| Diagram | Fig. 6 — TIMING COVER AND CONTACT BREAKER · ref 27 |
| Subsystem | engine bottom |
| Listed in parts books | 1969–1970, 1973 |
Auto advance unit (Lucas 54419867)
Lucas 54419867 auto advance unit for the timing chest, working with the contact breaker points to adjust ignition timing.
This is the auto advance unit listed in the catalog as Lucas 54419867, part number 99-1015. It shows up in the timing cover and contact breaker figure as well as the crankcase, timing gears, and oil filters figure, which places it down in the timing chest area of the motor working alongside the contact breaker points.
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An auto advance unit is the mechanical piece that moves the ignition timing as engine speed changes, so the points open and close at the right moment whether the engine is idling or running hard. It mounts on the end of the camshaft or magneto/distributor shaft under the timing cover, working in concert with the points and the cam that operates them.
Our catalog record ties this part to appearances across 1969 to 1973 but doesn't spell out which specific model or engine size it belongs to beyond that. Bring in your parts book or give us a call and we'll confirm fitment before you order.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
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