Author Topic: Echo 670 6700 680  (Read 6154 times)

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Offline sharkey

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Re: Echo 670
« Reply #10 on: August 27, 2012, 09:22:20 pm »
Steve,
Did your 680 P&C kit come with that odd crossed piston and single ring?       

Like the latest 8000 top end the 680 cylinders are coming with the quad port transfers and dome cut squish band/combustion chamber.  It seems they want to sell this top end as a set.  If you order just a piston you get a flat top.  At least that was what was coming earlier this year.  Ill try to get you some pics of the differences.   

One of the Echo dealers told me there were 6 different P&C combinations used on the 8000 since 1986.  8000 piston is not crossed like the 680 and continues to use two rings.

 

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