Notices

502mpi or 496 Mac

Old 07-28-2021, 12:41 PM
  #1  
Registered
Thread Starter
 
Join Date: Jul 2013
Posts: 41
Likes: 0
Received 2 Likes on 2 Posts
Default 502mpi or 496 Mac

Gentlemen I am looking at an 01 with 496 Mags 475 hrs one owner boat OR 00 502 MPI 300 hours. I do not intend to modify engines and I am most interested in reliability and cost of ownership. I would love to hear yall’s thoughts on why one might be preferable given my priorities. I should add that we like to cruise the ICW as well as lakes and the 496 mags have closed loop cooling.

Last edited by Michaeloh59; 07-28-2021 at 02:09 PM.
Michaeloh59 is offline  
Old 07-28-2021, 01:49 PM
  #2  
Registered
 
Join Date: Aug 2014
Posts: 788
Received 83 Likes on 57 Posts
Default

502s.

Less sensors to go bad, no antifreeze, no water pump wear issues.

tmmii is offline  
Old 07-28-2021, 01:58 PM
  #3  
Registered
iTrader: (2)
 
Join Date: Aug 2010
Location: Cape Coral FL
Posts: 1,767
Likes: 0
Received 142 Likes on 89 Posts
Default

no question, 502's
snapmorgan is offline  
Old 07-28-2021, 02:11 PM
  #4  
Registered
Thread Starter
 
Join Date: Jul 2013
Posts: 41
Likes: 0
Received 2 Likes on 2 Posts
Default

Would it make a difference if you wanted to cruise salt water and the 496 mags had closed loop cooling?
Michaeloh59 is offline  
Old 07-28-2021, 02:20 PM
  #5  
Registered
iTrader: (2)
 
Join Date: Aug 2010
Location: Cape Coral FL
Posts: 1,767
Likes: 0
Received 142 Likes on 89 Posts
Default

Not to me it wouldn't. You can install closed cooling on the 502's, but if you flush it well after use, they will last a long time
snapmorgan is offline  
Old 07-29-2021, 11:08 AM
  #6  
Gold Member
Gold Member
 
Dave M's Avatar
 
Join Date: Oct 2000
Location: Hollywood, MD, USA
Posts: 5,577
Received 56 Likes on 37 Posts
Default

I'd pick the boat you like best. Both are good motors.
Dave M is offline  
The following 2 users liked this post by Dave M:
onesickpantera (07-30-2021), Wildman_grafix (07-29-2021)
Old 07-29-2021, 10:39 PM
  #7  
Registered
Thread Starter
 
Join Date: Jul 2013
Posts: 41
Likes: 0
Received 2 Likes on 2 Posts
Default

Thanks to those who took time to reply.
Michaeloh59 is offline  
Old 07-30-2021, 05:25 AM
  #8  
Member #154
Platinum Member
 
Indy's Avatar
 
Join Date: Oct 2000
Location: SW CT & Long Island Sound
Posts: 7,516
Received 302 Likes on 115 Posts
Default

First of all, they're 20 year old engines, maintenance is going to be priority one, if you can get records or feel confident on how they were maintained it would help with the decision. I've had both, they were both great engines, get the boat you want and get them checked out, even though the hours are low they're still old and will need to be looked at first.
Indy is offline  
Old 07-30-2021, 12:39 PM
  #9  
Registered
 
Join Date: Dec 2016
Location: Portland OR
Posts: 263
Received 126 Likes on 65 Posts
Default

There's plenty of 1000+ hour 496s running around. They are quite reliable if left stock. At the time of development of the 496 platform, it was the only big block to ever make it through to the end of Mercury's full throttle endurance tests. (I think that's a few hundred hours at full throttle.)

If you plan on modifying it at all, I'd go with the 502. There's lots more aftermarket parts available for the 502. It's a great engine platform with lots of interchangeable parts.

So, go for the one that looks to be better cared for and hopefully that's the one you like the most.
87MirageIntruder is online now  
The following 2 users liked this post by 87MirageIntruder:
PA.WOODCHUCK (07-31-2021), rak rua (07-30-2021)
Old 07-30-2021, 01:56 PM
  #10  
Registered
 
Join Date: Aug 2007
Location: Merritt Island, FL
Posts: 283
Received 95 Likes on 40 Posts
Default

Originally Posted by 87MirageIntruder View Post
There's plenty of 1000+ hour 496s running around. They are quite reliable if left stock. At the time of development of the 496 platform, it was the only big block to ever make it through to the end of Mercury's full throttle endurance tests. (I think that's a few hundred hours at full throttle.)

If you plan on modifying it at all, I'd go with the 502. There's lots more aftermarket parts available for the 502. It's a great engine platform with lots of interchangeable parts.

So, go for the one that looks to be better cared for and hopefully that's the one you like the most.
300 continuous hours at Wide Open Throttle was the achievement - GM's test, not Merc's, as far as I know.
DrFeelgood is offline  
The following users liked this post:
87MirageIntruder (07-30-2021)

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.