Merc 150 compression

[Trevor1977]

Can anyone tell me what or where to find the compression numbers for a 150hp 1989 merc outboard is supposed to be

 

[Dukedog]

115+ would be reasonable with a "KNOWN ACCURATE" gauge. jmo... all should be within 10lbs of each other.. merc doesn't give a specific number for any of their motors....

 

[sam am I]

 

[Dukedog]

115+ would be reasonable with a "KNOWN ACCURATE" gauge. jmo... all should be within 10lbs of each other.. merc doesn't give a specific number for any of their motors....

115 ta 135 isn't to close if ya ask me... jmo. you'll find those numbers in justa bout all 2.0, 2.4, 2.5 manuals.. ​