Honda TRX70 Fourtrax 1986 User Manual

16. TROUBLESHOOTING
ENGINE DOES NOT START OR IS
HARD TO START
POOR PERFORMANCE AT HIGH SPEEDS 16-4
ENGINE LACKS POWER
POOR PERFORMANCE AT LOW
AND IDLE SPEEOS
16-1
16-2
16 -3
POOR HANDLING
ENGINE DOES NOT START OR IS HARD TO START
, . Check if fuel is getting to NO FUEL TO
• 111
carburetor CARBURETOR
,2)
'3)
GETTI NG TO CA RBURETOR ,4)
j
2. Try spark test WEAK OR NO SPARK
• (1)
'2)
GOOD SPA RK ,3)
,4)
'5)
'6)
'7)
,8)
,.)
3. T est cylinder comp r essio n LOW CO MPRESSION
• (1)
'2)
COMPRESSION NORMAL
,3)
I
, 4)
'5)
'6)
4.
Start by following normal ENGINE STARTS BUT
• (1)
starting pr ocedu re SOON STOPS
'2)
'3)
ENGINE DOES NOT START
I
,4)
'5)
5. Remove spark plug WET PLUG
• (1)
, 2)
D RY
,3)
!
,4)
,5)
6. Start with choke applied
16-4
ProbabM Cau ..
No fuel in fuel tank
Clogged fuel line or fuel strainer
Clogged float valve
Clogged fuel tank cap breather
hole
Faulty spark plug
Loose spark plug cap or wiring
Faulty ignition switch (After ' 86)
or engine stop switch if plug
sparks when blac k/ white wire is
disconnected
Faulty exciter coil
Faulty pulse generator
Faulty ignition c oil
Faulty COl
Pulse generator air gap
Loose terminals, connectors.
faulty wiring
Valve clearance too small
Valve stuck open
Worn cylinder and piston rings
Damaged
cy linder head gasket
Seized valve
Improper v el ve timing
Choke stuck closed
I mp roperl y adjusted pilot screw
Air leaking past carb uret or ins ula·
to,
Improper ignitio n timing (COl unit
or pulse generator faulty)
Fuel/air mixture too lean
Carburetor flooded
Choke stuck open
Fuel/
air mixture too rich
Air cleaner dirty
Improperly adjusted pilot screw
16-1

Honda TRX70 Fourtrax 1986 Specifications

General

Brand	Honda
Model	TRX70 Fourtrax 1986
Category	Offroad Vehicle
Language	English