I took the elbow out. But before I did I ran the engine with the hose to the elbow off. Water came out but at idle but it did not seem like it was sufficient. More a dribble than a stream. Also, there was some sand like residue in the water leading me to think that the exchanger may need some attention. With the elbow off it should not be too difficult to at least clean it out.
Tom Buscaglia S/V Alera 1990 C&C 37+/40 Vashon WA P 206.463.9200 C 305.409.3660 > On Dec 29, 2019, at 3:27 PM, Tom Buscaglia <t...@sv-alera.com> wrote: > > Backwashing was a great idea. I put a cone shaped nozzle with a built in > ball valve on the hose and rag wrapped it then flushed the intake from the > strainer. It seems fine. Then I pulled the hose off the front of the heat > exchanger and water came out when I ran the engine. Next, I put the hose on > the intake to the exchanger...it backed up even after a shut off the water. > > My conclusion - the issue is either the heat exchanger or the riser. Pulling > the hose off the riser. It was replaced About 500 hours ago but I guess that > may need to be done again. > > If that’s the issue, I’m going to stainless. > > Tom B > > Typoed from my iPhone > > Tom Buscaglia > Alera 1990 C&C 37+/40 > Vashon Island WA > O 206.463.9200 > C 305.409.3660 > Skype - thombusc > >> ------------------------------ >> >> Message: 4 >> Date: Sun, 29 Dec 2019 14:33:28 -0500 >> From: Stephen Thorne <stephenltho...@gmail.com> >> To: cnc-list@cnc-list.com >> Subject: Re: Stus-List Raw Water Blocked >> Message-ID: >> <cafcs31okwmiodskudt6y38tdfccjv4thdflhivzeexgsi1y...@mail.gmail.com> >> Content-Type: text/plain; charset="utf-8" >> >> It?s also possible the exhaust elbow has become corroded. I had to replace >> one because of same issue. >> >> Steve Thorne >> Deja Vu >> >>> On Sun, Dec 29, 2019 at 1:05 PM John and Maryann Read via CnC-List < >>> cnc-list@cnc-list.com> wrote: >>> >>> Tom >>> >>> What engine do you have? Fresh or raw water cooled? Common issue for >>> Yanmar is exhaust riser getting plugged by carbon etc where water enters. >>> Will also impact engine performance. Disconnect hose where enters exhaust >>> riser. If water streams, then you have your answer. Also check the >>> fitting where hose attaches to riser ? is clear?? If not, best place is >>> check if any blockage at intake or strainer ? maybe something got into and >>> plugged the hose?? A friend?s hose inlet has less than ideal configuration >>> and frequently sucks up eel grass and such and plugs the inlet hose. >>> Another culprit might be the pump impeller lost a vane and is stuck in the >>> system before the strainer. >>> Just some thoughts and good luck >>> >>> John and Maryann >>> Legacy III >>> 1982 C&C 34 >>> Noank, CT >>> >>> >>> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Tom >>> Buscaglia via CnC-List >>> *Sent:* Sunday, December 29, 2019 12:15 PM >>> *To:* cnc-list@cnc-list.com >>> *Cc:* Tom Buscaglia >>> *Subject:* Stus-List Raw Water Blocked >>> >>> Alera has a blockage somewhere in the raw water system. Nothing out the >>> exhaust. >>> >>> I checked the intake and the pump. Both seem fine. But, there seems to >>> be no flow at the strainer. >>> >>> I am wondering if there is some maintenance needed for the vented loop? >>> It is the next link in the chain and I?m running out of links. >>> >>> Tom Buscaglia >>> S/V Alera >>> 1990 C&C 37+/40 >>> Vashon WA >>> P 206.463.9200 >>> C 305.409.3660 >>> _______________________________________________ >>> >>> Thanks everyone for supporting this list with your contributions. Each >>> and every one is greatly appreciated. If you want to support the list - >>> use PayPal to send contribution -- https://www.paypal.me/stumurray
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