Reply To: 1978 Evinrude 2hp.

[frankr]

mumbles wrote, ” No matter what anyone says, leaking crank seals do not contribute to the cylinders low pressure. That is governed by the condition of the cylinder itself and the piston and rings.”. That is true, BUT many do not realize that crankcase compression is also important in a two-stroke. Worn bearings and seals can make a non-runner, as mumbles also suggested.