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Author Topic:   PSI on 90 Merc 2S
lstrip posted 02-20-2006 07:44 PM ET (US)   Profile for lstrip   Send Email to lstrip  
After searching the archives and owners manual for the proper psi reading, i emailed mercury and got this answer:
WATER PRESSURE
@750RPM (IDLE) 2.0-4.0 psi
@6000RPM (WOT) 10.0-15.0 psi
Why wouldn't this be in the owners manual?
Larry
bigjohn1 posted 02-21-2006 12:55 AM ET (US)     Profile for bigjohn1  Send Email to bigjohn1     
Many values like this are only stipulated in the official factory manual for the engine (as opposed to the owner's manual). Its just the way it is....
lstrip posted 02-21-2006 09:55 AM ET (US)     Profile for lstrip  Send Email to lstrip     
i guess i could understand that if i didn't have a psi gauge come with the boat.
Larry
BOB KEMMLER JR posted 02-21-2006 05:43 PM ET (US)     Profile for BOB KEMMLER JR    
doesn't that motor redline at 5500?
Clark Roberts posted 02-22-2006 08:11 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
The two stroke Merc 90 redlines at 5500rpm and the four stroker at 6000rpm. Larry, are you talking about the two or four stroker?... Clark... SCN
lstrip posted 02-22-2006 10:44 AM ET (US)     Profile for lstrip  Send Email to lstrip     
i have the 90 2 stroke. i explained that to mercury in my email. maybe they missed it. i still cannot understand a boat coming with a psi gauge but, no mention of the proper parameters mentioned in an owners manual.
larry

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