Ether is a highly volatile fluid
that is injected into the intake manifold, as you crank the engine. It is found in an
aerosol or capsule type container. Since ether has a low ignition point, the heat
generated in the combustion chamber is able to ignite it. Heat from this ignition then
ignites the diesel fuel and normal combustion takes place. Once the diesel engine starts,
no more fluid is required.
starting aids, such as ether, should be used only in extreme emergencies. Too much ether
may detonate in the cylinder too far before top dead center (BDTC) on the compression
stroke. This could cause serious damage, such as broken rings, ring lands, pistons, or
even cracked cylinder heads. If you must use ether, the engine has to be turning over
before you spray it into the intake manifold.