84
c) OVERSIZED PISTONS FOR 4-STROKE ENGINES
As in all engine production Tecumseh occasionally pro-
duce cylinders bored above maximum allowable tolerance.
In this case .010” oversize piston and rings will be fitted.
These components may be identified by the figure 1
stamped on both cylinder and piston. The drawing shows
location of these marks on 4-stroke engine components.
(Fig 45).
d) PISTON AND RINGS
Piston rings must be fitted with tapers upwards (on
compression rings) and expander under the scraper rings
(Fig 46).
On some engines (LAV 172, HBP 40, BHG) the second
compression ring is of L configuration and is fitted as per
Fig 47.
On some types a spring is mounted under the oil scraper
ring (HBP 40) in this case the third groove is deeper than
normal (Fig 48).
NOTE - Always select parts according to correct parts
list.
Fig. 45
Fig. 46
Fig. 48
Fig. 47
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