SV200 R200
4/2007© by GLOBAL GARDEN PRODUCTS
6.9 ENGINE BLOCK – External operations
GENERAL INFORMATION
This chapter covers the checking, adjustment and
replacement operations of components that do not
require the engine being removed from the lawn-
mower to which it is fitted.
Removing the engine from the machine and the dis-
mantling and replacement operations for thermal
components are described in chapter 6.10.
SERVICING PROCEDURES
A) Checking the compression
1Remove the cap (1) and take out the spark plug
(2).
2 Screw the terminal of the compression testing
tool (3) into the spark plug hole and connect the
supply pipe to a compressed air socket with a
pressure of approximately 4.2 Bars (60 psi).
3On opening the air tap (4), the manometer
gauge on the engine side should position itself
in the green zone and remain there for about 30
seconds. If the gauge falls rapidly it means that
the compression is poor.
NOTE - Lack of compression could be due to:
– incorrect valve clearance [
6.9.B];
– cylinder head loose or cylinder head gasket
worn [
6.9.C].
– lack of seal in the valves [
6.9.D];
– piston rings worn [
6.10.C].
4 Remount the spark plug (2) and tighten it to the
specified levels.
B) Adjusting the valve clearance
NOTE
- The adjustment must be made with the
engine is cold.
11 Remove the spark plug and the cover (11) fixed
by four screws (12).
12 Manually set the piston to the TDC (Top Dead
Centre) of the compression stroke so that both
valves are closed.
6.9.1
ENGINE BLOCK – External operations
1 / 7
SERVICE MANUAL
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