General; Prestarting Items Of Maintenance; Starting Procedures - Lycoming O-320 76 Series Operator's Manual

LYCOMING SERIES OPERATOR'S MANUAL
O-320
1. GENERAL. Close adherence to these instructions will greatly contribute to long life, economy and
satisfactory operation of the engine.
YOUR ATTENTION IS DIRECTED TO THE WARRANTIES THAT APPEAR IN THE
FRONT OF THIS MANUAL REGARDING ENGINE SPEED, THE USE OF SPECIFIED
FUELS AND LUBRICANTS, REPAIRS AND ALTERATIONS. PERHAPS NO OTHER
ASPECT OF ENGINE OPERATION AND MAINTENANCE CONTRIBUTES QUITE SO
MUCH TO SATISFACTORY PERFORMANCE AND LONG LIFE AS THE CONSTANT USE
OF CORRECT GRADES OF FUEL AND OIL, CORRECT ENGINE TIMING, AND FLYING
THE AIRCRAFT AT ALL TIMES WITHIN THE SPEED AND POWER RANGE SPECIFIED
FOR THE ENGINE. DO NOT FORGET THAT VIOLATION OF THE OPERATION AND
MAINTENANCE SPECIFICATIONS FOR YOUR ENGINE WILL NOT ONLY VOID YOUR
WARRANTY BUT WILL SHORTEN THE LIFE OF YOUR ENGINE AFTER ITS WARRANTY
PERIOD HAS PASSED.
New engines have been carefully run-in by Lycoming and therefore, no further break-in is necessary
insofar as operation is concerned; however, new or newly overhauled engines should avoid low power
below 65%, during the first 50 hours or until the oil consumption has stabilized. The engine should also be
operated on straight mineral oil for a minimum of 50 hours or until the oil consumption has stabilized. After
this period a change to an approved additive oil Ashless Dispersant MIL-L-22851 may be made, if so
desired.
Cruising should be done at 65% to 75% power until a total of 50 hours has been
accumulated or the oil consumption has stabilized. This is to insure the proper seating of the
rings and is applicable to new engines and engines in service following cylinder replacement
or top overhaul of one or more cylinders.
The minimum fuel octane rating is listed in the flight chart, Part 9 of this section. Under no circumstances
should fuel of a lower octane rating or automotive fuel (regardless of octane rating) be used.
2. PRESTARTING ITEMS OF MAINTENANCE. Before starting the aircraft engines for the first flight of the
day, there are several items of maintenance inspection that should be performed. These are described in
Section 4 under Daily Pre-Flight Inspection. They must be observed before the engine is started.

3. STARTING PROCEDURES.

The following starting procedures are recommended; however, the starting characteristics of various
installations will necessitate some variation from these procedures.
SECTION 3
OPERATING INSTRUCTIONS
NOTE
NOTE
SECTION 3
OPERATING INSTRUCTIONS
3-1