Parker Yahoo Group Archived Messages

ID From Subject Date
367 McGuffey, David RE: I''ll let you know how they work 3/18/2005 14:54:00

Keith,

You're right--I couldn't find my old post either. Maybe when Wiley upgraded
the site a few months back, some of the old archives didn't make the move.

Anyway, I have a Parker 2150 with twin F115s. Bottom line is that the twin
F115s add enough weight to the transom that the small OEM tabs don't have
enough effect. I believe this set up is a bit more transom heavy and thus
should have much larger tabs. The cost of tabs was high compared to the
DoelFins. So I went looking for DoelFins.

First I did some research and discovered that there were a lot of complaints
against the DoelFins (and similar styles) that bolted onto the ends of the
anti-ventilation plate. Appears that the constant flexing eventually cracks
the plate. The recommendation was for the kind that bolt to the bottom of
the anti-ventilation plate, and have full contact with the bottom of that
plate. Only two manufacturers meet that--Permatrim and CoBra Marine.
Permatrims were much more expensive, and I needed two. So I ordered two
CoBra plates from Cabela's. They were much lower cost and worked great.
Get the unpainted SS ones--the paint comes off over the long-haul anyway.

The plates give the transom much more lift, and I don't have to trim the
motors all the way in to get the bow down like I did without the plates. In
fact, I can run the motors at almost the neutral position, and the tabs have
become much more sensitive/effective. Actually improved my gph burn because
the motors were more neutrally trimmed and the tabs weren't plowing furrows
in the water like before.

The plates are so effective, that If I trim the motors all the way in, I can
force the bow down too far, and the ride gets squirrely. So...I'm very
happy with the outcome.

LTC Dave McGuffey (USA Ret.) aka Skopje on both thehulltruth.com and
tidalfish.com


-----Original Message-----
From: Keith Tsuchiyama [mailto:<a href="/group/parkerboats/post?postID=vWQKsizXxxuxi-2Ur1-MezZkDVST0HMa4ZzpnICObj58i3NHd1MBDNy0rrxjnFyFpwfnyitSECUrITRQyhycq_u4bWRG">ktsuchiyama@...</a>]
Sent: Friday, March 18, 2005 2:18 PM
To: <a href="/group/parkerboats/post?postID=j3QzuAT5tHr_vd8bb_ysPCsRVXEOPbg843YrSJx6W72izCcW3jUOZfb4g0v3p8G-CPg9MT4mDlxco1-hF5cnp87c">'parkerboats@yahoogroups.com</a>'
Subject: RE: [parkerboats] I'll let you know how they work



I tried to search for this dissertation, couldn't find it. sorry.



-----Original Message-----
From: McGuffey, David [mailto:<a href="/group/parkerboats/post?postID=82lwwJ8ABQsZLHkrPE7Um9lI77hq50QhSExDTJodslccQcBH_8G5H6AXtMwbO92OOfJVonFiKWBKgn6pS0llLniuEjM">david.c.mcguffey@...</a>]
Sent: Friday, March 18, 2005 11:12 AM
To: <a href="/group/parkerboats/post?postID=j3QzuAT5tHr_vd8bb_ysPCsRVXEOPbg843YrSJx6W72izCcW3jUOZfb4g0v3p8G-CPg9MT4mDlxco1-hF5cnp87c">'parkerboats@yahoogroups.com</a>'
Subject: RE: [parkerboats] I'll let you know how they work



Obviously you didn't do a search on TheHullTruth.com and see my long
dissertation on the CoBra plates I mounted on twin F115s on a 2510.

-----Original Message-----
From: Art Marshall [mailto:<a href="/group/parkerboats/post?postID=D8hddMuPknLWQJZTSYdTIACXWnjVTzW9dtnvqng0bjQ4uRzRSV4A2W6dfxHlUuyy6hkd0GkyA32lOI81RCP3ixCSG_BdLw">thehoseconnection@...</a>]
Sent: Wednesday, March 16, 2005 10:04 PM
To: <a href="/group/parkerboats/post?postID=9pFAkENLTikR0S9Q6QFgK9ilHlDd3I-U3pZmLB6RZfCfDdVqiPNrKmyFrI0zIaf_CDFtYXG1vfKhQa-wD5y2amvf5Q">parkerboats@yahoogroups.com</a>
Subject: [parkerboats] I'll let you know how they work



As a means of decreasing my planing speed I have just purchased a
set of Permatrims. I have been searching for an answer to the
question " what's the best way to reduce planing speed and to hold
plane?" I have found absolutely ZERO definite answers. I've seen
similar questions on differing sites with responses like, doelfins,
4 blades, bigger tabs but, have yet to read " I did such and such
and it works excellent/sucks". So I bit the bullet and will
eventually let you guys know how they work. Why Permatrim? My
dealer and a friend have had little success going the 4 blade
route. Beside the fact $$$$. The dealer suggested doelfins,
actually one set for two engines, just mounted to the outsides of
either engine. I have heard that 2 sets would cause way too much
stern lift and drag, and would adversly affect the ability to trim
up. I hate running with the tabs fully tucked down so bigger tabs
were never an option. The only choice for me was Perma. Hope it
works or I'l have a few holes to fill in the cavitation plates when
I remove them!





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