Saito FA-30S (H) Instruction Manual page 6

4
S T A R T I N G
Break-In
The first run on any engine, whether
2-cycle or 4-cycle, is critical to the
future of the engine itself. During this
time, metal mating parts (piston and
cylinder, ball bearings, etc.) wear in.
Care must be taken that the engine is
clean and free of any dust or grit that
may have accumulated while building
the model.
There are two accepted methods for
breaking in a new engine: test stand
mounted and run or aircraft mounted
and run. Either method is acceptable:
however, mounting the engine to a test
stand allows the engine to be observed
throughout its operation, as well as
elevating it above the ground and away
from harmful dust and dirt.
Note: Because your engine may have
been sitting for an extended period of
time prior to running it, a few drops of
light oil applied through the crankcase
breather nipple (19 on the exploded
view) and down the push-rod tubes
(40) will ensure proper lubrication for
the first run.
Regardless of the mounting methed
chosen for break-in, the following
procedures are applicable:
1. Use of a fuel as described in the
"Support Equipment" section on
page 3 of this manual for "break-in"
purposes is perfectly acceptable.
T H E E N G I N E
2. Your engine includes the Saito SS
SAIP 400S glow plug. The Hangar 9
(tm) Four Cycle Super Plug (HAN3011)
is a standard replacement to use in
these engines.
3. To select the correct propeller, refer
to the "Propeller Selection" chart on
page 16 of this manual. Remember to
balance the propeller prior ot use.
4a. For all .30 to .91 engines, ensure
that the high speed needle valve (85) is
opened (turned counter-clockwise) two
and 1/2 turns out. This guarantees a
very rich setting.
4b. For all 1.00 to 1.25 engines, ensure
that the high speed needle valve (85) is
opened (turned counter-clockwise) 5
turns out. This guarantees a very rich
setting.
Do not adjust the low-speed needle
valve (89) at this time. The low-speed
needle valve is preadjusted at the
factory for initial break-in. Specific
instructions for adjusting the idle
of engines (FA-30S(H)) using an
"air-bleed" type carburetor will be
described in the section "Carburetor
Adjustments forAir Bleed
Carburetors" on page 7.
5. The use of a tachometer is highly
recommended since the adjustment of
a 4-cycle engine, while similar to that
of a 2-cycle engine, is more difficult to
"set by ear," making it much easier to
damage the engine by "over-leaning."