I have a toro Timecutter ss5000. Model number 74631 (2014 model) running on a Kawasaki fr691v-fs00, bogging down on lawns it doesn’t normally. I have changed the plugs, old ones were dry and looked whiteish. I’ve changed the fuel filter, air filter, new carburetor, removed fuel lines and forced air through them, performed a sea foam treatment, added star tron fuel additive to the fuel tank after draining and refilling with fuel, in case I got bad fuel somewhere along the line, changed both coils, new starter solenoid, drained and dried out fuel tank, refilled with the star tron and I’m still having the same problem! I also have a fuel pump on order that should arrive tomorrow. At times I’ve smelled raw gas after mowing. No sign of fuel leak though. Looking for something that I could possibly be missing. Anyone have any suggestions?? Thanks in advance!