[C320-list] exhaust blockage

[Steve Turbis]

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
>
>