Mr. Cool is a manufacturer and distributor of over 15,000 OEM replacements for hundreds of Original Equipment Manufacturers. Products include:
- Heat Exchangers
- Oil Coolers
- Aftercoolers
- Truck radiators
We specialize in marine engine cooling and can assist with new designs, custom designs or redesigns of your current configuration. If you have an old craft you want functioning like new or a recent build and a bit of bad luck, we can assist with it all. Recently we’ve included Fresh Water Cooling kits amongst our offerings which allows us to cool a variety of small block engines that may not have come from the OEM that way.
Well-known and respected for our customer service we have grown steadily over the last 20 years as a leader in the industry. We have proven to be your reliable source for engine cooling products including Barr Exhaust Systems as well.
Major OEM products we replace include:
- Mercruiser / Mercury®
- Volvo®
- Caterpillar®
- Cummins®
- Onan® Generators
- Westerbeke® Generators and propulsion engines
- Kohler®
- SeaKeeper®
You can see if we have your part by searching our product database by clicking here. If not, Contact Mr. Cool today to learn what we can do for you at 248-960-7850 OR 866-726-2665.
3,270 Verified Customer Reviews
3,270 Customer Ratings and Reviews
Shopper Approved collects trusted reviews from customers who have made a verified purchase.
4.8
Overall Star
Rating
About this Company
Mr. Cool is a manufacturer and distributor of over 15,000 OEM replacements for hundreds of Original Equipment Manufacturers. Products include:
- Heat Exchangers
- Oil Coolers
- Aftercoolers
- Truck radiators
We specialize in marine engine cooling and can assist with new designs, custom designs or redesigns of your current configuration. If you have an old craft you want functioning like new or a recent build and a bit of bad luck, we can assist with it all. Recently we’ve included Fresh Water Cooling kits amongst our offerings which allows us to cool a variety of small block engines that may not have come from the OEM that way.
Well-known and respected for our customer service we have grown steadily over the last 20 years as a leader in the industry. We have proven to be your reliable source for engine cooling products including Barr Exhaust Systems as well.
Major OEM products we replace include:
- Mercruiser / Mercury®
- Volvo®
- Caterpillar®
- Cummins®
- Onan® Generators
- Westerbeke® Generators and propulsion engines
- Kohler®
- SeaKeeper®
You can see if we have your part by searching our product database by clicking here. If not, Contact Mr. Cool today to learn what we can do for you at 248-960-7850 OR 866-726-2665.
Today , FL
A++++ products and service. Thanks a lot
Today , WA
VERY COOL!
Today , NY
quick and easy
1 day ago , CA
Worked ok
2 days ago , CA
They originally sent only one cooler istead of two but they overnighted the second one since they made the error.

2 days ago
.
2 days ago , FL
Mr. Cool had the part that I needed and it was sent next day.

2 days ago
CUSTOMER CALLED AND SAID THAT HE DOESN'T NEED IT NOW AS HE IS GETTING A NEW GENERATOR.
2 days ago , FL
tanks for all
2 days ago , FL
Very friendly service and quality product!
2 days ago , SC
Quick and easy
4 days ago , MI
Glad I found you, I will always come to you guys for any cooling parts I may need. Just wish the shipping would be less for us local Mi. Folks as I live like 40 minutes from where you guys are located.

4 days ago
I can’t say as to wether it fits as I have to installed it yet, or if it cools properly because it’s not installed and the boats out of the water for the rest of the year , and I never talked to a sales rep. BUT! I will say I know I have the correct part, so it should fit, everything looks well made so I’m assuming it will cool properly and I’m a prettier good sales rep and I’m confident the parts going to make me happy.
4 days ago , CA
Great product
5 days ago , FL
Very easy to order
5 days ago , MO
PAINLESS ONLINE SHOPPING
5 days ago , FL
It was easygoing.
5 days ago , MO
Gentleman helped me identify right part and told which shipping method to get it when i needed it. What else can you ask for.
6 days ago , PA
Great service, I haven't put the parts in, but they do appear to be a direct match. Can't wait to install them! I will pass this information onto everyone.
6 days ago , GA
Easy and Fast
6 days ago , NY
Simple and easy, support was great.
1 week ago , MI
Excellent and easy.
1 week ago , ID
Sales is very knowledgeable and quick to respond
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