Battery Ignition

 

Set the contact breaker gap to 0.20”.

 

Turn the flywheel until the Number 1 piston is on its firing stroke (inlet and exhaust valves closed) and the mark B.L.I. (Battery Late Ignition) on the flywheel is aligned with the timing pointer on the clutch case. This is approx 1 ½” measured on the flywheel or 10 degrees ‘after’ top dead centre (TDC).

 

Fully retard the ignition lever (late) on the quadrant, the contact breaker cam should be at the point of opening the contacts and opposite the Number 1 segment of the distributor. Use of a continuity test meter will precisely determine the moment of points opening.

 

Magneto Ignition

 

Set the contact breaker gap to 0.015”.

 

Turn the flywheel until the Number 1 piston is on its firing stroke (inlet and exhaust valves closed) and the mark M.L.I. (Magneto Late Ignition) on the flywheel is aligned with the timing pointer on the clutch case. This should be approx ½” measured on the flywheel or 3 degrees ‘before’ top dead centre (TDC).

 

Fully retard the ignition lever (late) on the quadrant, the contact points should be at the point of opening the contacts and opposite the Number 1 segment of the magneto. Use of a tweeter will precisely determine the moment of points opening.

 

  

Firing Order

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1 – 4 – 2 – 6 – 3 - 5

 

Flywheel Markings

 

TDC   Top dead centre

BDC   Bottom dead centre

IO       Inlet (valve) opens

IC       Inlet (valve) closes

EO     Exhaust (valve) opens

EC     Exhaust (valve) closes

 

BLI    Battery late ignition

MLI   Magneto late ignition

BAI   Battery advanced ignition

MAI   Magneto advanced ignition