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Brand: Sierra Marine
140 Degree Sierra Marine Thermostat for Mercruiser Stern Drive , white 18-3550
Sierra 18-3550 is a 140-degree marine thermostat for Mercruiser stern drive.
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140 Degree Sierra Marine Thermostat for Mercruiser Stern Drive , white 18-3550
Sierra 18-3550 Thermostat for Mercury/Mercruiser Inboard/Outboard Marine Engines.
It replaces Mercury 59078 and GLM 13020.
Temperature rating is 140 degrees.
Fits: 120 GM, 1982 to 1983 (Serial Range 5192049 THRU 6229717); 120 GM, 1983 to 1989 (Serial Range 6229718 THRU 0B531853); 140 GM, 1982 to 1983 (Serial Range 5157669 THRU 6229717); 140 GM, 1983 to 1989 (Serial Range 6229718 THRU 0B450800); 165 GM 250 I/L6, 1975 to 1978 (Serial Range 2770032 THRU 5178958); 2.5L GM, 1983 to 1989 (Serial Range 0B531854 THRU 0C856558); 3.0L GM, 1983 to 1989 (Serial Range 0B450801 THRU 0C856558); 3.0L GM, 1990 to 1995 (Serial Range 0C856559 THRU 0F353099); 3.0L GM, 1996 to 1998 (Serial Range 0L010042 THRU 0L096999); 3.0L GM, 1998 (Serial Range 0L097000 THRU 0W301999); 3.0LX GM, 1990 to 1995 (Serial Range 0C856559 THRU 0F603999); 3.0LX GM, 1997 to 1998 (Serial Range 0F604000 THRU 0K999999); 3.0LX GM 181 I/L, 1996 (Serial Range 0F604000 THRU 0K999999).
Key Features
Specifications
- Length
- 4.9 lb
- Width
- 3.95 lb
- Height
- 1.3 lb
- Weight
- 0.09 lb
- ASIN
- B00027H2F2
- UPC
- 030999315991
- Ships From
- United States
- Brand
- Sierra Marine
Frequently Asked Questions
About 140 Degree Sierra Marine Thermostat for Mercruiser Stern Drive , white 18-3550
01 What is the temperature rating of the Sierra 18-3550?
The temperature rating is 140 degrees.
02 What does the Sierra 18-3550 replace?
It replaces Mercury 59078 and GLM 13020.
03 What engines does the Sierra 18-3550 fit?
It fits various Mercruiser and GM engines from 1982 to 1998.
04 What is the ASIN for this product?
The ASIN for this product is B00027H2F2.
05 What is the UPC / barcode for this product?
The UPC/barcode for this product is 030999315991.
06 Where does this ship from?
Orders ship from our fulfillment center in Dover, Delaware, USA.
07 How many days will it take to arrive?
Orders ship within 1-2 business days and typically arrive within 4-5 business days via free standard shipping -- usually by Sep 4.
08 Does this product accept returns?
Yes -- this item can be returned within 15 days of delivery for a free return by mail. See our return policy for full details.

