OMAX Thermostat to suit Mercury Mariner F9.9-F40 replacing Pt. No. 825212A1

OMAX Thermostat to suit Mercury Mariner F9.9-F40 replacing Pt. No. 825212A1

Marsoni

M251S

$23.95

Get it in 3 business days with 1 day shipping. Friday, May 29

OMAX Thermostat to suit Mercury Mariner F9.9-F40 replacing Pt. No. 825212A1This is a genuine OMAX Thermostat to replace Mercury Mariner Pt No: 825212A1. It will fit the following four stroke outboard models: Mercury Mariner 9. 9hp Carb (2 cyl 323 cc) 0P075166 0P400999 15hp Carb (2 cyl 323cc) 0P9973100 & up 25hp Carb (2 cyl 498cc) 0P9973100 & up 30hp Carb (3 cyl 747cc) 0P017000 & up 30hp EFI (3 cyl 747cc) 0P153500 0P400999 40hp Carb (3 cyl 747cc) 0P153500 0P400999 40hp (EFI) (3 cyl 747cc) 0P401000 0P400999 OMAX is a premium

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Your OMAX Thermostat to suit Mercury Mariner F9.9-F40 replacing Pt. No. 825212A1 orders ship within 1-2 business days.

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Fast: 2-3 business days
Express: 1-2 business days

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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

Got this to replace cabin air filter on 2020 Honda Civic Sport, as it said it was a direct fit… It does fit but not perfectly! Holding it next to the filter you can see the size difference, with the original being slightly longer. I noticed a whistling sound from the AC at full blast right after install. I believe this noise is caused by the small gap left in the retainer box with the slightly smaller filter. Luckily it is not incredibly loud, but it’s still there. The quality of filtration seems to be much better than stock filter, but the fitment not exact for vehicles mentioned above.

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Reviewed in the United States on May 17, 2026

Verified Purchase

Bon43

Belleville, US

★★★★★ 5

Awesome

Easy to install. Fit appropriately. Value for the money for sure.

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Reviewed in the United States on September 26, 2025

Verified Purchase

tprizzle

San Leandro, US

★★★★★ 5

Will continue to repurchase

I have purchased this product multiple times for my Honda CRV. Works great and is actually pretty easy to install. I will definitely repurchase once the time comes to replace again. Great value for the price compared to at the dealership

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Reviewed in the United States on June 1, 2025

Verified Purchase

Amazon Customer

Birmingham, US

★★★★★ 5

Good engine filter at a fair price

Worked for my 2018 Honda CR-V. Arrived quickly. Make sure you check the shape of your filter before ordering. I originally ordered a rectangular filter that Amazon said would work for my car. I was able to return it and order the correct one.

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Reviewed in the United States on April 1, 2026

Verified Purchase

Calvin

Whiting, US

★★★★★ 4

👍🏾

Perfect fit

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Reviewed in the United States on March 7, 2026