Mercruiser 500hp efi: Rocker Bolt cracked ...
06-15-2019, 11:12 AM
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Mercruiser 500hp efi: Rocker Bolt cracked ...
Hi I have an mercruiser 500hp efi engine... Ive just did a refurbishment to the engine... Now after testing the boat for a few miles... I found that the rockerarms nuts are cracking from the middle of the nut.. Any one had this problem before .. any ideas of whats causing the nuts to break ?
Thanks Sam.
Thanks Sam.
Last edited by Samsammlt; 06-15-2019 at 11:20 AM. Reason: Picture
06-22-2019, 07:13 PM
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Nuts not heat treated right or set screws over tightened, are the typical causes.
