22
Your engine is equipped with the PVL (brand) ignition system.
The AC charging circuit is on the 2 yellow wires and come out in their own separate wiring
harness. Must use the PVL regulator rectifier (supplied w/electric start option). Voltage
rectifier must be mounted on a flat, grounded surface so that it can dissipate heat. Do not
mount rectifier to the engine plate. It is heated by the engine which will cause the rectifier to
fail.
PVL ignition lighting coil output is 250 watts (20 Amps) Rectifiers not rated for at least 20
amps will most likely fail. Some types of gel cell batteries will fail when used with a 20 amp
charging system. Recommend a dry cell or lead acid battery rated for 200 + cranking amps.
There is a 4 pole plug in the front of the engine. The other half of this plug is supplied in a
plastic bag in your accessories box. Wiring code is as follows.
Blue- #l Ignition stop circuit. (open to run/shorted to ground to stop engine)
Blue-#2 Ignition stop circuit. (open to run/shorted to ground to stop engine)
Two Green wires
–
RPM pulse for Fuel injection, do not use for tachometer. Shorted together
with green jumper on fuel injected engines. Both left unused on carbureted engines.
PVL uses Westberg part (#2CT8A-2/6 tachometer for
2” rou
nd), (#2AT8A-
2/6 for 2 ¼”
square) (3AT8A-2/6 for
3” tach), (6 pulses per rev.)
The yellow jumper on the back of
Westberg tachs must be cut. Connect pulse wire from tach to one of the yellows wire from
charging coil that is also attached to one of the yellow wires on rectifier. The green with red
stripe wire on rectifier is not used. Set tach pulse set point for Grand Rapids Technologies
EIS to 6.
Ignition stop wires must be connected to separate switches or a left/right both key switch.
Connecting both stop circuits to a single pole switch will damage the ignition system.
Hirth PVL ignition has a Rev limiter built in. Engine will not turn faster than 7000 RPM.
This can save expensive engine repairs in the case of sheared prop bolts at full power.
Ignition operates at 40 thousand volts. Voltage this high reduces plug fouling, increases
performance, allows easier starting and reduces radio noise. NOTE: Must use resister spark
plugs combined with resister plug caps.
Any type of loose wiring connections within the ignition system can cause electronic noise that
is destructive to the internal CDI components. Occasionally check that all spade wiring
connections on bottom of ignition coils, and both stop switch connections in instrument panel
are secure. Also check spark plug wires where they plug into ignition coils and at the caps. Do
not operate engine unless all ignition wiring is secure. Perform a mag check of both ignition
systems before each use. If mag check reveals that one ignition system is not functioning do
not operate engine until repaired. There is very little RPM drop when running on 1 ignition.
Perform another mag check just before shutting engine off to insure both systems are still
functioning. It is possible to have 1 side go out while operating and not notice any difference
in performance.
Summary of Contents for F-23
Page 17: ...17 Note 1 inch 25 4 millimeters ...
Page 23: ...23 ...
