All I know is that I have an Ariens commercial rated lawnmower that came with a 6 HP Robins-Subaru engine and it is hands down the best engine I've ever owned (and that includes the Honda GX engine). It is a chain driven OHC design, oil filter, extremely quiet, counter balanced engine. I wish every outdoor power equipment I own came with this engine.
Not too stray too far from the original topic of this thread, a while ago, I looked into a Subaru EX21 engine. What a nice engine. There's also an EX21 EFI.
If you want to see this engine in person, check out your Home Depot store for this power washer.
http://www.homedepot.com/Outdoors-Outdoor-Power-Equipment-Pressure-Washers/h_d1/N-5yc1vZ1xr5Zarmw/R-100663197/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053OK. Now back to our program. Someone was talking about Suzuki engine?
This message was modified Jan 3, 2010 by aa335