Chapter 2. Yamaha Autolube (Automatic, Separate Lubricating System); What Is Yamaha Autolube; Features Of Yamaha Autulube - Yamaha GT1 Service Manual

YAMAHA AUTOLUB[ -
What is YAMAHA Autolube? • Features of YAMAHA Autolube
CHAPTER 2. YAMAHA AUTOLUBE
(Automatic, Separate Lubricating System)
2-1. What is YAMAHA Autolube?
Conventional two-stroke engines are lubricated
by
oil premixed in gasoline, but YAMAHA's Autolube furnishes an
automatic, separate lubrication system. That is, the oil in a separate oil tank is automatically regulated by the oil
pump ar'ld fed to the engine according to engine speed and load.
Gasoline line
Oil line
Oil pump
Gasoline tank
Throttle cable A
Accelerator grip
Throttle cable B
line
Fig. 2-1-1
2-2. Features of YAMAHA Autolube
The oil pump is driven by the engine through a reduc-
tion gear, and is connected to the carburetor throttle
cable, _which in turn is controlled by the accelerator
grip. The oil pump automatically regulates the volume
of lubricating oil according to engine speed and throttle
valve opening, thus pumping the precise amount of oil
for engine lubrication under any operating condition.
This "automatic, separate lubrication" does not merely
eliminate disadvantages in the conventional pre-mix
system, but it further improves the performance and
efficiency of two-stroke designs by eliminating certain
oil-starvation conditions which formerly existed.
- 8 -
A) The Autolube feeds an optimum amount of
lubricating oil to the engine under any operating
condition, thus featuring:
Bl
C)
. .
. . . .
. .
. . . .
. .
Less oil consumption .
Less carbon accumulation.
Less exhaust smoke .
l mp roved lubricating efficiency .
The Autolube simplifies fuel supply, thus featur-
ing:
Using straight gasoline directly in the gas tank .
Less fuel contamination .
The Autolube improves the reliability of lubrica-
tion, thus eliminating:
Special care concerning oil/fuel mixing ratio .