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Thread: Converting log manifolds to center riser

  1. #1
    curtis73
    What's involved with converting my old logs to center riser? Will the new riser/downpipe just match up to the old exhaust?
    Since I'm 90% freshwater lakes, is there any problem using the aluminum exhaust manifolds? I didn't think they made them, but they're for sale on Ebay :idea: Just thought that saving 75 pounds might be nice.

  2. #2
    DUCKY
    Nope. You will most likely need a pair of the cast aluminum elbows that Mercury makes. They are a common install on newer motors where the exhaust goes through the prop, and also a commonly removed item when going through the transom. Any shop that does a lot of thru transom conversions, should have a stack of them....

  3. #3
    curtis73
    Great, so I assume that the lower part of the exhaust that goes through the bellhousing is the same for old and new?

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