Kubota G23 User Manual

ENGINE
G23, G26, WSM
1-S15
(EU)
4. CHECKING, DISASSEMBLING AND SERVICING
[1] CHECKING AND ADJUSTING
(1) Engine Body
Compression Pressure
1. Run the engine until it is warmed up.
2. Stop the engine.
3. Remove the air cleaner, the muffler and all glow plugs (or
nozzles).
4. Set a compression tester with the adaptor to the glow plug hole
(or nozzle hole).
Nozzle hole : Adaptor H (07909-31231)
Glow plug hole : Adaptor L (07909-31301)
5. Disconnect the connector of engine stop solenoid and keep the
engine stop position (non-injection). Then, run the engine with
the starter and measure the compression pressure.
6. Repeat steps 4 and 5 for each cylinder.
7. If the measurement is below the allowable limit, apply a small
amount of oil to the cylinder wall through the glow plug hole (or
nozzle hole) and measure the compression pressure again.
8. If the compression pressure is still less than the allowable limit,
check the top clearance, valve clearance and cylinder head.
9. If the compression pressure increases after applying oil, check
the cylinder wall and piston rings.
NOTE
• Check the compression pressure with the specified valve
clearance.
• Always use a fully charged battery for preforming this test.
• Variances in cylinder compression values should be under
10 %.
[G23]
[G26]
9Y1210294ENS0005US0
Compression pressure
Factory specification
3.53 to 4.02 MPa
36.0 to 41.0 kgf/cm
2
512 to 583 psi
Allowable limit
2.55 MPa
26.0 kgf/cm
2
370 psi
Compression pressure
Factory specification
3.73 to 4.11 MPa
38.0 to 42.0 kgf/cm
2
541 to 596 psi
Allowable limit
2.26 MPa
23.0 kgf/cm
2
328 psi
KiSC issued 08, 2009 A

Kubota G23 Specifications

General

Brand	Kubota
Model	G23
Category	Lawn Mower
Language	English