Forespar MF 840 Vented Loop - 1-1/2" - 903000

Marsoni

M251S

$26.99

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

Forespar MF 840 Vented Loop - 1-1/2" - 903000MF 840 Vented Loop 1 1 2" Installing one of our vented loops will ensure that fluids will not siphon from tank to tank. Vented loops are commonly used in the marine toilet system and engine cooling system. The simple valve system incorporated in the top of the loop allows air to enter the line when not in use, yet effectively seals as water or other fluid passes through. Molded in Marelon, neither vent nor loop will corrode. The duckbill one way valve

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
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Exact fit and cheaper than a trip to a repair shop. Make sure you have the proper gasket sealer, a good scrapper that's not going to dig into the sealing surface, and tools for the job. I went on my computer and downloaded a video that walked me through the process. I'm a mechanic by trade but wanted to ensure everything was correct. I've been running the motor now for a couple of months. Peeing just as it's supposed to. No more delivering, waiting, and retrieving my boat from the shop for its routine service. Just follow your owner's manual to make sure you do all the necessary maintenance.

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Reviewed in the United States on February 8, 2025

Verified Purchase

Chelsey R

Draper, US

★★★★★ 5

Great replacement

Size: For 5.5HP 6HP 7.5HP

Works as it should. Easy to swap out.

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Reviewed in the United States on August 12, 2025

Verified Purchase