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08-19-2017, 02:30 PM #1
Anyone ever widen the OVAL exhaust port on Later omc 56 cu in motor ?
1995 oval port Evinrude 56 cu in triple.
I know that the Oval port can be raised to the exhaust roof as in the sst60 spec, but can the oval port be widened /
of so by how much ? and would this be from top to bottom or wider at top than the bottom ?
and what extra gain would widening the port give ?
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08-19-2017, 10:17 PM #2Member
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try a snowmobile forum... thats where I'd go for that info.
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