Starting Failure/Hard Starting; Fuel System; Electrical System - Yamaha TDM850 1996 Service Manual

NOTE:
The following troubleshooting does not cover all the possible causes of trouble. If should be helpful, howev-
er, as a guide to troubleshooting. Refer to the relative procedure in this manual for inspection, adjustment
and replacement of parts.

STARTING FAILURE/HARD STARTING

FUEL SYSTEM

Fuel tank
S Empty
S Clogged fuel strainer
S Clogged fuel tank drain hose
S Deteriorated fuel or fuel containing water or for-
eign material
Fuel cock
S Clogged fuel hose/vacuum hose

ELECTRICAL SYSTEM

Spark plug
S Improper plug gap
S Worn electrodes
S Wire between terminals broken
S Improper heat range
S Faulty spark plug cap
Ignition coil
S Broken or shorted primary/secondary
S Faulty spark plug lead
S Broken body
Full-transistor system
S Faulty ignitor unit
S Faulty pickup coil
STARTING FAILURE/HARD STARTING
TROUBLESHOOTING
Carburetor
S Deteriorated fuel, fuel containing water or foreign
material
S Clogged pilot jet
S Clogged pilot air passage
S Sucked-in air
S Deformed float
S Groove-worn needle valve
S Improperly sealed valve seat
S Improperly adjusted fuel level
S Improperly set pilot jet
S Clogged starter jet
S Starter plunger malfunction
S Improperly adjusted starter cable
Air cleaner
S Clogged air filter
Fuel pump
S Faulty fuel pump
Switches and wiring
S Faulty main switch
S Faulty engine stop switch
S Broken or shorted wiring
S Faulty neutral switch
S Faulty start switch
S Faulty sidestand switch
S Faulty clutch switch
Starter motor
S Faulty starter motor
S Faulty starter relay
S Faulty circuit cut-off relay
S Faulty starter clutch
9-1
TRBL
SHTG