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Sierra
Sierra Thermostat #18-3615
$27.33
$32.62
Sierra 18-3615 Thermostats & PartsSierra Thermostat 18-3615OEM Interchange:VOLVO: 3587597Sierra Thermostat 18-3615Normalized SKU: 183615UPC Code: 808282270582
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Sierra
Sierra Thermostat Kit #18-3666D
$36.04
$43.01
Sierra 18-3666D Thermostats & PartsSierra Thermostat Kit #18-3666DCooling: ThermostatsSierra Thermostat Kit #18-3666DNormalized SKU: 183666DUPC Code: 808282229467
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Sierra
Sierra Thermostat Kit #18-3609
$32.72
$39.05
Sierra 18-3609 Thermostats & PartsSierra Thermostat Kit #18-3609Cooling: ThermostatsSierra Thermostat Kit #18-3609Normalized SKU: 183609UPC Code: 808282256821
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Sierra
Sierra Thermostat Kit #18-3606D
$21.20
$25.31
Sierra 18-3606D Thermostats & PartsSierra Thermostat Kit #18-3606DCooling: ThermostatsSierra Thermostat Kit #18-3606DNormalized SKU: 183606DUPC Code: 808282256791
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Sierra
Sierra Thermostat Kit #18-3608D
$11.22
$13.39
Sierra 18-3608D Thermostats & PartsSierra Thermostat Kit #18-3608DCooling: ThermostatsSierra Thermostat Kit #18-3608DNormalized SKU: 183608DUPC Code: 808282256814
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Sierra
Sierra Thermostat Kit #18-3609D
$3.20
$3.76
Sierra 18-3609D Thermostats & PartsSierra Thermostat Kit #18-3609DCooling: ThermostatsSierra Thermostat Kit #18-3609DNormalized SKU: 183609DUPC Code: 808282256876
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Sierra
Sierra Thermostat #18-3541
$37.80
$45.12
Sierra 18-3541 Thermostats & PartsSierra Thermostat #18-3541OEM Interchange:YAMAHA: 66M-12411-01-00Cooling: ThermostatsSierra Thermostat #18-3541Normalized SKU: 183541UPC Code: 808282265526
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Sierra
Sierra Thermostat Kit #18-3605
$9.04
$10.79
Sierra 18-3605 Thermostats & PartsSierra Thermostat Kit #18-3605Cooling: ThermostatsSierra Thermostat Kit #18-3605Normalized SKU: 183605UPC Code: 808282265861
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Sierra
Sierra Thermostat #18-3544
$30.49
$36.39
Sierra 18-3544 Thermostats & PartsSierra Thermostat #18-3544OEM Interchange:OMC: 435491Cooling: ThermostatsSierra Thermostat #18-3544Normalized SKU: 183544UPC Code: 808282227555
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Sierra
Sierra Thermostat Kit #18-3539
$56.52
$67.82
Sierra 18-3539 Thermostats & PartsSierra Thermostat Kit #18-3539OEM Interchange:VOLVO: 3831426Cooling: ThermostatsSierra Thermostat Kit #18-3539Normalized SKU: 183539UPC Code: 808282265854
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Sierra
Sierra Thermostat #18-3536
$40.07
$48.08
Sierra 18-3536 Thermostats & PartsSierra Thermostat #18-3536OEM Interchange:MERCURY MARINE: 833072003Cooling: ThermostatsSierra Thermostat #18-3536Normalized SKU: 183536UPC Code: 808282241230
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Sierra
Sierra Thermostat #18-3537
$2.92
$3.44
Sierra 18-3537 Thermostats & PartsSierra Thermostat #18-3537OEM Interchange:MERCURY MARINE: 833072004Cooling: ThermostatsSierra Thermostat #18-3537Normalized SKU: 183537UPC Code: 808282241223
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Sierra
Sierra Thermostat #18-3535
$100.31
$124.52
Sierra 18-3535 Thermostats & Parts
Sierra Thermostat #18-3535
Temperature Rating: 130°F (54°C)
OEM Interchange:MERCURY MARINE: 885599004
Cooling: Thermostats
Normalized SKU: 183535UPC Code: 808282241216
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Sierra
Sierra Thermostat Kit #18-3538
$7.40
$8.70
Sierra 18-3538 Thermostats & PartsSierra Thermostat Kit #18-3538OEM Interchange:VOLVO: 3831424Cooling: ThermostatsSierra Thermostat Kit #18-3538Normalized SKU: 183538UPC Code: 808282265519
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Sierra
Sierra Thermostat Gasket #18-2947
$1.82
$2.14
Sierra 18-2947 Thermostats & PartsSierra Thermostat Gasket #18-2947OEM Interchange:OMC: 310913Sierra Thermostat Gasket #18-2947Normalized SKU: 182947UPC Code: 030999314475
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Sierra
Sierra Thermostat Gasket #18-2933
$1.09
$1.28
Sierra 18-2933 Thermostats & PartsSierra Thermostat Gasket #18-2933OEM Interchange:VOLVO: 1317466VOLVO: 416033Sierra Thermostat Gasket #18-2933Normalized SKU: 182933UPC Code: 030999314376
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Sierra
Sierra Thermostat Gasket #18-2917
$3.94
$4.64
Sierra 18-2917 Thermostats & PartsSierra Thermostat Gasket #18-2917OEM Interchange:GM: 3701777MERCURY MARINE: 27-530451OMC: 312797Sierra Thermostat Gasket #18-2917Normalized SKU: 182917UPC Code: 808282258559
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Sierra
Sierra Thermostat Gasket #18-2858
$4.11
$4.84
Sierra 18-2858 Thermostats & PartsSierra Thermostat Gasket #18-2858OEM Interchange:OMC: 314809VOLVO: 3852127Sierra Thermostat Gasket #18-2858Normalized SKU: 182858UPC Code: 030999313652
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Sierra
Sierra Thermostat Gasket #18-2844
$2.02
$2.38
Sierra 18-2844 Thermostats & PartsSierra Thermostat Gasket #18-2844OEM Interchange:MERCURY MARINE: 27-488181Sierra Thermostat Gasket #18-2844Normalized SKU: 182844UPC Code: 808282258191
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Sierra
Sierra Thermostat Gasket #18-2843
$6.85
$8.06
Sierra 18-2843 Thermostats & PartsSierra Thermostat Gasket #18-2843OEM Interchange:MERCURY MARINE: 27-74830Sierra Thermostat Gasket #18-2843Normalized SKU: 182843UPC Code: 030999313515
Frequently Asked Questions
First Choice Marine is an online marine retailer carrying a diverse line of marine parts and accessories and related items from industry-respected and demanded manufacturers and suppliers. Through our diverse distributor network, we are able to access over 150,000 items, including our current site inventory, new products being added, and special order items. If you need it on your boat... we are your one-stop shop!
Yes, we offer FREE Shipping on most orders over $149 to US-48*.
Each product displays a shipping status message, just above the item price. Below is the meaning for each of these codes.
- Qualifies for Free Shipping: This item qualifies for free shipping when the order is $149+
- Qualifies for Free Ground Shipping: This item qualifies for free ground shipping when the order is $149+.
- Oversized - Not Qualified for Free Shipping: This item is too large/heavy to qualify for free shipping
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The quantity on hand is updated as inventory events happen and matches what we have available. If you have urgent needs and we are close to what you need, contact us, and we can confirm stock.
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If you need to return an item, please follow the guidelines here so we can process a prompt refund and assist you in finding the correct item.
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