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Mercruiser 420 HP Longblock

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Old 10-18-2005 | 08:42 AM
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Default Mercruiser 420 HP Longblock

Does anybody know where I can find a Mercruiser 420 HP longblock built to the original specs with crane roller rockers, hydrolic lifters etc.?
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Old 10-18-2005 | 09:36 AM
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Default Re: Mercruiser 420 HP Longblock

Try Mel Riggs from Riggs Marine Service 1-920-872-2728
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Old 10-18-2005 | 10:58 AM
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Default Re: Mercruiser 420 HP Longblock

Thanks but he was no help. Just looking for a 420 HP Longblock, anybody know where I can find one?
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Old 10-18-2005 | 12:09 PM
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Default Re: Mercruiser 420 HP Longblock

How about a 525 efi long block 2003 with 201 hrs.fresh water cooled ?
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Old 10-18-2005 | 12:14 PM
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Default Re: Mercruiser 420 HP Longblock

Gripit,
Lenny @ Millennyum Marine in Harrison TWP, Detriot my have one. I got one from him last year that ran great. 586-468-7361
Good Luck
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Old 10-18-2005 | 12:22 PM
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Default Re: Mercruiser 420 HP Longblock

Lucky, that sounds really good, but I just want a back up long block on hand in case I need to replace an engine. I want the engines to match or I may consider.
Thanks
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Old 08-23-2025 | 05:19 PM
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Default Mercruiser 470

Originally Posted by gripit
Thanks but he was no help. Just looking for a 420 HP Longblock, anybody know where I can find one?
I have a complete Mercruiser 470. Just came from Oklahoma. I'm about to pull the engine.
Steve at 7138062904
Sorry for the typo. It's a 470 not a 420

Last edited by Steve DeZell; 08-24-2025 at 05:18 PM. Reason: Typo
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Old 08-24-2025 | 02:34 AM
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20 years later, this may come to a happy ending with gripit finding a long block so that she can rebuild her engine.

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