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Engine Opinions

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Old 01-13-2006, 06:54 PM
  #11
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Default Re: Engine Opinions

It's a buyers market so shop away and make offers
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Old 01-13-2006, 09:33 PM
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Default Re: Engine Opinions

Quote:
Originally Posted by chrisf
CMG,

Do you flush the heat exchanger every so often if you boat in salt water?

How does that work on a trailerable boat. I am familiar with big boats that have seacocks to heat exchangers. Does the intake come through the drive or is there a seperate seacock in the hull for the closed cooling.

For 454/502 Mags, do standard ear muffs work, or is there a seperate intake for flushing on these engines

Forgive my ignorance, it just seems to me that my current 5L V8 is @ 1/2 the horspower, so the bigger engines seem to need more flow than the stern drive will allow.

Educate me!

Chris
My experience is with non fresh water stern drives - just sold my last and was an 89 with 2 454 mags. It came from a mix of part of its life in salt and fresh and I saw first hand what the salt does. It had bottom paint so was left in salt and I assumed was never flushed, in the last 4 years that I owned was flushed every time I got home on trailer. I had bravos so was easy to put muffs on drives and used salt away. (see pic) The next boat I get in the spring will have Mercury racing motors (blue) and fresh water. At the very least it will come from well inland fresh water, my primary use is salt - ideally will have closed cooling.
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Old 01-13-2006, 09:55 PM
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Default Re: Engine Opinions

IMO, you will always be better off buying a fresh water motor than one run in salt. With that said, I always thought overall the 454 mag was a great engine. Again IMO, if you go with the newer 496, I think the HO is worth the few extra dollars.

It is not a big deal to flush the old 454/502 blocks. Muffs work, but make sure you run long enough that the thermostat is open so you get the circulation you need.
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Old 01-13-2006, 10:28 PM
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Default Re: Engine Opinions

Quote:
Originally Posted by ANDREW REALTOR
496 Ho Best Of 3 FRESH WATER COOLED!
best of which 3? I agree the HO is a better value than the 496. Which choice is the third?
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Old 01-13-2006, 11:06 PM
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Quote:
Originally Posted by ANDREW REALTOR
SORRY THERE WERE 4 CHOICES THE 496'S ARE FRESH 454&502 ARE NOT?


I was going to chime in that the 525s would be my first choice of closed cooling.
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