Figure 31. Magneto point adjustment.
(2)
Clean around each spark plug with a
Figure 30. Timing pointer alined with DC mark on
clean cloth and compressed air. Remove
flywheel.
the spark plugs with a deep ell socke
-w
t
wrench or a spark plug wrench.
(3) Loosen the point mounting screw and
(3)
Clean the plugs with a spark plug sand
adjust the points to 0.008nch to 0.012
-i
blaster. Set the plug gap at 0.025 inch.
inch clearance as shown in figure 31.
(4)
Inspect the spark plugs for cracked or
Tighten the point mounting screw.
eroded porcelain, burned electrodes,
damaged threads, or other defects. Test
(4) Position the cover (14, fig. 20) on the
the spark plugs on a spark plug tester.
magneto; secure with the four. cover
Replace defective spark plugs.
mounting screws (13) and lockwashers.
(5)
Install spark plugs in the cylinder head.
(6)
Connect ignition leads.
(5) Time the magneto as directed in c(6) and
(7) above.
b Shielded
Ignition
Lead
Replacement.
71. Spark Plugs and Ignition leads
Disconnect the ignition leads (2, fig. 20), from the spark
a. Spark Plug Service and Replacement.
plug and magneto, one at a time. Install replacement
leads as old leads are removed.
(1) Loosen the nuts that secure the shielded
ignition leads to the spark plugs;
disconnect the leads.
Section VII. COOLANTSYSTEM.
72. Description and Function
the hose off the part to which it is attached. Discon t
nec
The coolant system prevents the temperature in the
pipes with a pipe wrench.
engine combustion chamber, which may reach as high
c Slide replacement hoses over the part to which
as 4,000 F., from damaging the engine. Mainning
tai
they connect; secure by tightening the hose clamps.
coolant system efficiency is important. Engine
Apply pipe joint sealer to the threads of metal water
temperatures must be brought up to and maintained
lines before installation.
within a satisfactory range for efficient operation;
overheating must be avoided.
d Refill the coolant system with coolant.
73. Coolant Line and Hose Replacement
74. W ater Pump.
a.. .Drain the coolant to a level below the line or
a Removal
hose to be replaced.
(1)
Drain the coolant system to a level
b Coolant piping is shown in figure 32. Remove
below the water pump (4, fig. 25).
the hoses by loosening the hose clamps and sliding 40
TAGO 6358-A
40