HOLIDAY ALERT

We will be closed on Wednesday, December 31st & Thursday, January 1st in observance of the New Year holiday.
Any orders placed after this time will be processed on Friday, January 2nd.

To all our customers - thank you for an amazing 2025!  Have a Happy New Year!

SHIPPING ALERT
Due to the expected winter storm affecting much of the country, some shipments may delayed throughout the next week.
We apologize for any inconvenience this may cause.

WE WANT TO HEAR FROM YOU!

We strive to make improvements that make it easier to serve your boating needs.
We’d like to know more about you and how we can do the best job possible for you.
Please take the time to complete this brief 3-5 minute survey to help us serve you better.

FREE Ground Shipping on Orders over $100!  Exceptions apply - see details.

Toggle Nav
  • Sign In
  • Create an Account
My Cart
Search
Menu
Account
Settings
Thermostats

Thermostats

Items 1-36 of 95

Set Descending Direction
View as Grid List
Page
  1. Thermostat Kit | Indmar 491010
    Thermostat Kit | Indmar 491010
    IND-491010
    Qty In Stock: 31
    MSRP: $60.25 $47.23
    Add to Wishlist
  2. Chrysler 0050082E Thermostat Housing Gasket
    Thermostat Housing Gasket | Chrysler 0050082E
    0050082E
    Qty In Stock: 86
    MSRP: $2.52 $2.52
    Add to Wishlist
  3. Large Image
    160 degree Thermostat & Sealing Ring | Sierra 18-3539
    SIERRA-18-3539
    Qty In Stock: 6
    MSRP: $54.79 $43.64
    Add to Wishlist
  4. Sierra 18-3644 160 Degree Thermostat Kit
    160 Degree Thermostat Kit | Sierra 18-3644
    SIERRA-18-3644
    Qty In Stock: 4
    MSRP: $36.59 $23.30
    Add to Wishlist
  5. Small Crusader R026007 Thermostat
    170 degree Thermostat | Crusader R026007
    CRU-R026007
    Qty In Stock: 56
    MSRP: $60.49 $60.49
    Add to Wishlist
  6. Thermostat | Quicksilver 8M0109441
    Thermostat | Quicksilver 8M0109441
    QS-8M0109441
    Qty In Stock: 6
    MSRP: $34.49 $29.49
    Add to Wishlist
  7. Small Image
    160 Degree Thermostat | Volvo Penta 3856961
    VOLVO-3856961
    Qty In Stock: 10
    MSRP: $40.00 $35.79
    Add to Wishlist
  8. Small Image
    Upper Thermostat Housing Gasket | Crusader RM0258A
    CRU-RM0258A
    Qty In Stock: 11
    MSRP: $4.55 $4.55
    Add to Wishlist
  9. Quicksilver 807252Q 3 Thermostat Kit
    Thermostat Kit | Quicksilver 807252Q3
    QS-807252Q3
    Qty In Stock: 8
    MSRP: $36.49 $30.99
    Add to Wishlist
  10. Small Image
    120 degree Thermostat | Sierra 18-3549
    SIERRA-18-3549
    Qty In Stock: 16
    MSRP: $30.39 $28.46
    Add to Wishlist
  11. Large Image
    160 Degree Thermostat Kit | Sierra 18-3670
    SIERRA-18-3670
    Qty In Stock: 4
    MSRP: $38.89 $24.80
    Add to Wishlist
  12. Volvo Penta 875795 Thermostat Kit
    Thermostat Kit | Volvo Penta 875795
    VOLVO-875795
    Qty In Stock: 0
    MSRP: $65.20 $61.42
    Add to Wishlist
  13. Small Image
    142 Degree Thermostat Kit | Sierra 18-3668
    SIERRA-18-3668
    Qty In Stock: 10
    MSRP: $48.99 $32.74
    Add to Wishlist
  14. Small Image
    Thermostat with O-Ring | Sierra 18-3615
    SIERRA-18-3615
    Qty In Stock: 19
    MSRP: $29.69 $21.45
    Add to Wishlist
  15. Small Image
    160 Degree Thermostat Kit | Sierra 18-3653
    SIERRA-18-3653
    Qty In Stock: 6
    MSRP: $40.19 $28.85
    Add to Wishlist
  16. Large Image
    Thermostat Sleeve | Quicksilver 23-47508T
    QS-23-47508T
    Qty In Stock: 5
    MSRP: $17.49 $14.49
    Add to Wishlist
  17. Small Image
    140 degree Thermostat | Volvo Penta 3853983
    VOLVO-3853983
    Qty In Stock: 7
    MSRP: $46.60 $42.54
    Add to Wishlist
