exhaust valves
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Re: exhaust valves
The serial number is om900421 and it is a blue motor. We are installing the R-tech supercharging system and they highly recommend that it have inconel valves. Thanks for your help.
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Re: exhaust valves
If it has aluminum heads then it should have Inconel.
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Re: exhaust valves
The aluminum heads used the 525's are made by Edelbrock for Mercury. They come with Ferea (sp) valves in them. This part of the reason the motors went from 500's to 525's. The aluminum makes a little more power than the cast heads do.
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Re: exhaust valves
My engine builder says that there in no real way to know FOR SURE if the valves in a head are Inconel or not unless you take them new out of Manley's package and install them yourself. However, if you call Merc's racing dept. with that ser.#, they will tell you what was installed from the factory. --- Jer
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