I am trying to diagnose a rough running problem with my 30HP Mariner and in the manual I've noticed the powerhead has a "bleed pipe" which runs between 2 connectors on the cylinder block (1 at the top 1 at the bottom).<br /><br />The manual says that one end of the bleed pipe has a check-valve to only allow fuel mixture to flow one-way. By sucking and blowing on a pipe attached to either of the connectors it seems to me that air can flow unchecked in either direction through both connectors on my engine.<br /><br />Does anyone know what purpose the "bleed pipe" serves? And what the consequences of the check valve being stuck are?<br /><br />Thanks very much.
