★★★★★ 5
Works as it should
Works as it should
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
KTM U6913027 MOTOREX TOP SPEED 4T 15W/50 1L U6920027
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
KTM U6913027 MOTOREX TOP SPEED 4T 15W/50 1L U6920027Motorex Top Speed 15W 50 Synthetic 4 stroke engine oil Excellent protection against wear Extreme thermal and shear stability Wet clutch compatible Low evaporation loss low consumption 15W 50 recommended by KTM as gearbox oil for 2 strokes engines
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Your KTM U6913027 MOTOREX TOP SPEED 4T 15W/50 1L U6920027 orders ship within 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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Based on 781 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
