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Thread: OMC Exhaust Help
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02-05-2010, 02:53 PM #46
I drilled my 6 holes, then tapped them for 3/4 npt socket head brass pipe plugs. Cross drilled through the socket part of the plugs and wired them so they wouldn't loosen up, fall out and ding anything. They're easy to remove and install, but the snout with a mechanically operated butterfly would be much nicer. Actually, I guess it would be easier to leave the wife at home than deal with the plugs.
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01-28-2014, 08:31 AM #47
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01-28-2014, 04:59 PM #48
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01-28-2014, 06:43 PM #495000 RPM
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01-28-2014, 06:45 PM #505000 RPM
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The slot was cut above the cav plate.
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01-29-2014, 02:03 AM #51
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01-29-2014, 09:50 AM #525000 RPM
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Yeah my own idea, whether or not someone else has done it I would have though so.
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02-01-2014, 01:14 PM #53
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03-27-2014, 03:20 PM #54Junior Member
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Sorry to hijack this thread but a fair amount of this information relates. I am looking to block or partially block the exhaust flow to the propeller for better hole shot. V8 Johnson with sport exhaust. The volume of flow through the snout seems sufficient but I am worried about reverberation from block off plate to lower 4 cylinders. I think it may make a lean spot at some RPM level. Does anyone have any experience with this?