posted 10-13-2013 08:22 AM ET (US) Good morning. I combed the web but could not find the compression numbers for a 2001 Mercury 90hp four stroke. Does anyone know? Thanks!
dbrown
posted 10-13-2013 11:12 AM ET (US)
From the Manual:
Compression Ratio 9.6:1 Cylinder Compression (Minimum) 138-PSI (950 kPa)