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how many hours before rebiuld on 525

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Old 09-22-2007, 03:19 PM
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Default how many hours before rebiuld on 525

I would like to know how many hours before a rebuild on a 525.....200 hours give or take and about 40%-50% of it is below 2k rpm.....pleaser use.....?
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Old 09-22-2007, 03:26 PM
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Probably around 350 to 400. We have 340 I think on ours. We did the top ends about a 100 hrs ago. They still run strong!
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Old 09-22-2007, 04:16 PM
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thank does any one else have them so that I can get some opinions.
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Old 09-22-2007, 04:21 PM
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400-500 with proper maint.
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Old 09-22-2007, 04:28 PM
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Originally Posted by lowblue320 View Post
I would like to know how many hours before a rebuild on a 525.....200 hours give or take and about 40%-50% of it is below 2k rpm.....pleaser use.....?

Good time to rebuild the heads with all new parts and new roller lifters... Should be good for another 2-300 more hours with regular maint.!
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Old 09-22-2007, 04:31 PM
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Old 09-22-2007, 04:37 PM
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Watch the headers
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Old 09-22-2007, 05:11 PM
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thanks guys just wanted to do things right.
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Old 09-22-2007, 05:31 PM
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Originally Posted by Lucky Strike Jr View Post
Watch the headers
Yea that to. They are very leaky!! Where's the pics of the new Motion Lowblue320??? The 525's are a great package for that boat.
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Old 09-22-2007, 09:50 PM
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Originally Posted by lowblue320 View Post
I would like to know how many hours before a rebuild on a 525.....200 hours give or take and about 40%-50% of it is below 2k rpm.....pleaser use.....?
Just curious, but why do you have almost half your hours below 2K rpms? Lots of no wake zones perhaps??

From what I am told it is not good for marine big blocks to run at low rpm for a large percentage of time.

Last edited by Macklin; 09-22-2007 at 09:57 PM.
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