1976 25 hp Evinrude rebuild - Air in fuel system

1976 25 hp Evinrude rebuild
- Air in fuel system - Gas line connector motor side - Oring dry and broken
Rebuild is almost done. Motor was found in pieces and almost scrap bought it as a project. Cleaned the good stuff up bought several pieces needing replacement. Went through the motor top to bottom. 2nd start after sitting a year started right up. We do have a prime issue not related to motor. Gas line - oring in the connector is cracked letting bits of air in the system causing the cough. Squeeze the primer bulb and she running perfect. Next video will be testing on lake at full speed. This is a great video to see what air in the gas system sounds like. Many things can happen to cause a air leak in gas system.

[@caseys1182]

Yes that is correct. On this engine the lean sneeze is happening due to a damaged oring in the fuel line connector and air was getting in at the connection and gas was leaking out. Causing a lean condition.

[@keithlaub7964]

Air fuel mixture is to lean

[@peterjensen6844]

Yeah this is a "lean sneeze". But what's described with air getting in to the line could cause this because air getting in would be nature make it too lean.