Honda 85RB EXPERT 2006, Owner'S Manual

Page: 107 / 134

Tips
103
Tips
103
Troubleshooting
The items that are serviceable using this Manual are
followed by the page number reference in parenthesis. The
items that require use of the Honda Service Manual are
followed by an asterisk.
CHECK
1. Check ignition
timing *
2. Check carburetor
air screw
adjustment (P. 91)
3. Check if air
cleaner is
overoiled (P.40)
4. Check if the
insulator is
leaking*
5. Try spark test
POSSIBLE CAUSES
• Faulty ignition control
module *
• Faulty alternator *
• Faulty ignition pulse
generator
• Fuel-air mixture too
lean (Turn the air
screw in) (P. 91)
• Fuel-air mixture too
rich (Turn the air
screw out) (P. 91)
• Over-oiled air clean-
er.
• Deteriorated reed
valve gasket
• Loose caburetor*
• Faulty, carbon or wet
fouled spark plug (P. 94)
• Faulty ignition control
module *
• Faulty alternator *
• Faulty ignition coil *
• Broken or shorted
spark plug wire
Poor performance at low and idle speeds
CORRECT
CORRECT
CORRECT
NOT LEAKING
GOOD SPARK
INCORRECT
INCORRECT
INCORRECT
LEAKING
WEAK OR
INTERMITTENT
SPARK
CHECK
1. Check ignition
timing
*
2. Disconnect fuel
line at carburetor
and check for
clogging (P. 35)
3. Remove air
cleaner (P. 40)
4. Check carburetor
jets for clogging
5. Install a larger
carburetor main
jet (P. 89)
POSSIBLE CAUSES
• Faulty alternator
*
• Faulty ignition control
module
*
• Faulty ignition pulse
generator
*
• Lack of fuel in tank (P. 35)
• Clogged fuel line (P. 35)
• Clogged fuel fill cap
breather tube (P. 35)
• Clogged fuel valve (P. 35)
• Clogged fuel filter (P. 35)
• Not cleaned
frequently enough
(P. 40)
• Contaminants in the
fuel
• Jet size wrong, reject
in the opposite
direction (P. 89)
Poor performance at high speed
CORRECT
UNRESTRICTED
FUEL FLOW
AIR FILTER
NOT DIRTY
NOT CLOGGED
INCORRECT
FUEL FLOW
RESTRICTED
DIRTY
CLOGGED
CONDITION
WORSE
CR85R/099-104 05.6.8 2:28 PM ページ 103