SKU: 64679990701

875796 Thermostat for Volvo Penta MD2 MD6 MD6A MD6B MD7 MD7A MD7B AQ120 AQ125 AQ140 BB140 | JLM Marine

Sale price$30.56 Regular price$33.95
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Description

875796 Thermostat for Volvo Penta MD2 MD6 MD6A MD6B MD7 MD7A MD7B AQ120 AQ125 AQ140 BB140 | JLM MarineThermostat for Volvo Penta MD2 MD6 MD6A MD6B MD7 MD7A MD7B AQ120 AQ125 AQ140 BB140 This high quality aftermarket thermostat is engineered to fit Volvo Penta marine diesel engines, including the MD2, MD6A, MD6B, MD7A, MD7B series, as well as AQ120, AQ125, AQ140, and BB140 models. Designed to maintain optimal operating temperature, this thermostat ensures reliable engine performance and longevity in demanding marine environments. This thermostat

Thermostat for Volvo Penta MD2 MD6 MD6A MD6B MD7 MD7A MD7B AQ120 AQ125 AQ140 BB140

This high-quality aftermarket thermostat is engineered to fit Volvo Penta marine diesel engines, including the MD2, MD6A, MD6B, MD7A, MD7B series, as well as AQ120, AQ125, AQ140, and BB140 models. Designed to maintain optimal operating temperature, this thermostat ensures reliable engine performance and longevity in demanding marine environments.

This thermostat directly replaces OEM part numbers 875796 and 833366, providing a cost-effective solution without compromising on quality or fitment.

  • Complete thermostat service kit for straightforward replacement
  • Precision-engineered to meet OEM specifications
  • Suitable for Volvo Penta diesel marine engines

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Volvo Penta 875796
Volvo Penta 833366

Compatible Engine Models

Confirm your engine model/year in the table below.

Brand Model
Volvo Penta MD2
Volvo Penta MD6A
Volvo Penta MD6B
Volvo Penta MD7A
Volvo Penta MD7B
Volvo Penta AQ120
Volvo Penta AQ125
Volvo Penta AQ140
Volvo Penta BB140

Technical Specifications

Specification Value
Product Type Thermostat Service Kit
Application Volvo Penta Marine Diesel Engines
OEM Part Number 875796, 833366

Package Contents

Your purchase includes the following components:

  • 1 × Thermostat Service Kit

Installation Guide

  1. Ensure the engine is completely cool before beginning any work. Disconnect the battery to prevent accidental starting.
  2. Drain the cooling system by opening the drain plug or removing the lower hose. Collect coolant in a suitable container.
  3. Locate the thermostat housing on your Volvo Penta engine. It is typically mounted on the cylinder head or block.
  4. Remove the bolts or clamps securing the thermostat housing cover. Carefully lift off the cover.
  5. Extract the old thermostat from its seat. Note the orientation of the thermostat before removal.
  6. Clean the mating surfaces of the housing and cover thoroughly, removing all old gasket material and debris.
  7. Install the new thermostat in the correct orientation (spring side typically faces the engine block). Ensure it seats properly.
  8. Place a new gasket or O-ring on the housing if included in the kit. Apply a thin layer of sealant if recommended by the manufacturer.
  9. Reinstall the thermostat housing cover and tighten the bolts evenly to the manufacturer's specified torque.
  10. Refill the cooling system with the correct type and mixture of coolant as specified in your engine manual.
  11. Reconnect the battery and start the engine. Allow it to reach operating temperature while checking for leaks around the thermostat housing.
  12. Check coolant level after the engine has cooled and top off if necessary. Verify proper thermostat operation by monitoring engine temperature.

Troubleshooting & FAQ

Q: How do I know if my thermostat needs replacement?
A: Common signs include engine overheating, running too cool (not reaching normal operating temperature), erratic temperature gauge readings, or coolant leaks around the thermostat housing. If your engine takes longer than usual to warm up or runs hotter than normal, the thermostat may be stuck open or closed.

Q: Will this thermostat fit my specific Volvo Penta engine model?
A: This thermostat is designed to fit MD2, MD6A, MD6B, MD7A, MD7B, AQ120, AQ125, AQ140, and BB140 models. Cross-reference your current part number (875796 or 833366) with our listing and verify the physical appearance matches your original component before ordering.

Q: How often should I replace my marine engine thermostat?
A: Thermostats should be inspected during routine cooling system maintenance and typically replaced every 3–5 years or according to your engine manufacturer's service schedule. If you experience cooling system issues or the thermostat shows signs of corrosion or damage, replace it immediately regardless of age.

