13
MAINTENANCE
FUEL FILTER
If the fuel filter warning light comes on while engine is
running, stop engine and drain water from fuel filter.
To drain water:
[1]. Stop engine.
[2]. Place a drain pan under fuel filter and loosen drain
plug approximately 1 turn.
[3]. Water should drain. If necessary, operate priming
pump to drain water, but only until fuel flows from filter.
[4]. Tighten drain plug.
[5]. Start engine. Ensure warning light goes out. Check for
leaks.
To replace fuel filter:
[1]. Disconnect sensor wire. Remove drain plug and
discard O-ring.
[2]. Remove fuel filter with filter wrench.
[3]. Screw new filter on by hand until gasket contacts
housing. Then tighten 1/3 turn more.
[4]. Install drain plug with new O-Ring. Connect sensor
wire.
[5]. Activate primer pump until resistance is felt.
[6]. Start engine and check for leaks.
Drain/replace fuel filter
PRIMING
PUMP
FUEL
FILTER
DRAIN
PLUG
SENSOR
WIRE
O-RING
WARNING
• Disconnect battery at
negative terminal.
VALVE CLEARANCE
With No. 1 piston at TDC of compression stroke, check valve
clearances for cylinders shown in chart below. Rotate crank-
shaft 360° clockwise to check remaining valves. Adjust in
same order, if required.
Note: If engine is running normally, this check and adjustment
may be omitted.
[1]. Loosen adjusting lock nut.
[2]. Using a wrench to hold adjusting lock nut, adjust with
screwdriver. Determine clearance using a feeler gauge.
[3]. While holding screw driver in place, torque adjusting
lock nut.
Valve clearances (cold):
Int 0.2 mm (0.008 in.)
Exh 0.2 mm (0.008 in.)
Adjusting lock nut torque: 110 kg-cm (95 in. lbs.)
Check valve cover gasket for leakage. Replace if required.
Torque valve cover nuts to 55 kg-cm (48 in. lbs.)
Piston Position Cylinder
1 2 3
No. 1 piston at TDC, of compres-
Int
D D
No. 1 piston at TDC, of compres
sion stroke
Exh
D D
°
Int
D
o
a
e
ran
s
a
c
oc
w
se
Exh
D
Valve clearance adjustment
WRENCH
SCREW
DRIVER
FEELER
GAUGE
