WSM Yamaha 300 / 350 Hp 4-Stroke Impeller Repair Kit 750-450, 6AW-W0078-00-00

WSM Yamaha 300 / 350 Hp 4-Stroke Impeller Repair Kit 750-450, 6AW-W0078-00-00

Marsoni

M251S

$102.97

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

WSM Yamaha 300 / 350 Hp 4-Stroke Impeller Repair Kit 750-450, 6AW-W0078-00-00ITEM#: 750 450 WATER PUMP KIT COMPLETE: YAMAHA 300 350 HP 4 STROKE OEM#: 6AW W0078 00 00 BRAND: WSM FITMENTS: Make Model Year(s) Yamaha 8 Cyl 4 Stroke 5. 3L 300 2007 2009 Yamaha 8 Cyl 4 Stroke 5. 3L 350 2007 2017

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The housing is 95% identical. Float valve seat is smaller than mercury/quicksilver. The carb I received was stuck wide open. Had to completely pull it apart to fix the throttle. Then the choke didn’t work correctly. So I ended up putting this housing on with all my old mercury carb parts inside. All I needed was a new float valve but they are back ordered indefinitely. So this worked because the housing is correct but that’s about it. Internals were plastic. Not metal. Jury is still out on the jet size. I’ll update if it floods the motor at speed. Seems to be running very rich. If you’re looking for easy, I’d buy the quicksilver that’s tuned for the motor already. The carb I received idled too fast and even if the throttle wasn’t stuck open it wouldn’t have run well with a racing choke (screams air leak because of poor quality)

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Reviewed in the United States on April 3, 2024

Verified Purchase

Joe Mugavero

Chelsea, US

★★★★★ 1

Throttle pin defective

This carb fits my tohatsu 3.5 hp but the throttle pin is defective. The only way to regulate it running wide open is to choke it out.

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Reviewed in the United States on December 4, 2024

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Asher Dahan

Louisville, US

★★★★★ 5

Perfect fit for a 3.5 nissan

At a great price

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Reviewed in the United States on May 9, 2022

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James P.

Carnegie, US

★★★★★ 5

Quality parts and as described

Color: Black

Product worked great, had all pieces and parts required for the job. Could have used instructions, but I was able to search and find it on YouTube.

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Reviewed in the United States on April 2, 2026

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Marcel Chard

Fort Morgan, US

★★★★★ 5

Great replacement kit

Color: Black

Water pump kit fits perfectly on my 200hp mercury outboard 2000 model. Excellent quality matching the OEM part I replaced from wear & tear. There where however extra gaskets & O-rings that go nowhere on my outboard

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Reviewed in the United States on September 1, 2024