Lycoming YO-233-B2A Maintenance Manual page 17

YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
Scope of this Manual
Although the YO-233-B2A is not certified by the Federal Aviation Administration (FAA), this
manual adheres to guidelines set forth by the FAA for certified engines. It is recommended that all
inspections, procedures, and guidelines in this manual be followed to maintain continued
airworthiness.
This manual supplies instructions for service and maintenance of the Lycoming YO-233-B2A
engine. The information includes required maintenance (service information) for oil changes, oil
addition, oil filter replacement, routine time-interval inspections, routine service, spark plug
replacement/inspection procedures, cylinder inspection, fuel system inspection, scheduled servicing
procedures, fault isolation guidelines, and procedures for component replacement. Refer to the YO-
233-B2A Illustrated Parts Catalog to identify spare parts.
Engine Airworthiness
To operate and maintain this engine in safe and airworthy condition, operators and maintenance
personnel should have access to this manual, the latest revision of the Service Table of Limits - SSP-
1776, and all service documents applicable to this engine model.
WARNING: FOR CORRECT ENGINE MAINTENANCE, COMPLETE THE NECESSARY
MAINTENANCE PROCEDURES IN THIS MANUAL AND APPLICABLE
SERVICE DOCUMENTS. LYCOMING ENGINES' SERVICE DOCUMENTS
WRITTEN AT A LATER DATE OVERRIDE PROCEDURES IN THIS
MANUAL UNLESS OTHERWISE SPECIFIED.
PROCEDURES IN THIS MANUAL MUST BE DONE BY QUALIFIED
PERSONNEL WITH THE REQUISITE CERTIFICATIONS.
Before you do maintenance on the YO-233-B2A engine, read this manual in its entirety. Obey all
procedures and inspections in this manual.
NOTICE: If you do not obey the maintenance procedures in this manual for this engine, you can
void the engine warranty. Please consult your warranty for a full a statement of your
rights, limitations and obligations that exist there under.
Refer to the YO-233-B2A Engine Installation and Operation Manual for engine description,
uncrating procedures, acceptance check, engine lift procedure, engine preservation and storage,
depreservation, engine installation requirements, engine installation, engine start, operation, and stop
procedures, engine initiation, fuels and oil to be used, and operating specifications.
Refer to the latest revision of the Service Table of Limits - SSP-1776, for dimensions, clearances,
measurements, and torque values.
WARNING: OPERATE THIS ENGINE IN ACCORDANCE WITH SPECIFICATIONS IN
APPENDIX A OF THE YO-233-B2A ENGINE INSTALLATION AND
OPERATION MANUAL. OPERATION OF THE ENGINE OUTSIDE OF THE
SPECIFIED OPERATING LIMITS CAN CAUSE PERSONAL INJURY
AND/OR DAMAGE TO THE ENGINE.
Environmental Compliance
Lycoming Engines recommends that engine owners and engine service personnel be in compliance
with all federal, state, and local environmental regulations when solvents, paint, fuel, oil, chemicals,
or other consumables are used in engine service.
© 2021 Avco Corporation. All Rights Reserved
February 2021
Introduction
Page xv