Most Hour's On A 496 Ho Motor
 

What Is The Most Hour's On A 496ho Motor Before Any Type Of Rebuild .
Same Question For The Bravo X Drive's
Thank's
Mike

merc's rule of thumb is approx 300-400 hours(do head/valve job) and approx 150 hr on the drive

Alot more then the blue motors:drink:

I know there are some comm'l applications into the 1000's of hrs. For a perf boat I would do the 300-400hr work mentioned above...we like'em to run fast, strong, and reliable right?

i'm at like 450 or so...guess i need to get mine done! how much does something like that typically cost??? and should i do it now? or just wait till the end of season?

A buddy of mine has over 950 hours and still has excellent compression on all cylinders on a twin engine installation. He keeps his oil, filters and plugs changed regularly. He had to replace the exhaust manifolds at about 700hours as they were the aluminum ones and they started leaking. Still runs like new.

I had 502's with almost 700 hours on them. Compression was down but still ran fairly strong. I've since rebuilt them.

I have some new (steel crank) 496 HO Long Blocks for $4,700 if you want new not rebuilt at 400+ hrs.

you're kidding right? overhaul?