When my old (15 year with one rebuild) MaxProp was replaced last spring, I went
with a Gori 2 blade racing prop which was discounted
at the time I bought it. My research showed that it had barely measurable drag.
After various discussions with Geoff of AB Marine, I got a 16 x 11 (I think)
for my 36XL/kcb. I had to rely on some sketches from my diver
regarding prop clearance, etc. so I was a little nervous about ordering it with
the boat in the water.
Yard installed it, no vibrations, excessive noise, etc. basically no issues at
all except for me learning that it takes a little more time in reverse
to 'catch' the water and get some flow over the rudder for steerage.
Although there were other issues addressed including a re-faired and new
centerboard at the same time, I am now competitive with other similarly
rated boats that I was not competitive with prior to this.
She reaches hull speed at the recommended shaft RPM which matches the
recommended Beta 1005 cruising RPM.
I am completely satisfied with the switch and only hope that the prop life is
reasonably long.
Charlie Nelson
Water Phantom
cenel...@aol.com
-----Original Message-----
From: Eric Baumes <eric.bau...@gmail.com>
To: cnc-list <cnc-list@cnc-list.com>
Sent: Mon, Feb 11, 2013 9:25 pm
Subject: Re: Stus-List tip clearance
Chris,
What model do you have?
I just yanked my Gori 2-blade prop off my 34/36. I put it on last year and when
it first went on the boat shook like crazy. I got 100 yards out of the marina,
throttled up then turned around. The yard hauled the boat, check the shaft for
true, put it back in the water, aligned the engine, drove it, aligned the
engine again.
I picked the boat up as the racing season had started, and took the boat 9
hours to a regatta. On the way home I brought it back to the boat yard as the
vibration was still bad except for a few RPM bands. I talked with AB marine and
they didn't have a 1 1/8' hub but swapped out the blades. The boat came out of
the water, blades swapped and went back in. It was better, but when I took the
boat out on a cruise, I found the vibration/noise and the complaint of my wife
who sleeps in the aft cabin when I leave anchorage early that it was much
louder than last year.
As I said, I had the yard pull the prop and I am going to contact AB Marine
this week. Given everything I went through last year, I am really tempted to
just get a martec. If they tell me the prop is fine, then I don't want to put
it back on the boat. If they tell me it had to be balanced, I am not sure I
trust putting it back on the boat.
Eric
34/36 #74
On Fri, Feb 8, 2013 at 7:55 PM, Chris Tassone <ctass...@charter.net> wrote:
Steve,
Thanks for getting back to me. I doubt getting this Gori 2-blade 16.5 x 11 RH
prop rebalanced will help since I already did this and the results we're
negative. After trying to resolve this for the last three years I think the
only solution is a new prop. I relied on your company's expertise to size this
prop for me and I made a mistake that I will have to live with. If you know of
anyone that wants to buy a prop please let me know. Thanks for your concern.
Chris
----- Original Message -----
From: Steve Armitage
To: Chris Tassone
Sent: Friday, February 08, 2013 12:22 PM
Subject: Re: tip clearance
Dear Sir,
Perhaps the thing to do is have the propeller removed and re-balanced as i
think you have enough tip clearance and don't see this as an issue. Sorry
that i cannot be more helpful than that.
Regards, Steve Armitage
AB Marine, Inc
747 Aquidneck Ave
Middletown, RI 02842
sa...@ab-marine.com
401-847-7960
On Sat, Feb 2, 2013 at 4:58 PM, Chris Tassone <ctass...@charter.net> wrote:
Hi Steve,
My name is Chris Tassone. I spoke with you at Strictly Sail Chicago
concerning the noise I get with my Gori 16.5" x 11 x 2rh prop. You
suggested that tip clearance could be the culprit. My tip clearance is
5-1/2". I spread the prop by spanning the blades and hub with a strait
edge and measured this distance. I also measured the distance on my 1"
shaft from the cutlass to the front of the prop hub which is 1-3/8". My
boat is a 1979 C&C 34 with a Yanmar 2QM. The noise is really noticeable
and could be a concern if I ever try to sell the boat. Would a smaller
prop solve the problem? I installed a new shaft and coupling when I
purchased the Gori. I lapped the shaft and checked it with a dial
indicator. The shaft is aligned. I really appreciate your attention.
Thanks,
Chris Tassone
231-946-8185 H
231-883-1234 C
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