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
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