I have a 1994 Snapper 36" Hydro walkbehind, model # PMHA 7364 / 7360 in great overall shape. The previous owner apparently too good care of it and did the PM as needed. Over the last two years I've noticed a slight loss of power when cutting. There is no way to know how many hours are on the Kaw 14hp engine (FC420v-DS09) > no meter. I probably need to have a compression test done to it and it's not smoking. What I'd like to consider is perhaps replacing the engine with some thing that's bigger / more power. What would fit and work with this machine ????!! I use it to get in backyards and I like the control setup and don't know if I want to lay down $3500 - $4500 for a new one. Also by changing to a different/bigger engine, what kind of problems would I run into with routing throttle cables, exhaust etc. Can anyone give me advise on this ? Most shop people have told me to keep with the original model engine but even then there are some differences. If that's the way to go then, what version(s) of the KAW FC420v would be a straight up swap without complications? Is there anywhere else I can get good info on this?