Learning the HARD way...
Join Date: Jan 2007
Location: Boston / Ft Myers Area
Thanked 189 Times in 185 Posts
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Re: Oil Scare - Universal M25
Same grade of oil (15W-40) different brand (Motorcraft, from WalMart). Electric gauge - but I believe that it is working. I think that the issue is that the oil was mis-labeled.
Also, forgot to mention that the Oil breather was blowing a fair amount of gas (air), and a little bit of oil out of the engine when the oil pressure was low, and RPMs high. This made me think excessive blow by - caused by the wrong grade of oil.
Also, also, I checked the oil pressure relief valve while I had the oil out of the crankcase, on the theory that it may have been stuck open - it wasn't.
Low RPMs is still a puzzle though. Great idea about the air restriction!!... I will definitely check that out on my next trip to the boat.