Engine Troubles; Cylinder Compression Check - Honda BF2D Series Manual

b. ENGINE
• Hard Starting
H:OND.A
BFeD
L-'_.
_F_ir_st_c_h_e_c_k_th_e_f_u_e_1 ,le_v_e_1 i_n_t_h_e_ta_n_k_. _ _
----'~
No fuel
--...j
Add fuel and restart the engine.
I
Sufficient fuel
2. Loosen the drain screw and check whether
fuel reached the carburetor.
Fuel reached the
carburetor.
,
Fuel not
reached.
1
3. Remove the spark plug and inspect for wet
11---.----
or fouled electrode.
I
Dry
Check for blockage of the fuel tubes and/or
strainers.
Check for blockage iA the carburetor port and
nozzle.
,--_ _ _ _ _ _ _ _ _ -'--_ Wet --"". Clean the electrode and restart, taking care
I
4. Perform spark test (P. 2-14).
I
Good spark
5. Check the cylinder compression (see
below).
No spark or
weak spark
High cylinder
compression
that the choke is not closed too much.
• If flooding is severe, check the carburetor
float valve.
See IGNITION SYSTEM TROUBLESHOOTING
(P.2-14).
Check to see whether excessive carbon has
accumulated in the combustion chamber.
Normal compression
Low cylin.der ... • Check that the valve clearance is correct.
compression • Check for worn piston rings, piston or cylin-
Install the spark plug and restart the engine.
• CYLINDER COMPRESSION CHECK
') Remove the engine cover (P. 4-1).
2)
Remove the spark plug and install a compression gauge
in the spark plug hole.
3) Pull the recoil starter several times with force and mea-
sure the cylinder compression.
Cylinder
compression
0.88 MPa (9.0 kgf/cm2, 128 psi) at
1,000 rpm
der.
COMPRESSION GAUGE
--+--~
(commercially available)
2-10
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