I did the exact change yo are looking at on a 19 foot ranger. I went from a 175 ficht to a 200 HO etec. I did not gain more then 2 mph top end, but the hole shot and torque is a night and day difference. The etec has been trouble free and started every time I turned the key so far, couldnt be happier in the 2+ years Ive had it!