[C320-list] New shaft

[Jim Brown]

You can check if the vibration is in the motor mounts pretty easily.
Uncover the engine and (watch out for the belts and pulleys) put a longish
pry bar or big screw driver in the motor mount. Pull up hard. You'll be
surprised about how much they raise up. With the motor mount stressed
throttle up and if it is a mount the vibration should be gone or much
better. Do each mount individually. Mine (2004) are very weak and when
throttling down to idle it sounds like a bucket of bolts just above idle
speed when there is significant vibration. With the mounts stressed-no
noise at all. Getting ready to replace them . I believe that yanmar
recommends replacement every 4-5 years (I suspect nobody does that).

Jim Brown


On Mon, Jun 16, 2014 at 4:35 PM, <jsheets at aol.com> wrote:

> Probably around 800 - 1000.
>
> Jerry
>
> > On Jun 16, 2014, at 3:11 PM, <tharrison at innovations-plus.com> wrote:
> >
> > Just wondering what is you starting RPM"s
> >
> > Ted - hull 424
> >
> > -----Original Message-----
> > From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On
> Behalf
> > Of Andrew Santangelo
> > Sent: June-16-14 2:30 PM
> > To: C320-List at Catalina320.com
> > Subject: Re: [C320-list] New shaft
> >
> > Jerry,
> >
> > It could be related tot he cutlass bearing.  I have had this replaced 3
> > times over the last 18 years on Dawn Treader.  I also had a drive saver
> > installed for the Autoprop and it saves on wear and tear with the engine.
> >
> > Andrew Santangelo
> >
> > C320 "Dawn Treader"
> > #333
> > Holland, MI
> >
> > J22 "Blitzkrieg"
> > Elephant Butte, New Mexico
> >
> >
> >
> >
> >> On Jun 16, 2014, at 2:26 PM, jsheets at aol.com wrote:
> >>
> >> I recently had a new prop shaft installed due to some previous problems
> > with the old shaft. Since installed, on two occasions I have had a strong
> > vibration of the shaft and transmission when starting out at low speeds.
> > Once given more throttle it works itself out. Does not do it when slowing
> > down from higher speed, only in early acceleration. Mechanic is convinced
> > the alignment is correct. Says he thinks part of the problem is the motor
> > mounts Yanmar uses, allowing for too much movement of the motor. Any
> > thoughts or similar experience anyone can share is appreciated.
> >>
> >> Jerry
> >>
> >> JellyRoll  #890
> >
> >
>