EY35, EY40 - Small Engine Discount

4-5 CAMSHAFT
Models EY3S-B, 3S-BS, EY40-B and 40-BS have intake and
exhaust cams of forged carbon steel, which are fitted with a
cam gear under pressure. The assembly serves as output shaft
that is driven at one half the speed of the crankshaft. The
cam gear has a governor fitted to it.
Model EY35-D, 35-DS, EY40-D and 40-DS have a camshaft
of special cast iron, which is integrally assembled with a cam
gear. The two ends of the shaft serve as plain bearings so no
ball bearings are used.
(See Fig. 6.)
Fig. 6
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4-6 CYLINDER HEAD
The cylinder head is an aluminum die casting, and forms a
Ricardo type combustion chamber with ample area for high
combustion effeciency. The spark plug is tilted for easy
mounting of the fuel tank.
(See Fig. 7.)
Fig. 7
4-7 VALVE ARRANGEMENT
The exhaust valve is located upstream of the cooling air with
the result that the exhaust valve is intensively cooled for
improved engine durability. The inner side of the valve head
is reinforced with hard alloy fused to it for added durability.
(See Fig. 8.)
. "
. ". .._ _.
Fig. 8
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