MAGNETO ’ -
Two different magnetosare in use on these engines- the standard type is shown on page 5.1 and
the optional radio shielded type is shown below. Both are flange mounted on the front support plate and
.
driven off an idler gear which is,
in turn, driven off the crankshaft gear. The breaker points, coil and
condenser are located inside the unit.
A built-in impulse coupling imparts a strong spark for starting
when rotational speeds are low.
Avoid removing magneto from the engine since it must be retimed to
the engine when reinstalled-
this should be done only by a qualified mechanic.
Magneto Service:
After each 500 hours of operation,
remove magneto end cap and check condition of
breaker points-- if dirty, clean with lacquer thinner and a coarse (lint free) cloth.
.
If slight amount of
pitting and metal transfer is noted, dress contacts with tungsten file or a fine stone. Replace points if
badly worn or pitted. Reset gap as follows after servicing or replacing points:
1.
Turn engine over until points are wide open (at highest point on cam). Maximum opening should
be .OlP.
Proceed with Step 2 if adjustment is necessary.
2.
Loosen clamp screws slightly so that contact plate can be moved
--insert blade in adjusting slot
then shift plate until .
019 maximum clearance is measured between contacts. Retighten clamps
after adjustment.
.
3.
Lubricate cam wick with Rycon grease each time breaker points are serviced.
Wiring: When viewed from the terminal end, the standard unit rotates in a clockwise direction while
the shielded unit rotates in the opposite direction.
The number 1 terminal is marked on each end cap.
Firing order of the engine is 1
- 3 - 4 - 2. Refer to Figure 5-l for proper connection of the high ten-
sion leads from the standard type magneto to spark plugs
--refer to Figure below for connections to
shielded type magneto.
The leads must be properly connected to make the engine fire in the correct
order.
SHIELDED
MAGNETO
(TOP VIEW)
TO 85 TERMINAL
IN CONTROLLER
TO # 2
PLUG
TO # 1
PLUG
r-
SET GAP ON SHIELDED
PLUGS AT .018"
I
TO # 4
PLUG
TO iy 3
PLUG
FIGURE 5-2 --
WIRING CONNECTIONS - SHIELDED TYPE MAGNETO
.
52 a
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