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We have all heard about CMI header issues but

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Old 03-20-2023 | 12:57 PM
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Default We have all heard about CMI header issues but

How about Crane rockers?
Well my Mercury racing 700's have them
i know they have been around forever and have been used in everything with great results.
Well last year i had one fail at LOTO. mechanic thought it was just a fluke and the rest looked good. well few trips later another one lets go.
so time to pulll them all out and change them. well turns out that there where a few that were failing,
both motors have parts of bearings thru them, not a good thing.

Did a little bit of research and it seems in 2008 Crane went to a different manufacture of the bearings and it can be a hit of miss on them, Just like testing
cmi headers i would advise swapping out the crane rockers. way cheaper than what i'm going thru.

With only 160 hours on them i now get to rebuild both motors

Looking forward to this summer with couple brand new motors



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Old 03-20-2023 | 01:25 PM
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Holy crap!! Are these the standard crane golds that have been in everything for like ever?? lol I have them in mine and I'm now getting nervous! Any pics of the failed rockers and what's going on with them?
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Old 03-20-2023 | 01:26 PM
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Like these?
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Old 03-20-2023 | 01:28 PM
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What's your plan for replacements?
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Old 03-20-2023 | 02:08 PM
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I had Crane Golds in my Innovation/Volvo 600s with 400 plus high revving hours, and never an issue. Mine were pre 2008 vintage
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Old 03-20-2023 | 02:10 PM
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yep those are what i had, Going with Crowler enduro stainless



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Old 03-20-2023 | 02:27 PM
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Yikes! Are those shaft rockers you're going with or regular stud mount?
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Old 03-20-2023 | 02:37 PM
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Friend of mine hade a couple of crane gold fail in his 700sci as well, think his boat is 2005
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Old 03-20-2023 | 03:03 PM
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Originally Posted by BBYSTWY


Like these?
that is the wrong polly nut for those rockers
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Old 03-20-2023 | 03:10 PM
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Good eye. The nut Looks like they are hitting the rocker.

On the Crane Golds, yeh…the old standard ‘good one’s’ had s squarer back , and a few had to be ground to clear some rocker cover bolt hole locations on int valve/ manifold side.
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