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#1
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1980 470 Mercruiser
Can I replace my cast iron exhaust manifold and riser with the later aluminum pieces and what parts do I need to match up to the exhaust without replacing the inner transom plate?
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#2
11-06-2008, 07:34 PM
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you can replace it, but unles you find a good used dead engine to get the parts off of,its going to be expensive$$$$$$. personally, I'd prefer the cast iron manifold, they gave a lot less trouble. I think your engine has the 3" exchanger, you would have to upgrade to teh 4' if you run the alumium manifold(aluminum transfers more heat)
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#3
11-07-2008, 11:10 AM
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Look on ebay, theres manifolds and risers on there for sale now. Just look under mercruiser 470 or 3.7 or 224. You stand to save alot of money!
__________________
 77 V20 cuddy with 170 I/O Mercruiser 72 16ft. Carolina w/a 25hp Evinrude
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