At some good suggestions here, I have bought a can of DeCarbonizer or OMC Engine Tuner before tearing down my 40 HP with no compression. I cannot figure out where the Primer Lever Valve cap is located to screw the hose on to inject the "engine tuner". This is a last ditch effort before tearing it down. Can someone tell me where the connector or Primer Lever Valve cap is? The service manual does not mention it. <br />Thanks.