HP 500 valve springs
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I know that Merc is buying the springs from a aftermarket supplier. Proably crane. Or was it comp? Either way, I believe that you want to use the newer HP500efi spring. This spring helps resolve some of the earlier breakage problems.
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I ended up finding the seat pressure was still too high with the new crane springs I have switched over to Comp Cams. If you need a Part # let me know and I will look it up. This info and recomendation came from my head builder. Scott
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