[C320-list] Engine noise

Tue Jul 17 15:48:58 PDT 2007

Thanks for the Info.............

Cheers,

Dick Walker
C-320 (687) WindWalker II
740 Olive Ave.
Coronado, CA 92118-2136
619.435.8986

-----Original Message-----
From: c320-list-bounces at catalina320.com
[mailto:c320-list-bounces at catalina320.com] On Behalf Of
myron-welch at uiowa.edu
Sent: Tuesday, July 17, 2007 2:46 PM
To: 320-List
Subject: Re: [C320-list] Engine noise

Someone on this mentioned last year that if you have the old stlye  
PSS, the company will send you the new part to convert to the water  
feed, which I believe is all they now sell.  I contacted them and they  
promptly sent the part and installation instructions with pictures at  
no charge for the part or postage.  I hated tearing the thing apart  
again, but is a better system, especially considering the boat dollars  
expended!

Myron Welch
Wind Instrument, #238
Iowa City, Iowa

Quoting jonvez at comcast.net:

> One other note on the PSS--If you have the old style (the one   
> without a water feed) like I do, I pretty much burp it before I go   
> out if I haven't had the boat out for a week or so. I've found that   
> it isn't just a diver that can displace water with air and   
> apparently on our hulls for whatever reason this is not uncommon.   
> Anyway, as others have indicated, burping is an easy procedure and   
> it goes a long way in ensuring their are no issues with the seal   
> getting hot.....
>
> Regards,
>
> Jon
>
> -------------- Original message --------------
> From: "james_delong" <james_delong at bellsouth.net>
>
>> Jeff, Stan, and Jon,
>>
>> Thanks for the explanations! I do have a PPS. For awhile things were
really
>> funky out there, so prop cavitations could have been occurring. After
>> unsuccessfully attempting to duplicate the problem at the dock I'd guess
my
>> approach will be to go on with life and assume all is well!
>>
>> Jeff...how do I burp the PSS if this happens again?
>>
>> Thanks to all again!!
>>
>> Jim
>>
>> ----- Original Message -----
>> From: "Jeffrey Hare"
>> To: "'C320-List'"
>> Sent: Monday, July 16, 2007 9:01 AM
>> Subject: Re: [C320-list] Engine noise
>>
>>
>> > Jim,
>> >
>> > If you do have a PSS and notice this sound, go down below and see if
the
>> > PSS is warm, and burp it to see if there's any air in there. If it has
>> > plenty of water in it, then it's less likely to chatter. Without water,
>> > it
>> > can chatter under the right circumstances.
>> >
>> > Another possibility is that a shaft zinc has loosened up and slid down
>> > against the cutlass.
>> >
>> > Final thing I could think of is that if you have a bronze shaft and the
>> > alignment is not quite perfect, you could be experiencing shaft whip
when
>> > the right combination of prop loading and RPM are hit. Worn engine
mounts
>> > would help make this worse.
>> >
>> > FYI: As for the RPM, 2900-3000 is really the Yanmar's sweet spot on the
>> > power curve and as Jon said, can run for days at a time there. Contrary
>> > to
>> > what seems intuitive, running the engine at lower uses significantly
more
>> > fuel, not less as would be the case for a gas engine. (From a study
>> > looking
>> > at Diesel-alone vs. diesel-electric efficiency)
>> >
>> > -Jeff
>> >
>> > -----Original Message-----
>> > From: c320-list-bounces at catalina320.com
>> > [mailto:c320-list-bounces at catalina320.com] On Behalf Of Stanley
Rogacevicz
>> > Sent: Monday, July 16, 2007 8:34 AM
>> > To: C320-List
>> > Subject: Re: [C320-list] Engine noise
>> >
>> > Jim,
>> > Again IF you have a PSS I'll just state Jon's post a bit differently -
>> > In
>> > following seas - I sometimes got a horrible sounding vibration from the
>> > PSS
>> > when really trying to make some time surfing the waves relieved by a
>> > throttle adjustment.
>> > Also if you are heading - into - big seas that are sending foam to your
>> > stern you can sometimes hear a different 'growling' sound as the Prop
>> > Cavitates - fixed, folding, whatever, PSS or not.
>> > Stan
>> >
>> >>>> 7/16/2007 8:19 AM >>>
>> > Jim,
>> >
>> > Could be cavitation from the prop, which can happen in rough seas or if
>> > the
>> > boat is outrunning the rpms. If you have a PSS, it can chatter when
>> > bouncing
>> > around sometimes. I've had this happen and have done what you
did...ease
>> > back the throttle, make sure everything else is okay and continue....
>> >
>> > Regards,
>> >
>> > Jon Vez
>> >
>> > -------------- Original message --------------
>> > From: "Jim DeLong"
>> >
>> >> Wondered if anyone else has experienced this engine noise?
>> >>
>> >> While in the ocean a couple of days ago, trying to outrun a squall, a
>> >> crew member cranked up the RPM's to 3000. More that I'm normally
>> > confortabe with.
>> >>
>> >> After 15 minutes or so, the normally smooth engine (Yanmar 27 HP)
>> >> began to sound like metal grinding. Pulled the RPM's bact to 2200 and
all
>> > was well.
>> >> Cranked it up again and after 15 minutes it started again. No other
>> >> symptoms at all. Ran well but just sounded funky. In port yeaterday we
>> >> started the engine and ran it up to 3000. Could not get it to do it
>> >> again.
>> >>
>> >> Thought it may be from the transmission or a slipping shaft, but the
>> >> prop seemed to turn just fine.
>> >>
>> >> Anyone experience this one?
>> >>
>> >> Thanks,
>> >> Jim DeLong #453
>> >>
>> >>
>> >
>> >
>> >
>> >
>> >
>>
>>
>