This is my first post but have been reading on here for some time. I have a dealer that sells both. I currently have a CS-500p and PS-421. Love both saws but need something bigger.
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I wouldn't! I would either buy a 6100 or right away a 7310 or 7910. Why hassle with a real heavy for it's power 6400 when you can get right away a larger ccm saw built on the same case?!? The 6400 top end is about unsellable nowadays because everyone wants the 7910 and A LOT of guys have upgraded so you can find them VERY cheap. So jugging by your other saws you are no pro and will NEVER wear out the 6400. In this case, if you want to stay in the 60cc class, either save some money and get a little less powerful echo 590 or get directly a dolmar 6100.Id buy the 6400 and upgrade it later to a 7900.
I wouldn't! I would either buy a 6100 or right away a 7310 or 7910. Why hassle with a real heavy for it's power 6400 when you can get right away a larger ccm saw built on the same case?!? The 6400 top end is about unsellable nowadays because everyone wants the 7910 and A LOT of guys have upgraded so you can find them VERY cheap. So jugging by your other saws you are no pro and will NEVER wear out the 6400. In this case, if you want to stay in the 60cc class, either save some money and get a little less powerful echo 590 or get directly a dolmar 6100.
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How does cylinder size reduce life span of a chain saw? Sorry but this is not true. Engine life has nothing to do with the rest of the saw. The engines wear out with use. The larger the cc, the more obvious they are used by professionals and the more hours they achieve on the clock. The more hours equals to more wear on the piston rings, piston and the coating of the cylinder (either hard chrome or nikasil). This wear is what ends the life span of the chain saw.Originaly the construction of 6400-7300-7900 built for the
6400 size. All the major parts of the mashine is able to handle all the stress what the 64ccm could give, for almost
eternality.
If you use bigger cilinder.......proportionally reduce the life
of the saw.
I have 64ccm, and I am happy with that.
I have a 6400 Dolmar and a 550p Echo. The 6400 while older than the 620p, is a far more refined saw more suited professional use.
How does cylinder size reduce life span of a chain saw? Sorry but this is not true. Engine life has nothing to do with the rest of the saw. The engines wear out with use. The larger the cc, the more obvious they are used by professionals and the more hours they achieve on the clock. The more hours equals to more wear on the piston rings, piston and the coating of the cylinder (either hard chrome or nikasil). This wear is what ends the life span of the chain saw.
Of course you can rebuild etc., but rebuilding is absolutely senseless for a professional to have it done at a store. Shop rates will be at least 50-70%(just the work hours!) the cost of a brand new saw! And then you have only replaced a cylinder and piston.
I understand completely that the rest of the 6400 is overbuilt strength wise for a 64cc saw, but that will not guarentee that the saw will live one more day.
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Originaly the construction of 6400-7300-7900 built for the
6400 size. All the major parts of the mashine is able to handle all the stress what the 64ccm could give, for almost
eternality.
If you use bigger cilinder.......proportionally reduce the life
of the saw.
I have 64ccm, and I am happy with that.
I don't believe that Solo designed the 681 to be a 64cc saw
I wouldn't! I would either buy a 6100 or right away a 7310 or 7910. Why hassle with a real heavy for it's power 6400 when you can get right away a larger ccm saw built on the same case?!? The 6400 top end is about unsellable nowadays because everyone wants the 7910 and A LOT of guys have upgraded so you can find them VERY cheap. So jugging by your other saws you are no pro and will NEVER wear out the 6400. In this case, if you want to stay in the 60cc class, either save some money and get a little less powerful echo 590 or get directly a dolmar 6100.
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