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Old 10-16-2012, 06:50 AM
Legolamb Legolamb is offline
TT Enthusiast
Join Date: Apr 2012
Boat: 1996 Prostar 190, LT1
Location: Midwest
Posts: 127
That "thing" is your knock sensor, and yes you need to remove if you want to drain that side of the block. Once removed, you may want to poke around a bit with a small screw driver or piece of wire to make sure there isn't any sediment or rust blocking any more liquid from draining.

Nice pictures and details, thanks for taking the time to document your procedures.

Last edited by Legolamb; 10-16-2012 at 06:53 AM.
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