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Search: Posts Made By: Johnny Mac

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Forum: General Boating Discussion

05-16-2007, 07:53 PM

Replies: 144

Sunk 51 OL

Views: 44,178

Posted By Johnny Mac

Has anyone ever replaced a 454 with a 496 in a...

Has anyone ever replaced a 454 with a 496 in a 1990 Sea Ray 270DA? If did it run much faster?

Forum: General Boating Discussion

09-06-2006, 11:59 AM

Replies: 2

Lose of power

Views: 782

Posted By Johnny Mac

Lose of power

I have a 1990 454 Mercrusier. I start losing RPM's, power and speed after running hard for about 5 to 8 minutes. Once I reduce my speed to an idle for about 2 minutes and can get back up to max...

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