  18. Small Image
    150 Degree Thermostat | Volvo Penta 3587597
    VOLVO-3587597
    Qty In Stock: 23
    MSRP: $32.60 $29.32
    Add to Wishlist
  19. Thermostat | Volvo Penta 22449828
    Thermostat | Volvo Penta 22449828
    VOLVO-22449828
    Qty In Stock: 4
    MSRP: $59.90 $57.45
    Add to Wishlist
  20. Small Image
    170 degree Thermostat Kit | Pleasurecraft Marine RP026003
    PCM-RP026003
    Qty In Stock: 7
    MSRP: $136.77 $136.77
    Add to Wishlist
  21. Volvo Penta 21613426 Thermostat
    Thermostat | Volvo Penta 21613426
    VOLVO-21613426
    Qty In Stock: 0
    MSRP: $206.00 $195.18
    Add to Wishlist
  22. Bombardier Recreational Products 383307 160 Degree Thermostat Assembly
    160 Degree Thermostat Assembly | Evinrude/Johnson 383307
    BRP-0383307
    Qty In Stock: 3
    MSRP: $33.99 $23.65
    Add to Wishlist
  23. Small Image
    160 Degree Thermostat | Sierra 18-3649
    SIERRA-18-3649
    Qty In Stock: 8
    MSRP: $29.89 $19.68
    Add to Wishlist
  24. Small Image
    Chrysler 160 Degree Thermostat | Sierra 18-3645
    SIERRA-18-3645
    Qty In Stock: 8
    MSRP: $30.69 $20.85
    Add to Wishlist
  25. Small Image
    Upper Thermostat Housing Gasket | Crusader RM0256
    CRU-RM0256
    Qty In Stock: 4
    MSRP: $4.05 $4.05
    Add to Wishlist
  26. Chrysler 4142888 Thermostat Housing Gasket
    Thermostat Housing Gasket | Chrysler 4142888
    4142888
    Qty In Stock: 38
    MSRP: $2.36 $2.36
    Add to Wishlist
  27. Chrysler 3675302K 160 Degree Thermostat Kit
    160 Degree Thermostat Kit | Chrysler 3675302K
    3675302K
    Qty In Stock: 21
    MSRP: $41.50 $79.30
    Add to Wishlist
  28. Quicksilver 807252Q4 Thermostat Kit
    Thermostat Kit | Quicksilver 807252Q4
    QS-807252Q4
    Qty In Stock: 16
    MSRP: $57.49 $48.99
    Add to Wishlist
  29. Volvo Penta 23521142 Thermostat
    Thermostat, Pack of 2 | Volvo Penta 23521142
    VOLVO-23521142
    Qty In Stock: 7
    MSRP: $245.00 $240.11
    Add to Wishlist
  30. Thermostat | Volvo Penta 21437904
    Thermostat | Volvo Penta 21437904
    VOLVO-21437904
    Qty In Stock: 0
    MSRP: $75.90 $74.37
    Add to Wishlist
  31. Thermostat | Volvo Penta 8149182
    Thermostat | Volvo Penta 8149182
    VOLVO-8149182
    Qty In Stock: 0
    MSRP: $147.00 $143.60
    Add to Wishlist
  32. EMP 23-05040 Thermostat Sleeve
    Mercruiser Thermostat Sleeve | EMP 23-05040
    EMP-23-05040
    Qty In Stock: 1
    MSRP: $12.99 $10.39
    Add to Wishlist
  33. Thermostat | Crusader R026009A
    Thermostat | Crusader R026009A
    CRU-R026009A
    Qty In Stock: 0
    MSRP: $55.52 $55.52
    Add to Wishlist
  34. 140 Degree Mercruiser Thermostat Kit | EMP 75-00401
    140 Degree Mercruiser Thermostat Kit | EMP 75-00401
    EMP-75-00401
    Qty In Stock: 5
    MSRP: $34.49 $27.60
    Add to Wishlist
  35. Small Image
    180 Degree Thermostat Kit | Sierra 18-3620
    SIERRA-18-3620
    Qty In Stock: 0
    MSRP: $82.19 $52.44
    Add to Wishlist
  36. Sierra 18-3662 145 Degree Thermostat Kit
    145 degree Thermostat Kit | Sierra 18-3662
    SIERRA-18-3662
    Qty In Stock: 1
    MSRP: $31.79 $20.28
    Add to Wishlist

Items 1-36 of 95

Set Descending Direction
View as Grid List
Page

Sorry, is not an active item in our system. However, we may still be able to help you. Please email us at support@marinepartssource.com or call us at (866)388-0390 for assistance. Please make sure to have the item number handy when you contact us.

My Wish List
Last Added Items
  1. Add to Cart
    Remove This Item
Go to Wish List
You have no items in your wish list.
© 2026 Marine Parts Source. All Rights Reserved.