My 98 225 EFI is running rough the whole boat shakes at 900-1300 rpm. There is no problem starting, running at cruising speed.This all seemed to start happening when I took off the O2 sensor to check the condition of the o2 rod that goes into the cyl head. I know they are prone to getting clogged and I check mine a few times a season. after that it started to run rough? I checked the O2 sensor and the wires seemed to be pinched and it was origanal 98 so I bought a new one $250! and it still runs rough at low rpm?
any ideas anyone? I did put in the fuel additive for the ethanol problems that so many people seem to be having but I have a plastic gas tank in my boat and never had any troubles with fuel...
any ideas anyone? I did put in the fuel additive for the ethanol problems that so many people seem to be having but I have a plastic gas tank in my boat and never had any troubles with fuel...