differences
Welllllll almost, It is true that the 357 has a better transfer port I don't think it acounts for the difference in and of itself the 359 actually has bigger transfer ducts. It is also interesting to note that they both have the same port timing and the 359 has a 1mm bigger bore. So why does the 357 make a 1/2 horse more with a smaller motor? The base compression ratio. The 357 has less crankcase area which will produce more power but at the expense of powerband width. The 357 also has an automatic decompressor, while the 359 has a manual decomp. Someone has commented that the 5100 has more power which it does have more rated horsepower. But the .1hp difference could easily be negated from model to model or even by the manufacturer inflating or deflating the specs. The weight difference is real, but irrelevent in a blocking role. The 359 is likely to posess more torque than the 5100 and that will help when blocking. Don't get me wrong the 5100 is a nice saw, I don't know if it is the right one here. The 359 also has a horribly choked up muffler that will yield some nice results if opened up. I do like the comment about getting a bigger saw. Get a 372 if you can, I wish I could justify getting one but the wood around here is seldom big enough. If you don't need one either get a 359.
buck