[C320-list] Yanmar engine Throttle Adjustment

[millers1 at aol.com]

My engine throttle slowly creep/slips back  from higher RPM settings to about 2500rpm.
I see no readily apparent way to adjust (increase ) the engine throttle drag.  Has anyone had this 
problem and how was it corrected??? A small bungee cord works....... but...

Art Liberty  #680



-----Original Message-----
From: Gene Helfman <genehelfman at gmail.com>
To: C320-List <C320-List at catalina320.com>
Sent: Sat, May 18, 2013 2:53 pm
Subject: Re: [C320-list] Removing the Maxwell 500


Thanks, Scott.  That's exactly what I needed to know.  I managed to get a
Maxwell rep on the phone who basically said the same thing.  I had tried
prying the old drum off with a screw driver with no luck.  He suggested
banging on several wooden wedges spaced around the drum base after blasting
the drum with a heat gun.  I'm waiting for the rain to stop to give that a
try.  Also, removing the cir-clips that hold the drum shaft in place is
supposed to ease the removal process.

I've spent a couple of hours on my back in the V-berth.  We finally decided
to remove a one foot by one foot section of the non-structural  fiberglass
wall to which the plywood attaches to increase access to the area where the
windlass gear box, etc live.  This gave more working room for playing with
the old unit and should make installation of the new windlass easier.  I
will probably use the removed section for beefing up the outer attachment
area for the new windlass since it has a larger footprint than the old 500.

gene


On Fri, May 17, 2013 at 3:34 PM, Scott Thompson <surprise at thompson87.com>wrote:

> These links to documents I put on the Association website a long time ago
> might be helpful:
>
> Exploded parts view: http://www.catalina320.com/**
> filemgmt/index.php?id=112<http://www.catalina320.com/filemgmt/index.php?id=112>
> Manual: http://www.catalina320.com/**filemgmt/index.php?id=113<http://www.catalina320.com/filemgmt/index.php?id=113>
>
> The former is for the VC500 model (no chain gypsy) and the latter is for
> the VW500 model, which includes a chain gypsy, but my understanding is that
> the drum assembly is the same on both models. The VW500 model has a longer
> shaft and a few extra parts. Based on your description I suspect you have
> the VC500.
>
> I believe that the drum should NOT turn when rotated with a pipe wrench
> because it is keyed to the shaft and shaft rotation is more or less
> impossible because of the use of a worm gear in the transmission. But
> rotating it is not required for removal. Rather you need to move it off the
> shaft without rotating it, i.e. by moving it parallel to the shaft and
> internal key. In other words, it should just slide off the shaft. If the
> drum won't move parallel to the shaft there could be internal corrosion or
> sand preventing it from sliding on the shaft.
>
> What I would do is insert a lever (try a large screwdriver at first)
> between the drum and mounting plate and try to pry the drum away from the
> mounting plate. If that fails try levering in more than one place, or get a
> bigger lever. When it moves, it will probably give all at once, so arrange
> for some protection of the gelcoat in case it goes flying off the shaft
> with gusto. Also avoid using the fiberglass itself as a fulcrum. You want
> the intense point-loading to be entirely metal to metal.
>
> I don't think it is possible to remove the windlass in one piece, or to
> remove it without first removing the drum, even with a willingness to do
> damage to the windlass. The problem is that the motor / transmission is on
> one side of the bulkhead but is bolted to the mounting plate on the other
> side, and the bolts are hidden by the drum. You need to remove the drum,
> then the bolts holding the motor, then the motor itself (which requires
> access to the rear, obtained by removing the plywood panel from the front
> of the V-berth and then lying on your back looking upward), and only then
> the mounting plate.
>
> Been there.
>
> Scott Thompson
> Surprise, #653
>
>
> On 5/16/2013 10:27 PM, Gene Helfman wrote:
>
>> We've decided to replace our non-functional Maxwell 500 (1997 c320) with a
>> newer, larger model with a chainwheel, the Maxwell VW10.  I'm now trying
>> to
>> get the old 500 out and am stuck.  Does anyone know how to remove the rope
>> drum?  I've taken off the outer cap, screw, and washer and can't figure
>> out
>> what to do next.  It doesn't help that the drum appears to be frozen in
>> place and can't be rotated, even with a pipe wrench.  I'm not afraid of
>> breaking things if necessary, although if I can get the whole thing off
>> the
>> boat in one piece I'd be happy to offer it up to anyone gratis for spare
>> parts.
>>
>> gene
>>
>> *Satori*, #398
>>
>>
>


-- 
Gene Helfman, Professor Emeritus
Odum School of Ecology, University of Georgia
PERMANENT address:
    498 Shoreland Dr., Lopez Is., WA 98261
    (360) 468-2136
    genehelfman at gmail.com

"You noticed nobody gives a damn about beached minnows."