★★★★★ 5
Works as it should
Works as it should
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
Fasco D578 Unit Bearing Motor, 50 HP, Split-Phase, 1550 RPM, 115V
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Fasco D578 Unit Bearing Motor, 50 HP, Split-Phase, 1550 RPM, 115VFeatures: Iron, Speed nut and vibration damper included Item: Unit Bearing Motor, Motor Type: Split Phase, HP: 50, Nameplate RPM: 1550, Voltage: 115, Enclosure: Totally Enclosed, Rotation: CWLE, Hz: 60, Phase: 1, Speeds: 1, Bearings: Sleeve, Shaft Number: 1, Protection: Auto, Thermal Protection: Yes, Cooling: Ambient.
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Your Fasco D578 Unit Bearing Motor, 50 HP, Split-Phase, 1550 RPM, 115V orders ship within 1-2 business days.
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- Standard: 3-7 business days
- 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.
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4.9 ★★★★★
Based on 540 reviews
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Product Reviews
★★★★★ 4
Four Stars
Just what I needed
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 14, 2016
★★★★★ 5
Functioned as advertized.
Installed these in my Whalers 96 200 Offshore. No issues, used permatex gasket compound on aluminum engine parts after cleaning with fine brass wire wheel.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 20, 2024
★★★★★ 5
Fits 1988 Sea Ray V-135 2 stroke (Mercury)
For those of you with the 135 hp
mercury that was branded as the "Sea Ray 135" and paint matched to the boat (i.e. Seville's and some others) this is the 147 degree thermostat for that motor. My Seville is an '88 and It's difficult to cross reference the serial numbers on those motors when searching for parts. Only buy Quicksilver parts for these motors. Happy to find them on Amazon because Boats.net as an example, is not clear on what you're getting.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 3, 2024
★★★★★ 5
fixed issue
stopped the overheat issue on my outboard!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 6, 2025
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