Adjusting the points opening: When initially installing or when
reinstalling the armature plate1 the contact breaker points opening is the first
thing to be checked. To check, use a clean, greaseless feeler gauge of the
correct thickness.
If the opening must be readjusted, loosen the lock screw of
the contact carrier and displace it using a screwdriver set in the adjusting
slot and braced on the projecting nose. Retighten the lock screw.
The points opening can change upon tightening the lock screw, Therefore, it
must again be checked after tightening.
Measuring the breaker points opening (on KB 1 & RBl). In measuring, use a
clean, greaseless feeler gauge of the corresponding thickness.
If the breaker points opening must be adjusted loosen the contact carrier
lock screw and displace the carrier with a screwdriver set in the adjusting slot
and braced against the small projecting nose. (Use adjustment cam!)
Re: 2. Ignition timing adjustment: Bring the piston or engine
crankshaft to the BTDC position as specified by the engine manufacturer. Then
turn the armature plate after loosening the mounting screws until the position
is reached where the contact breaker points just begin to open (use adjustment
cam if available).
This instant when the points begin to open can be determined by sliding a
clean, greaseless 0.001 in. (0.03 mm) feeler gauge between the points. At the
instant of opening, it should be able to be withdrawn easily. Do NOT USE PAPER!
When the armature plate is in the correct position, tighten the mounting
screws in the slot.
Now check the break-away gap, i.e., the distance between the flywheel pole
shoe edge and the ignition armature pole shoe edge. This gap, which is obtained
by turning the flywheel in the direction of rotation, must be within specified
tolerances at the instant the points open.
If the break-away gap is not correct although the points opening is correctly
adjusted, either the armature plate is not precisely centered or the crankshaft
is off-center to the armature plate; the crankshaft may also be knocking.
A BREAK-AWAY GAP THAT IS TOO LARGE
EFFECTS WEAK STARTING IGNITION; ONE THAT IS TO SMALL CAUSES MISFIRING AT HIGH
SPEEDS.
ALSO TO BE NOTED IS THAT THE IGNITION TIMING POINT MUST NEVER BE ADJUSTED BY
CHANGING THE
SPECIFIED BREAKER POINTS OPENING. THIS WILL ALSO CHANGE THE BREAK-AWAY GAP
AND THE SPARK-
PRODUCING POWER OF THE MAGNETO WILL DROP.
|
