Honda GP200H Manual page 40

ENGINE CRANKS BUT WON'T START
• Check the oil level before troubleshooting (page 3-3).
Loosen the carburetor drain screw and check the
fuel flow from the fuel tank (page 5-3).
Fuel
Perform the spark test (page 7-7).
Spark
Check the cylinder compression (page 12-5).
Check the spark plug (page 3-12).
Dry
Disassemble the carburetor to clean the
carburetor ports, jets and nozzles (page 5-6).
Check for fuel tank joint or fuel tube (page 5-3).
No fuel
Perform the IGNITION SYSTEM
No spark
TROUBLESHOOTING (page 7-2).
Compression
Check the valve clearance (page 3-13) and then
is too high
perform the cylinder compression test. If the
cylinder compression is too high, remove carbon
deposits in the combustion chamber (page 3-14).
Check the decompressor operation of the
camshaft (page 13-12).
Check the valve clearance (page 3-13), and then
perform the cylinder compression test.
If the cylinder compression is too low, perform a
leak down test.
If there is no air leakage in the engine, check the
following.
Compression
- Valve spring free length (page 12-7)
is too low
- Valve seat width (page 12-6)
- Valve face irregularly worn (page 12-7)
- Decompressor operation (page 13-12)
- Piston ring side clearance (page 13-8)
- Piston ring width (page 13-9)
- Piston ring end gap (page 13-9)
- Piston skirt O.D. (page 13-7)
- Cylinder sleeve I.D. (page 13-6)
If spark plug is correct, clean and dry the
electrodes and then restart the engine, taking
Wet
care that the choke valve is not closed too much.
If the engine does not start and the electrodes are
wet again, check the carburetor float valve (page
5-8).
TROUBLESHOOTING
4-3