Hsun HS700UTV - Measuring the Compression Pressure

3-10
9. Lower the cargo bed.
10. Install:
·console
·passenger seat
·driver seat
Refer to “SEATS” in chapter 5.
MEASURING THE COMPRESSION PRESSURE
Note :
Insufficient compression pressure will result in a
loss of performance.
1. Start the engine and let it warm up for several
minutes.
2. Stop the engine and remove the spark plug.
3. Assemble the compression pressure meter ①
and joint utensil ② on the hole of the spark plug
4. check
standard value
standard compression pressure data
1200Kpa(12kg/c)-1000r/min
5. read the highest data on the compression
pressure meter
·Above the maximum pressure:
Check the cylinder head, valve surfaces, and
piston crown for carbon deposits.
·Below the minimum pressure:
check the accumulation carbon in the firebox of the
cylinder head and accumulation carbon on the piston
head.
·Refer to the table below.
Compression pressure(with oil introduced into
cylinder)
Reading Diagnosis
Higher than
without oil
Worn or damaged pistons
Same as without
oil
Defective ring(s), valves,
cylinder head gasket or
piston is possible.
Compression pressure
(at sea level)
Standard: 1,324 kPa
(13.24 kg/cm2, 188.31 psi)
Minimum: 1,150 kPa