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Thread: Seized OBJ exhaust tube

  1. #1
    Member Sapere's Avatar
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    Default Seized OBJ exhaust tube

    Howdy folks. Somewhat new to posting around here so I'm not sure if this is a topic for the modification/refurb forums or the powerboating forums. Figured I'd try here first.

    Background:
    I'm refurbishing an outboard jet lower unit (OBJ model AF). Presently I have the thing entirely stripped down except I can't separate the exhaust tube from the jet volute. Highlighted part 13 in the schematic below. I removed the exhaust clip but the tube itself seems to be seized. Not sure if it's corrosion, sediment, carbon build up or just, well, friction. I about gave myself a hernia tugging on the thing with a pair of channel locks.




    Several generous applications of PB Blaster did not yield any results. So I soaked the whole volute in a tub of solvent for a couple days. It cleaned up real nice, but the tube still won't come out with any amount of force I can easily apply.

    Questions: Has anyone encountered any difficulty replacing the exhaust tube on an OBJ and have a solution? Should it just slide out in an ideal world? How about any recommendations on a product that will penetrate/dissolve whatever buildup is giving it such a death grip?

    Much appreciated.

  2. #2
    Sponsor potbuilder's Avatar
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    Default

    Try a little heat and/or call Gary at Greatland Welding in palmer, he might give you some ideas on how to get it out.

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  3. #3
    Member Sapere's Avatar
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    Default

    Thanks Steve. When in doubt, add fire. I'll give it a try.

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