[C320-list] Autoprop Feedback/dripless shaft seal

[Welch, Myron D]

Dick,

I too updated my dripless shaft seal to the newer vented model ( they sent it to me for free!) last year. Where did you route the vent tube? The PYI suggested placement was not good. Thanks. 

Myron Welch
Wind Instrument #238
Iowa City, Iowa
Grace Memorial Harbor
Elk Rapids, Michigan 

Sent from my iPad

On May 16, 2013, at 11:15 AM, "Dick Walker" <dickwalker at att.net> wrote:

> When I ordered my year 2000 C-320 I made the following changes TO THE DRIVE
> TRAIN.  SS PROP SHAFT, FTI DRIPLESS shaft seal and the AUTOPROP.
> 
> They really helped the performance and maintenance.
> 
> With the autoprop at about 2700 RPM on the Yanmar engine I get hull speed
> +/- 7.1 kits. I did not have to perform any modifications to the strut.  I
> use about .6 gallons per hour at 2700 RPM.
> 
> After 8 years I changed the dripless shaft seal to the new model that does
> not need to be burped.
> 
> Here is my in water test
> RPM    2.61 Gear    2.21 Gear
> 1000    4    2.7
> 1200    4.7    3.5
> 1400    5.45    4.3
> 1600    6    5
> 1800    6.4    5.6
> 2000    6.6    6
> 2200    6.9    6.3
> 2400    7.2    6.6
> 2600    7.3    6.7
> 2800    7.35    6.85
> 3000    7.35    7.1
> 3200    7.35    7.2
> 3400    7.35    7.3
> 3600 ft    7.35    7.35
> 
> Cheers and give me a call if you have any questions
> 
> 
> Dick Walker
> WindWalkerII #687
> 619.435.8986
> 
> 
> 
> -----Original Message-----
> From: c320-list-bounces at lists.catalina320.com
> [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Brian &
> Christine Borchers
> Sent: Thursday, May 16, 2013 8:49 AM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] AtoProp Feedback
> 
> Andrew, 
> 
> Thanks for the info regarding the shaft extender.  Is the extender a plate,
> similar to the coupler? How much extension is needed and what does it look
> like?  Also, do you know the amount of shaft that is needed following the
> strut to accommodate the propeller.  Again, thanks for the feedback.
> 
> Brian Borchers
> Sent from my iPhone
> 
> On May 16, 2013, at 8:34 AM, Andrew Santangelo <andrew_santangelo at mac.com>
> wrote:
> 
>> Brian,
>> 
>> I have had an autoprop on my C320 for the last 15 years - it was my first
> "major" addition to Dawn Treader.
>> 
>> I both cruise and race.  Cruise wise it works excellent in forward and
> reverse (no prop walk).  The performance under power and the fuel economy
> significantly improved.  If I recall, I hit hull speed at a lower RPM.
>> 
>> Race wise it was one of several key improvements.  I have not raced in the
> last few years, but when we did we either placed or won.  When first racing
> as newbs we were dead last always (and I mean last).  After adding the
> autoprop we moved to the middle of the fleet.  (Later additions include fin
> keel, hydraulic backstay, racing sails, racing sheets and halyards, etc.).
>> 
>> Installation requires a shaft extender.  I forget the name/brand of mine,
> but it goes between the prop shaft and the engine.  It also suppresses any
> added vibrations and isolates the prop shaft/prop from the engine (reduces
> rust?).  Without it, the prop will whack the strut, a definite no-no.
>> 
>> 
>> Andrew Santangelo
>> 
>> C320 "Dawn Treader"
>> #333
>> San Francisco, CA
>> 
>> J22 "Blitzkrieg"
>> Elephant Butte, New Mexico
>> 
>> 
>> 
>> On May 16, 2013, at 3:36 AM, Brian Borchers wrote:
>> 
>>> 
>>> Hello,
>>> 
>>> I am considering an Autoprop for our 320. I reviewed some photos  of
> "Nauti - Duck" on the C320 web site and it looked like the strut had a cut
> out, does anyone know if this was done to accommodate the propeller?   Those
> who have the Autoprop or have had an Autoprop, your feedback and experience
> regarding the propeller is appreciated.  
>>> 
>>> Brian
>