[C320-list] Diesel/exhaust smell in odd places

[Ted Harrison]

This is great information. Thank you

Ted Harrison
Whitby Ontario. Hull 424

> On Aug 16, 2016, at 10:43 AM, Greg Flanagan <greg.flanagan at shaw.ca> wrote:
> 
> Hi Ted,
> 
> Yes I used 4 screws to secure the muffler. The old one only used two (aft). The muffler was predrilled for four. The forward two were tricky. I modified a drill bit to fit a spade bit extension to get by everything.
> 
> I did not change the drain.
> 
> I would be happy to provide my drawn over pictures. However, the process is probably more useful. 
> 
> Here is the main problem. 320s were built in California in a plant now closed. They kept no documents regarding muffler production. Now everything including parts is done out of Florida. Virtually every 320 has a one-off custom muffler, depending on a number of factors including the particular engine they installed. CY provided me confidentially 6 proprietary diagrams of replacement 320 mufflers. Not one was even close to mine, even though they look substantially the same.
> 
> So the process:
> I removed the old muffler and labelled it on top and on each side A, F, P, & S. I took a picture of the top for orientation. On a bench I took a photo of each side as square to it that I could. Then in Word I inserted these photos. Using a tape measure, 2 squares, and an angle  tool I measured all of the dimensions, overall height and width, the location of the holes including the centre distance from the base and each side. This needs judgement as these holes come out at angles. I then measured the angle of the input and output tubes both vertically and horizontally. Finally  I stuck my tape in the tubes and measured their overall length and the revealed length. I then added all these measurements onto the photos in my word document using dimension lines and text box. 
> 
> I would NOT recommend choosing a muffler by "looks" from photos. My first effort resulted in a muffler that looked just like mine. But it could not be installed as the input/output tubes were not even close to mine.  I would have had to reconfigure by bed deck and sleep with the outlet tube between my knees. Even worse-the outlet tube was overall only 6" (~3" inside) where mine is 13". This would have resulted in a muffler completely full of water all of the time. 
> 
> Cheers ,
> 
> Greg 
> Hoop Dancer #1076
> Sidney, BC
> 
> 
>> On Aug 16, 2016, at 7:09 AM, pat reynolds <lorasalum at yahoo.com> wrote:
>> 
>> Ted,  When I replaced my muffler, Catalina Parts Dept.  emailed me several photos of mufflers they made and I was able to pick the replacement out  
>> 
>>   On Monday, August 15, 2016 9:32 PM, Ted Harrison <tharrison at innovations-plus.com> wrote:
>> 
>> 
>> Greg, I have a couple of questions.
>> 
>> Would you be willing to share your diagrams and pictures sent to CY? If so please send. 
>> 
>> Did you put screws in the four corners ? 
>> 
>> Did you change the location of the drain? 
>> 
>> Thanks Ted 
>> 
>> 
>> 
>> Ted Harrison
>> 
>>> On Aug 15, 2016, at 9:42 PM, Greg Flanagan <greg.flanagan at shaw.ca> wrote:
>>> 
>>> I have some experience to add on this topic. I just finished replacing my muffler after using the leaking one for all of last season and the start of this one. I had water leaking and all of the smells that Graeme has noted. I did not want to put my boat out of commission last year for the sailing season and ordered a new muffler from Catalina Yachts and had it aboard if things got too severe.
>>> 
>>> First I stopped the auto bilge pump so I could see how much water was coming in and then pumped it out in manual. The amount of water per day gradually increased. Second, I got a carbon monoxide detector for the aft cabin. Although the smell was there the alarm was never triggered. 
>>> 
>>> This Spring I went to install the new muffler. Although it looked the same it was substantially different and could not possibly work. I contacted Catalina. They were stellar, especially Len in parts. I was going to ship them my old muffler so they could match it. Three problems. It was going to cost ~ $300Cdn to ship it. It was going to take weeks, and I would not be able to use the boat. So I worked up detailed drawings/pictures of the old muffler and emailed them to CY, and I put the old muffler back in and used the boat. With Len's help they built me a new muffler exactly the same as my old one. They had it ready and shipped in a week. It fit perfectly and works great. And best of all they did not charge me anything additional to my original purchase.  And notably all of the smells are gone. 
>>> 
>>> One note. I installed the new muffler with self adhesive marine weather strips in the bottom edge of the muffler, where otherwise fibreglass meets fibreglass. I believe this will reduce the vibration that may wear these mufflers out. Also the engine seems much quieter. And not a drop in the bilge!
>>> 
>>> Cheers,
>>> 
>>> Greg 
>>> Hoop Dancer #1076
>>> Sidney, BC 
>>> 
>>>> On Aug 15, 2016, at 1:08 PM, Graeme Clark <cg at skyflyer.co.uk> wrote:
>>>> 
>>>> After the engine has been running we notice a diesel-y exhaust-y smell in aft cabin and also under the galley sink when you open the door or a drawer
>>>> 
>>>> I know the exhaust is not leaking this side of the muffler. Could it be a water leak from muffler or the actual exhaust hose? This would run down to bilges past the galley area I think
>>>> 
>>>> Does "exhaust cooling water" pick up the smell like this?
>>>> 
>>>> Or are all boats the same?
>>>> 
>>>> Graeme
>>>> #366 Jaskar
>>>> 
>>>> Sent from mobile: please excuse typos etc.!
>> 
>>