not exactly auto related, but engine is engine, even if it is 400cc one cylinder...
so i bought 2 identical ride-on-lawnmowers from an estate, both with kawasaki fc420 14 hp engine. im gonna keep one and sell another. they are like twins iin every regard with only one difference, the state of the engine. what im going to describe is my experiene after i changed oil, fuel, filters and put 5-6 hours on them
>mower A
takes ages to start up when it is not burning hot outside, im talking 20 seconds of cranking, giving it a pause and then another 10-15 seconds before it fires up. even when engine is hot it takes a couple of seconds before it starts. once it is running on idle it is silky smooth, i really couldnt believe it how smooth it is. on full throttle it is very loud, but smooth sounding and no strange noises. also i noticed it gets hotter than mower B when doing hard work (i can feel the heat on my shins, radiating from under the bonnet, no temp sensors on this machine so it is somewhat subjective)
>mower B
starts immediately, engine visually in much better shape than the first one, seems like it has done a lot less hours. on idle it is a little louder than the mower A and has something like ticking sound. like there is some metal bracket loose, i really dont know how to describe it. i think it might be coming from the front side of the engine where is the valve cover and exhaust, but im not sure. on full throttle it either goes away or the engine sounds masks it. also, on full throttle it is MUCH quieter than the mower A. it maybe feels a bit stronger than engine in mower A, but im not sure

which one would you get rid of? im thinking of keeping the mower B