Results 1 to 3 of 3

Thread: Riser drains

  1. #1
    Join Date
    Aug 2013
    Location
    St. Louis
    Posts
    56

    Default Riser drains

    When I bought my 89 Sunsport a couple years ago, the manifold plugs were pretty corroded and the riser gaskets had a small leak. I ended up replacing the gasket, which involved removing some very rusty unpleasant bolts, retapping the threads, and replacing the plugs with new plugs (http://www.skidim.com/PIPE-PLUG-3_4-...ctinfo/RS3533/). Given the angle of the exhaust coming off the riser, you really can only retap these threads with the riser off.

    Right now I can remove the plugs with a socket wrench without trouble, but I'm not keen to see the threads deteriorate over time and need retapping.

    I'm thinking about replacing the plug with a valve system. Skidim has a stopcock drain (http://www.skidim.com/EASY-DRAIN-EXH...ctinfo/MCM003/). The guys on the CC pages think this is likely to jam with a little corrosion and recommend using a larger bore drain cock like this: 6D912_AS01.jpg (https://www.grainger.com/product//AN...ain-Cock-6D912 ... yes it will need a 3/4" to 1/2" reducer).

    Has anyone had any experience with a manifold drain? Just keep using the new plug and hope for another 20 years on it?

  2. #2
    Join Date
    Oct 2012
    Location
    Guelph Ontario
    Posts
    515

    Default

    I can't find any definitive pics of my own boat, but from memory, there may not be enough room to turn that thing once it's installed. It's pretty tight back there, but really, for 20 bucks what do you have to loose?

  3. #3
    Join Date
    Aug 2009
    Location
    London, Ontario, Canada
    Posts
    1,117

    Default

    Why not use a ball valve that you can poke to prevent corrosion blockage
    2009 21v Worlds 340 Cat
    run your engine after you change the oil
    Doug

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •