411-02-00, 6G8-12411-03-00
  • Mallory: 9-43037

Sierra marine engine parts are engineered with premium materials and rigorous quality control to deliver reliable performance in harsh marine environments. This thermostat is an essential maintenance component for keeping your Yamaha outboard at the proper operating temperature and preventing overheating or inefficient warm-up cycles.

Note: Thermostat gasket sold separately. Always replace gaskets when installing a new thermostat to ensure proper sealing.

it was veryeay to order very good prices fast shipping

very quick checkout

Easy

good

Wow what a deal on mu Subaru husky liner floor mats and low shipping thanks Autoplicity

I am very glad that my order came in on time and in great condition!

Nice Store. Best price on the product I was looking for. Received my item within a week. But online order status wasn't updated until the day I received the item. I was ready to call the store to find out if something is wrong with my order. This part could be improved. Otherwise I'm happy and definitely be back in the future.

Great price and in stock, if shipping goes well, then stellar my review stays 5 stars.

I just received my order, I was expecting it on Saturday so that was a nice surprise. I will have to install it in my car and then finish my comments. Then I will let you know the rest of the story. Thank you.

Excellent Customer Service, returned an incorrect item immediately and helped me to get the correct one asap.<br><br>Thanks Autoplicity for doing the right thing always!!!

Great pricing on almost every product! Quick process and fast shipping! Will definitely order from Autoplicity again in the future.

Low prices. Tons of products.

Thanks

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