ME(H6DO)-22
Compression
MECHANICAL
2. Compression
A: INSPECTION
CAUTION:
After warming-up, engine becomes very hot. Be
careful not to burn yourself during measure-
ment.
1) Remove the collector cover.
2) After warming-up the engine, turn the ignition
switch to OFF.
3) Make sure that the battery is fully charged.
4) Release the fuel pressure. <Ref. to FU(H6DO)-
43, RELEASING OF FUEL PRESSURE, PROCE-
DURE, Fuel.>
5) Remove all the spark plugs. <Ref. to IG(H6DO)-
4, REMOVAL, Spark Plug.>
6) Fully open the throttle valve.
7) Check the starter motor for satisfactory perfor-
mance and operation.
8) Secure the compression gauge tightly against
the spark plug hole.
NOTE:
When using a screw-in type compression gauge,
the screw should be less than 18 mm (0.71 in) long.
9) Crank the engine by means of the starter motor,
and read the maximum value on the gauge when
the pointer is steady.
10) Perform at least two measurements per cylin-
der, and make sure that the values are correct.
Compression (350 rpm and fully open throttle):
Standard:
1,275 — 1,471 kPa
(13.0 — 15.0 kgf/cm
2
, 185 — 213 psi)
Service limit:
1,128 kPa (11.5 kgf/cm
2
, 164 psi)
11) After inspection, install the related parts in the
reverse order of removal.
ME-00446