Go Back  Offshoreonly.com > Technical > General Q & A
Piston Mercruiser 496 HO >

Piston Mercruiser 496 HO

Notices

Piston Mercruiser 496 HO

Thread Tools
 
Old 01-13-2015, 12:35 PM
  #1  
Registered
Thread Starter
 
Join Date: Sep 2010
Location: Rüdesheim am Rhein /Germany
Posts: 69
Likes: 0
Received 0 Likes on 0 Posts
Default Piston Mercruiser 496 HO

Hi,
i own a 496 Ho from 2003.
One Piston have a damage and the hohle have a few scrates.
I will put the bock 030 oversize and will intall new Pistons.
My question whats the best pistons for the 496 Ho.
In the Mercury parts catalog there are 2 diffrent pistons ( standart and floating disign )
whats the diffrent beetween that pistons and can i install the Floating pistons in a 2003 block ?
Part No for the standart 030 oversize ist 735-881596 and the Floating design is 735-881596002
Thanks for your help.
ring210 is offline  
Old 01-13-2015, 02:39 PM
  #2  
Registered
iTrader: (1)
 
donzi matt's Avatar
 
Join Date: Jul 2003
Location: Moultonborough NH
Posts: 1,339
Received 7 Likes on 5 Posts
Default

Ignore the cast pistons and put forged pistons in it while apart. If you are this deep in might as well upgrade the rods while you are there. The quickest bet is to give Larry at Raylar a call and have him hook you up with everything you need.
donzi matt is offline  
Old 01-14-2015, 11:01 AM
  #3  
Registered
iTrader: (8)
 
Join Date: Nov 2006
Location: Tygart Lake, WV
Posts: 1,290
Received 122 Likes on 83 Posts
Default

Originally Posted by donzi matt
Ignore the cast pistons and put forged pistons in it while apart. If you are this deep in might as well upgrade the rods while you are there. The quickest bet is to give Larry at Raylar a call and have him hook you up with everything you need.

I agree. Raylar Engineering is who I would call. What are the circumstances behind the piston failure? Stock or modified 496?

From what I have read, 01-03 had pressed wrist pin setup and 04-10 had the floating wrist pins.

Last edited by Ryan00TJ; 01-14-2015 at 11:13 AM.
Ryan00TJ is offline  
Old 01-15-2015, 02:26 AM
  #4  
Registered
Thread Starter
 
Join Date: Sep 2010
Location: Rüdesheim am Rhein /Germany
Posts: 69
Likes: 0
Received 0 Likes on 0 Posts
Default

Hi,
thanks.
The engine have the pressed wrist pins.
The engine is blown because i had bad fuel. So it comes to detonation in the cylider.
Can i put the newer Pistons with the Floating pins in a older engine with the pressed pins?
Thanks
ring210 is offline  
Old 01-15-2015, 03:34 AM
  #5  
Registered
 
Join Date: Dec 2013
Location: Germany
Posts: 408
Likes: 0
Received 1 Like on 1 Post
Default

Hello Christian
Looks like some work this winter on your engine!!
But where did you get Bad Gas ,buy the way,what is bad gas??Normally the Detosensor turn down the power if detonation in motor!?
But not shure is this older version work like this.
Maybe also better to make new bearings on the crankshaft and piston rods when new pistons in the engine!!
Michael
Brembofreak is offline  

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

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.