but I thought I share if anyone needs
NICRO Marine Dorade Watertrap Cowl Vent-3" Model N27200
http://cgi.ebay.com/ebaymotors/NICRO-Marine-Dorade-Watertrap-Cowl-Vent-3-Model-N27200-/170701728337?pt=Boat_Parts_Accessories_Gear&hash=item27be9daa51
Steve : I've posted this many times:
1986 thru 1988 have Vetus dorade 4" vents. The 3" Nicro dorades are for 1989 and subsequent production years!!
A thought
http://www.catalinadirect.com/index.cfm?fuseaction=category.display&category_ID=73