Your Cart

Sierra 18-3525 Marine Thermostat for Yamaha Outboards 122°F

Manufacturer

Sierra

Picture for manufacturer Sierra

Part Number

118-3525
9 reviews
04/21/2036 7:47 PM
Sale Price

$28.63

1 left at this price

delivery box

Usually delivered within 2 days

Add To Cart

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-3525 is a high-quality replacement thermostat designed specifically for Yamaha outboard motors. This precision-engineered component helps maintain optimal engine operating temperature for peak performance and longevity in marine environments.

Key Specifications:

  • Temperature Rating: 122°F / 50°C
  • Includes thermostat with grommet
  • Meets or exceeds OEM specifications
  • Engineered to withstand harsh marine conditions

Compatible Models:

  • F115/LF115 (2005-2014)
  • Z250/LZ250 (2003-2005)
  • LZ300/Z300 (2004-2006)
  • VZ200/VZ225/VZ250/VZ300 (2005-2009)

OEM Cross-Reference: Replaces Yamaha part numbers 60V-12411-00-00 and 68V-12411-00-00. Also interchangeable with Mercury part number 881429.

Sierra Marine is a trusted name in aftermarket marine engine parts, offering over 6,000 precision-engineered components backed by comprehensive warranty coverage. This thermostat is manufactured to Sierra's exacting standards for reliable temperature regulation in your Yamaha outboard cooling system.

Sender arms were long enough that I could bend arms to match oem.

Still waiting for credit on 1 of the charges to my credit card. Only ordered 1 was charged for 3. One was removed but still waiting to see if charge for 3rd one taken off credit card. No response as yet

The prop was exactly what i ordered. much thicker than my repaired prop has been.

No comment.

Amazing! I scoured the internet for a few days for a hard to find battery. I found it here for a few hundred dollars less & I received it the next day! I was blown away! I will use THMotorsports as a resource from here on! Thank you!

Was referred to by a fellow enthusiast from the Saleen Club Of America. Found exactly what I was looking for. Thanks Kevin

Very satisfied

VERY EASY TO ORDER AND CHECK OUT.

Best price right now on Bosch filters. Wish it was free shipping

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy