If you have an older CKT there were some weld issues.
The 912S is a rougher engine and the exhaust system will shake. If the crack
was
near the spring attachment it is a weld problem.
Another issue is drilling of EGT holes. Stress risers happen.
If the muffler is hitting the frame the down tube can be stressed in bending and
crack.
Wrong kinds of springs can be a problem also, but the springs break before the
tube normally.
Sometimes we just don't know. Contact Robin at CKT. They will take care of
you.
Best Regards,
Bud Yerly
-----Original Message-----
From: owner-europa-list-server@matronics.com
<owner-europa-list-server@matronics.com>
On Behalf Of JonathanMilbank
Sent: Friday, April 23, 2021 3:17 PM
Subject: Europa-List: CKT exhaust header tube needed, please.
Today while approaching to land and after landing, the engine sounded quite a
lot
different. After removing the cowls, the header tube for right rear #3 cylinder
was seen to have cracked circumferentially completely around. Rather than
weld the two parts back together and end up finding further cracking due to the
weld, I'd rather just replace the tube with one that is whole.
The carburettors are maintained well balanced with a CarbMate electronic
balancer
and the Airmaster propeller runs nice and smooth as well. This crack has
appeared
after more than 4 years in service, so I'm not dissatisfied.
Thanks,
Jonathan
G-EIKY Classic tri-gear
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