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-   -   Cyl wall scuffing (https://www.offshoreonly.com/forums/general-q/283542-cyl-wall-scuffing.html)

mike tkach 08-29-2012 10:13 PM
Originally Posted by JeremyAnderson (Post 3765463)
On a fresh engine, I would venture to say the scuff was from not enough piston to wall clearance. Marine engines need a couple extra thousanths to deal with hot pistons and cold coolant temps.
It usually takes a good bit more water temp than 230 to scuff a piston from overheating. Just my 2 cents....
i agree,i like .001 xtra wall clearance on marine engines,as far as 230 deg water temp,that in itself probibally did not scuff the walls,but that combined with wot running,detonation probibally occured.


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