[C320-list] Prop shaft nut and cockpit speakers

[Don Poole]

Hull #74 1994 two nuts. Why debate. Double nut beats single every time. Prop loss when in reverse is a BIG problem. 
Mount in doors on each side of helm seat facing forward. Use boat as a speaker cabinet.  Drilling a 4"-5" hole is not fun but once they are there you know thats where they belong. 

> On Feb 21, 2016, at 2:00 PM, c320-list-request at lists.catalina320.com wrote:
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> Today's Topics:
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>   1. Re: Castle prop nut loose. (tharrison at innovations-plus.com)
>   2. Cockpit Speaker Placement (swampcreek42)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Sun, 21 Feb 2016 13:36:14 -0500
> From: <tharrison at innovations-plus.com>
> To: <C320-List at Catalina320.com>
> Subject: Re: [C320-list] Castle prop nut loose.
> Message-ID: <003f01d16cd6$bed3fca0$3c7bf5e0$@innovations-plus.com>
> Content-Type: text/plain;    charset="UTF-8"
> 
> Sorry to jump in on this topic. Do you use a bass key on a bass shaft and prop or is a steel key ok to use? 
> 
> If you use a steel key does it cause galvanic scaling and almost weld itself in place?
> 
> Thanks
> 
> Ted Harrison
> Magic Moment (1997)
> Whitby Ontario
> 
> -----Original Message-----
> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Marek Fluder
> Sent: Saturday, February 20, 2016 7:48 AM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] Castle prop nut loose.
> 
> Thank you Graeme and Joe for your input.
> As I have mentioned, because of previous discussions on similar topic where air guns, PB Blaster and breaker bars were mentioned to loosen the nut, I felt a little silly when touched mine and it was free...
> Joe - my conclusion from those discussions was that some of our boats have
> 1 and some 2 prop nuts.
> Graeme - I have the same thoughts about forces exerted on the prop, but I think vibrations might eventually loosen it up.
> I will attempt to tighten it up if positioning of the cotter pin opening aligns with desired tightness.
> Thanks again.
> 
> Marek
> #1028, Lake Ontario
> 
> 
> 
>> On Wed, Feb 17, 2016 at 3:03 PM, Graeme Clark <cg at skyflyer.co.uk> wrote:
>> 
>> There is only one nut on mine!
>> 
>> I think you are worrying un-necessarily. When in forward gear the 
>> effect of the prop is that it pushes itself onto the shaft (it?s 
>> pushing the entire boat forwards too!). I think the shaft is tapered 
>> as is the inside of the prop so the effect is to ?jam? the two together.
>> 
>> There is a limit to how far you can turn a castellated nut and still 
>> get the holes in the shaft to align with a slot in the castellations 
>> so it may not always be possible to get the nut really tight.
>> 
>> Only in reverse gear is there a risk of the prop sliding back. However 
>> there is a key in the shaft and prop hub so even if it does slide back 
>> it will not rotate. There is no circumstance where the split pin 
>> through the nut is transmitting the torque and might shear -  that just wont happen!
>> The pin is just to stop the nit rotating loose!
>> 
>> All in my humble opinion of course!!
>> 
>> Graeme
>> #366 Jaskar, Falmouth, UK
>> 
>>> On 17 Feb 2016, at 19:46, Joe Abbagnaro <jabbagna at gmail.com> wrote:
>>> 
>>> Hi Marek
>>> In the photo you can see on the shaft a place for a second pin to go
>> through indicating a second nut it has been a while since I have owned 
>> the
>> 320 but I am pretty sure you should have 2 nuts. Let's see what others 
>> have to say
>>> Joe
>>> 
>>> Sent From Mobile Device
>>> 
>>>> On Feb 17, 2016, at 2:11 PM, Marek Fluder <marekf at gmail.com> wrote:
>>>> 
>>>> Joe,
>>>> I have only one castle nut.
>>>> Here is the photo:
>>>> https://goo.gl/photos/ayW5YSYhw17DUzUJ6
>>>> 
>>>> Marek
>>>> #1028, Lake Ontario
>>>> 
>>>>> On Wed, Feb 17, 2016 at 1:54 PM, Joe Abbagnaro 
>>>>> <jabbagna at gmail.com>
>> wrote:
>>>>> 
>>>>> Yes you need to tighten that nut should not have any slack not 
>>>>> 100%
>> Sure
>>>>> but thought it was a double nut on the prop Joe
>>>>> 
>>>>> Sent From Mobile Device
>>>>> 
>>>>>> On Feb 17, 2016, at 10:48 AM, Marek Fluder <marekf at gmail.com> wrote:
>>>>>> 
>>>>>> After reading previous discussions about cutlass bearing 
>>>>>> replacement I
>>>>> was
>>>>>> looking at my prop and shaft yesterday.
>>>>>> Shaft play at cutlass bearing is about 0.4mm (1/64") so I do not
>> think it
>>>>>> needs replacement at this time.
>>>>>> I have found though that the castle nut is free (not tight 
>>>>>> against the
>>>>>> prop) being held by the cotter pin. Fixed 3 bladed prop seems to 
>>>>>> be
>>>>> solidly
>>>>>> jammed on the shaft.
>>>>>> Do I need to tighten the nut?
>>>>>> 
>>>>>> Marek
>>>>>> #1028, Lake Ontario
>> 
>> ???????????????????
>> I work irregular hours and often write emails late in the evening and 
>> at weekends; that doesn?t mean I expect you to do the same; reply when 
>> convenient!
> 
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Sun, 21 Feb 2016 14:39:51 -0500
> From: swampcreek42 <swampcreek42 at yahoo.com>
> To: C320-List at Catalina320.com
> Subject: [C320-list] Cockpit Speaker Placement
> Message-ID: <8bjqlltvnlbx1i4rvrfpynh5.1456083591256 at email.android.com>
> Content-Type: text/plain; charset=utf-8
> 
> I have pretty much zeroed in on a stereo system, an Alpine mechless that will utilize RF remote system by way of RF signal reader plugged into the units steering wheel control port.? ? Now, speaker placement in cockpit. I would really like to mount box speakers under the observation seats (or rail seats as some call them) but mine have no holes in the rails for a wire run. Where are the holes placed in the boats that have these? I understand I'll drill between the mount point screws of the aft rail to get the wire into the rail, drill somewhere up under the seat for the wire to exit and then with a vacuum cleaner suck a messenger string through the rail. A with taped or tied to the string will then make the run. I just don't want to drill the rail under the seat in the wrong place and comprimize the integrity of the seat rail....Yeah, a little long winded.Bruce Hunter?Nauti Time #719?
> 
> -------- Original message --------
> From: Elizabeth Schwartz <schwartz781 at optonline.net> 
> Date: 02/16/2016  9:55 PM  (GMT-05:00) 
> To: C320-List at Catalina320.com 
> Subject: Re: [C320-list] Stereo 
> 
> 
> 
> End of C320-list Digest, Vol 2547, Issue 1
> ******************************************