John
I have never had the exhaust riser inspected....I now know what one is
and what it does (didn't before)) and even if turns out it is something
else, I will be checking or, having checked, the exhaust riser....don't
want or need the damage from one of them to failing if it can be avoided.
Rob
On 2022-06-26 6:04 p.m., John Read via CnC-List wrote:
My first thought is blocked exhaust riser – especially if has been
several years since last checked. Causes high back pressure causing
engine not able to rev to spec
John Read
Legacy III
1982 C&C 34
Noank, CT
*From:*Robert Abbott via CnC-List [mailto:cnc-list@cnc-list.com]
*Sent:* Sunday, June 26, 2022 9:38 AM
*To:* cnc-list@cnc-list.com
*Cc:* Robert Abbott
*Subject:* Stus-List Yanmar 2 GMF
Went to take the boat out Friday for a short sail .....motoring out
heading into a12 knt breeze....started to increase the RPM's and found
the engine wouldn't rev about 2,100 RPM's ....marine diesel's are not
supposed to be that complicated but they are to me. I wouldn't know
where to start to trouble shoot....getting a mechanic to deal with it
this week. I spoke to him and told him the situation and he thinks it
is a fuel problem....engine not getting enough fuel....my fuel tank
and fuel should be clean as I had the bottom of it replaced 2 years
ago and the 2 fuel filters replaced. He thinks one or both of the
filters are restricting the fuel flow.....I hope he is right but I
don't think so.
Possibly many are causes....restricted fuel injectors, fuel pump,
etc. ....the engine has never been serviced in the 16 years I have
had the boat
Any insight or guidance to help greatly appreciated.
Rob Abbott
AZURA
C&C 32 - #277
Halifax, N.S.
