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This newspaper page contains 3 articles. Subscribers can read the full text of each article.
Newspaper
Wellington Times
Location
Wellington, New South Wales, Australia
Date
May 28, 1925
Page
3
An article explains how air leaks in the induction system cause rough running and poor starting, especially at partial throttle. It describes effects on a four cylinder engine, detailing how leaks in an inlet valve guide reduce one cylinder’s power, creating irregular firing, idling, and difficulty in traffic, with implications for fuel economy and drivability.
A technical piece discusses how leaks at inlet valve guides and joints disrupt cylinder firing, causing uneven running. It covers leakage sources, detection methods such as oil-sucking tests and smoke tests, and practical sealing options like gold-size or Secptine. Prevention hinges on careful joint making and reliable seals, though leaks can still occur.
The text explains substituting petrol for oil to balance a leak air condition. A leak increases richness, boosting speed briefly until excess petrol is cut off, then speed falls back. If the leak is minor, the effect is hard to detect unless the mixture is weakened at the carburettor by smaller jets or stopping the main jet.
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