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Thermostat Kit Replaces Sierra 18-3650 18-3550 59078Q3 59078T3 Replacement for Mercury/Mercruise 140 Degree

4.4 (4) Write Review
Free shipping on orders over $29.99

$16.99

$ 8 .99 $8.99

In Stock
  • Aftermarket thermostat.replaces GLM 13370; Mallory 9-43153
  • Package includes 1 x Thermostat,1 x Thermostat Cover Gasket
  • 140°F degree thermostat
  • Durable Construction,providing reliable performance and long service life
  • Fits 1998 & older MCM GM in-line 4 & 6 cyl. Engines


Aftermarket Thermostat Kit Replaces Sierra 18-3650 18-3550 59078Q3 59078T3


john a mize
Reviewed in the United States on May 24, 2025
fit and worked as it should
TheCowmasher
Reviewed in the United States on March 26, 2025
Omc cobra 86-93Small thermostat for v8. Working great!!
Robert McCleskey
Reviewed in the United States on February 5, 2024
Great price
Dean Parker
Reviewed in the United States on December 22, 2023
Everything was fine, it fit as described and worked well