The mushroom will only affect boat speed. If you aux is running less than 75% of max RPM at hull speed then a mushroom is just fine. If otherwise, then the mushroom would be a drag ;-).
Phil Agur s/v Wing Tip Secretary/Treasurer Call Sign WCW3485 IC27/270A MMSI 366901790 <http://www.catalina27.org/> www.catalina27.org Vessel Doc# 1039809 -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, April 24, 2007 5:46 PM To: [email protected] Subject: catalina27-talk: Thru-hulls I bought a new depth sounder and have to replace the thru-hull. The exterior of the old and new are the same; however, the new transducer does not fit the old thru-hull. The other difference is the old was a mushroom thru-hull while the new is beveled. Some have suggested not beveling the bottom but just use a lot of 4200, one has suggested I see if I can find a mushroom thru-hull that will fit the new transducer, and two have said...just bevel the hole. Any opinions? I don't see why a mushroom thru-hull (if found) would affect the transducer...but could it. I know this isn't rocket surgery but I have a terribly bad habit of over analyzing everything before I do it...so any help (boat or psychological) will be appreciated. Dave ~~ ¯ 27) ~~ ************************************** See what's free at http://www.aol.com.
