PUDDLEMAN
08-11-2015, 03:50 PM
1989 Merc 200 efi 2.4 litre. Motor is bogging until 2000 rpm then kicks in and runs fine up to WOT. I changed Thermostats because the were not opening until 168 degrees F. Before thermostat change motor would bog until 2500 rpm then run fine up to WOT. Checked stator ohm readings and dva voltage both in spec. Fuel pressure is 39 p.s.i. When run on muffs plugs in cylinders 1,3,5, centre electrode look dark (normal) cylinders 2,4,6 look washed white wet. Any ideas??