[C320-list] exhaust blockage

[Jeff Hare]

The "L" and the elbow were cast but I don't think they were stainless, the threaded coupler was certainly stainless.

The parts looked exactly like these except that the raw water fitting on ours was reused and was not a straight tube, but rather came out into a 90 degree bend.

http://tinyurl.com/ExhaustElbow

-Jeff


-----Original Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Steve Turbis
Sent: Friday, November 20, 2015 3:32 PM
To: C320-List at catalina320.com
Subject: Re: [C320-list] exhaust blockage

Thanks I plan to give it a try. By the way did you use stainless steel elbows?

On Fri, Nov 20, 2015 at 12:26 PM, Jeff Hare <Catalina at thehares.com> wrote:

> It's really an easy job.
>
> You'll need the exhaust elbow, the threaded stainless coupler and the "L"
> shaped exhaust port casting that mounts to the back of the engine.  I 
> got those three parts from the local Yanmar dealer and they were under $500.
> The other part you'll need is a short length of exhaust hose.  The 
> corrugated/flexible exhaust hose is really easy to work with and won't 
> put nearly as much stress on the muffler.  Don't reuse the one you 
> have, new hose makes the job easy.
>
> - Remove the exhaust cooling line (raw water) that feeds in near the 
> top of elbow.
> - Remove the hose clamps from the Exhaust hose that enters the muffler.
> - Unbolt the 4 bolts on the cast exhaust assembly from the back of the 
> engine block.
> - If the assembly will twist and come off the muffler, great.  If not, 
> slice the exhaust hose with a utility knife and peel the hose off the 
> muffler fitting carefully.  Take this hose with you when getting a 
> replacement.
> - Remove the exhaust hose from the elbow assembly, but don't separate 
> or try to reuse any parts of the exhaust elbow.  It's more useful to 
> keep it just like it is so that you can assemble the new one and match 
> the same angles.  Then the new assembly will just drop in place.
> - You will probably need to remove/reuse the little bronze(?) fitting 
> from the old assembly that the raw water cooling line plugs into.  My 
> new one didn't have this.
> - I used pipe sealant compound when assembling the new exhaust elbow, 
> but a half dozen wraps of PTFE/Teflon tape would work also.  A vice 
> helps hold parts when assembling the new unit.
>
> I think I had the whole thing put back in the boat really quickly once 
> I got the parts.  It's not difficult at all.
>
> Finally, use a sharpie and write the year on all the parts you 
> changed, so that the next owner of the boat will know how old they 
> are.  :)
>
> -Jeff Hare
> #809
> Woodbine II
> Newburyport, MA
>
>
> -----Original Message-----
> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On 
> Behalf Of Steve Turbis
> Sent: Friday, November 20, 2015 1:31 PM
> To: C320-List at catalina320.com
> Subject: [C320-list] exhaust blockage
>
> Has anyone had this problem. I can't get my Yanmar diesel over 1700 
> RPMs and my mechanic says I have to replace the elbow and manifold 
> because typically this engine builds up soot in this area and the 
> motor can't function properly because exhaust keeps backing into the 
> motor. Any ideas if this is true? He wants to charge about $1000 to repair it.
>
> Steve
> "AT LAST"
> Dana Point Ca
>
>