What brand are u using? Oil shows 25w-40 or 10w-30
What brand are u using? Oil shows 25w-40 or 10w-30
Last edited by BD1; 11-06-2017 at 09:43 PM.
I see the lower unit is HP 90 weight, oil has 25w-40 or 10w-30
What weight should I run 25w-40 or 10w-30
If your ambient air temp is regularly 100 degrees plus I'd run 25W-40. Other than that I'd run 10w-30.
David Patten
Automotive and marine technician.
Mercury's recommendation is the 25w40, unless you will be running in extremely cold winter temps.
Mercury or Quicksilver Fourstroke Oil would be my recommendation.
For Gear Lube: Mercury or Quicksilver High Performance Lube.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
When I pulled the cowel it only showed 10w-30 on the motor plate
Ok I've been asking what oil is recommended for the 150 FourStroke, book say 25w-40 & 10w-30. I ended up buying the 25w-40 for after break in to change it. I just installed a VesselView Mobile & when I had the cowel of the guide on the motor only had 10w-30. Any taught if I should use the 25w-40 or get 10w-30??? Tried messaging Mercury on Facebook but no replies back.#MercuryMarine
In post #6 Don gave you his answer. He is a Mercury certified technician. Either one is fine if you operate in moderate temperatures. If you regularly run in sub freezing temperatures use the 10w30 and warm your motor up good before running wide open. If you don't fish in the winter the 25w40 if fine.
I use 10w30 in my 2015 115 4stroke even here in Tennessee but I regularly crappie fish in the winter.
Last edited by Lowerider58; 11-27-2017 at 07:15 AM.
See post #6. Your manual is correct- label space is limited, full reference for maintenance and/or repairs is located in the Service Manual.
You can also use the QR code on that label to watch some interesting videos. Don't take everything in them to heart... some of them have some funny errors.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
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