Offshoreonly.com - 496 exhaust on a 7.4

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Offshoreonly.com (https://www.offshoreonly.com/forums/)

- Do It Yourself, Boating on a Budget (https://www.offshoreonly.com/forums/do-yourself-boating-budget-249/)

- - 496 exhaust on a 7.4 (https://www.offshoreonly.com/forums/do-yourself-boating-budget/265668-496-exhaust-7-4-a.html)

mach1magnum

02-20-2012 07:38 AM

Quote:

Originally Posted by JBravo (Post 3621834)

Eugene or anyone have any pics of the old style to the new style with the hoses??
Just found the same deal on a set of 496HO exhaust manifolds to replace my cast hogs.

Thanks, JB:)

new style has only 2 hoses going to the manifolds makes everything much cleaner all the work is relocating the oil filter and shifter bracket i put them on the transom

mr3dman

02-20-2012 08:47 AM

Is there a way to incorporate the 496 exhaust if you are running the 4" log extensions between the manifold and the riser? sorry for the hijack

Knot 4 Me

02-20-2012 09:33 AM

Quote:

Originally Posted by mr3dman (Post 3621927)

Is there a way to incorporate the 496 exhaust if you are running the 4" log extensions between the manifold and the riser? sorry for the hijack

I've seen taller risers, but I'm not sure how much taller they are over standard. I've seen them on Formula cruisers with Captains Call like on my buddy's 350 SS.

f_inscreenname

02-20-2012 09:53 AM

Quote:

Originally Posted by mr3dman (Post 3621927)

Is there a way to incorporate the 496 exhaust if you are running the 4" log extensions between the manifold and the riser? sorry for the hijack

prepare for sticker shock

http://www.ebay.com/itm/Mercruiser-4...s_Gear&vxp=mtr

http://www.ebay.com/itm/Mercruiser-4...s_Gear&vxp=mtr

mr3dman

02-20-2012 01:42 PM

cool that they make it but daaammmm that is pricey. better off getting the cast aluminum version of the iron exh for the same price as the 6" riser kit. thanks

JBravo

02-21-2012 03:23 AM

Quote:

Originally Posted by mach1magnum (Post 3621890)

new style has only 2 hoses going to the manifolds makes everything much cleaner all the work is relocating the oil filter and shifter bracket i put them on the transom

Do you have any pics of ur install? And do I need a new thermostat cover? I just cant picture mine let alone find pics anywhere and its shrink wrapped in storage.

Thanks

mach1magnum

02-21-2012 05:45 AM

i will get some pics tonight and you do need a new therm housing you can buy them on ebay stainless around $200 cast for $50 to $100

dereknkathy

02-21-2012 05:59 AM

just remember; your old t-stat housing is just as rusty as your old manifolds. you may want to check the water passage across the front of your intake too...

JBravo

02-22-2012 05:04 AM

Okay, sounds good. Gotta go with the bling!:drink:
Thanks guys!

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