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YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
Cylinder Assembly Inspection Checklist for YO-233-B2A Engine Models (Cont.)
Item to Examine and Corrective
Action
Look for rust/pitting on:
• Cylinder barrel fins and fin tips
in power stroke areas
• Cylinder barrel and base flange
Corrective Action:
Replace the cylinder if rust/pitting
is found
Do not grind the cylinder bore
to remove pitting or damage
caused by overheating.
Look for discolored/burnt paint or
scored cylinder barrel bores. Look
for blistered paint on the cylinder
barrel.
Corrective Action:
Replace the cylinder if the
cylinder barrel bores are scored or
the paint is discolored/burnt/
blistered.
Examine the threads in all
threaded holes in the cylinder for
debris or damage.
Corrective Action:
Use the correct size bottoming tap
to clean the threads.
If thread damage cannot be
corrected with the tap, replace the
cylinder.
Examine the exhaust flange for
damage or warping.
Corrective Action:
Replace the cylinder if the
exhaust flange is warped or
damaged.
Do not grind or repair the
exhaust flange to correct a bent
or warped flange.
© 2021 Avco Corporation. All Rights Reserved
February 2021
Cylinder
No.
Cylinder 1
Cylinder 2
Cylinder 3
Cylinder 4
Cylinder 1
Cylinder 2
Cylinder 3
Cylinder 4
Cylinder 1
Cylinder 2
Cylinder 3
Cylinder 4
Cylinder 1
Cylinder 2
Cylinder 3
Cylinder 4
Findings / Corrective Action
72-30
Page 115
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