This blog, in addition to the usual maintenance details for classic mini cars, an attempt is made to explain the "whys" and "wherefores" of the various jobs.

Thursday, 15 October 2009

Difficult Starting

When difficult starting is experienced it should not be assumed that the carburettor is necessarily to blame. Ignition faults are one of the most likely causes of this trouble and the ignition system should be system .tically checked-over as described in Chapter 7. Similarly, the cone don of the piston rings and of the engine generally can considerably influence the ease of starting in very cold weather, although such faults may be of relatively little importance during the summer months. One of the most common faults, of course, is a weak battery or an inefficient starter motor, which fails to rotate the engine at a sufficiently high cranking speed. In addition the battery, when subjected to the heavy current drain of the starter, may produce insufficient voltage to provide a good spark.

As far as the carburettor is concerned, therefore, attention should be limited to checking the adjustment of the starting carburettor control and making sure that the jet piston is not sticking.