Posted By: DBFishing83
Compression Numbers -- ??? - 02/18/18 01:42 PM
what are average -- good compression numbers for an 06 Mercury 225 Pro XS
Posted By: grout-scout
Re: Compression Numbers -- ??? - 02/18/18 02:56 PM
I’m not a mechanic but I’ve seen several reports posted. I’ve read everything from 120-130 in reports, but you have to properly test them. Full charge battery, water running to the motor, engine control set in neutral with the throttle set to WOT and the kill switch pulled.
Biggest thing is to not have a big difference in the different cylinders.