Lower airspeeds, open cowl flaps, higher power settings

Lower airspeeds, open cowl flaps, lower power settings

Higher airspeeds, closed cowl flaps, lower power settings

Higher airspeeds, open cowl flaps, lower power settings

Metering jet

Oil filter bypass valve

Oil sump

Pressure relief valve

Opens and closes twice

Opens when the exhaust valve opens

Opens when the exhaust valve closes

Opens and closes once

You may use the next higher grade of fuel on an occasional basis

You cannot refuel

You may use the next lower grade of fuel

You may use petrol

The first indication of carby icing is a fall in oil temperature

Carby ice will always form when the temperature is below freezing

The carby heart is a de-icing device that heats the air after it leaves the carburettor

Carby ice is most likely to form when the air temperature is in the range -10oC to +20oC with visible moisture or high humidity

Intake, power, exhaust, compression

Intake, exhaust, power, compression

Intake, power, compression, exhaust

Intake, compression, power, exhaust

The same

Too rich

Correct

Too lean

Faulty magneto timing

A cracked intake manifold

Burned out magneto breaker points

A broken magneto ground wire

Midway through the power stroke

Just prior to top dead centre at the end of the compression stroke

During the exhaust stroke..