Q: What is the difference between this aftermarket thermostat and the OEM part?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 64679990701

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Amazon Customer
Omaha, US
★★★★★ 4
Great performance but low grade material.
Color: 26Inch light White +Wiring Harness, Color: 26Inch light White +Wiring Harness
I want to give it 5 stars but I can't because: The light bar is extremely bright and they go a great distance. I am very satisfied with how much it puts out. 5 out of 5 stars for its performance. HOWEVER nilight seems like they're starting to go cheap with their build material. 2 out of 5 stars for that. I have added photos of the older material vs new material for reference. Their old material is 3.3mm thickness compared to their new material at 2.7mm thickness. And that's for the mounting brackets and the light bar housing. It doesn't seem like .6mm would be a big deal but it's noticeably less rigid. Hand tight started bending the metal. Great product for sure but build material is low grade. Not trying to knock them, I love nilight products and will keep using them but it seems like they trying to save money by cutting weight which makes it less rigid. Dings and scratches come easily now. It worries me a little bit if it can take the abuse of vibrations over time from driving around now.
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Reviewed in the United States on February 19, 2026
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Richard M
Carnegie, US
★★★★★ 5
It will light up your life
Color: 26Inch Light White w/Wiring Harness
I only got to use them once before my jeep was totaled. They’re super bright. Great build quality. It survived taking a header down a mountain side and rolling 4 times. When the jeep was recovered, the light bar still worked!!
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Reviewed in the United States on December 16, 2025
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Adam
Natrona Heights, US
★★★★★ 5
Great light - very bright.
Color: 26Inch Light White
Installed on a Bronco. It wasn't designed for a Bronco, but I was able to mount it after a trip to hardware store and some minor modifications. The quality of the light itself seems good. Time will tell how long it lasts. It definitely lights up the road and is worth the price.
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Reviewed in the United States on May 25, 2025
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Jordan Grimsrud
Louisville, US
★★★★★ 5
Affordable and bright!
Color: 26Inch Light White, Color: 26Inch Light White
I wish I could've done more of a review, but the videos won't do it justice from my phone. I wanted more takedown light capabilities on my vehicle, so I attached it to my Setina bumper. It is pretty versatile in how it can be installed. The way I am showing it is actually upside down from how most people would mount it. On the roadway, the light does not disappoint. It provides adequate lighting both to the front of your vehicle and reaching out via floodlights. For the price of the light bar and wiring options, you really cannot beat Nilight as an entry into LED lighting. If you reading this review wanting to know if you should "pull the trigger" and buy it, then you should, you won't be disappointed. Now I have only just bought this light, and haven't had it very long. Winter is approaching, and with that, we shall see if it withstands the weather. However, if it doesn't, Nilight has a two-year warranty on their products, which is also good to have peace of mind about your lightbar. Again light I said, if you're like me and wondering which lightbar to get, Nilight is a fantastic option and you won't be let down. Thanks for taking the time to read my review.
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Reviewed in the United States on September 29, 2020
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EternianUber
Dallas, US
★★★★★ 5
Nice unit
Set name: 5.1 Receiver
I'm really happy with this receiver even though I don't have any speakers hooked up to it. Not using it for a speaker setup might sound like a waste of a product to some people but honestly I'm finding plenty of value in it with it's other features. The main reason I looked into getting a receiver was so I could have multiple hdmi devices hooked up to my monitor. I looked into hdmi hubs but there are a couple reasons why I've chosen a receiver instead. 1. Reliability and ease of use. Ok, so like I said I use a monitor in my room, not a tv. Monitors don't have remotes so anytime I want to change the volume or hdmi input I have to do it manually. It's a 32 inch monitor about 3 feet to the side of my bed and it's a nice arms stretch to do so. Not a big deal and while there are plenty of hdmi hubs that offer remote changing or automatic changing I worry about the reliability of those devices. There are plenty of reviews that state their hubs stop working after some months or the automatic hdmi switching starts changing inputs randomly or getting black screens and such. I just didn't want to hassle with things like that. 2. Bluetooth connectivity. This was another feature that I was looking into. Again, there are separate devices that offer this but just like hdmi hubs you will find plenty of reliability concerns. On top of that there's audio lag and previously when I bought a bluetooth transmitter I had to return it for that reason. Nice thing about this receiver is there is an adjustment for the audio to increase or decrease the audio timing but luckily it isn't an issue and the audio seems to be timed perfectly with my bluetooth headphones. It pairs up quickly too. I haven't tried the 4k upscaling with this receiver because I use a 1440p monitor but it's nice to know that it's there. Maybe in the future I will find a use for it. There's also some neat audio presets for things like movies, music and gaming. It's actually a pretty extensive list. I suppose I should also mention that each hdmi input can be named to your liking for a nice customization feel so when you flip through them you know exactly what's connected to that input. You can even use the hdmi ports when the unit is in standby mode but you won't be able to use the bluetooth connectivity. In the end I think this was a good purchase. It's priced reasonably and I'm getting good use out of it. Sound quality is great and the customizable features are a definite plus. More expensive than getting an hdmi hub and bluetooth transmitter but I think the reliability and extra features make up for this.
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Reviewed in the United States on July 23, 2019

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