Thanks for reply. IN the process of checking fuel pump. Confused about thermostat. How can fuel get thru it? Yes, primer bulb goes hard. No, fuel tank is taken out when not running. We are in a remote area of Northern Territory Australia and are fishing most days. We usually troll for about 6-7 hours each day. Have completely drained oil and refilled to correct level, after day of trolling, come back, let motor cool down, check oil again, and level is about quarter of inch above correct level and if we go 2 days without draining oil, the level is half inch above line. First noticed problem when oil came back thru tappet cover breather and spilled out into intake manifold after 4 fishing trips. Never had problem before, and at camp there are alot of people with 20hp Hondas and no one has had this problem.
all comments most appreciated. All assistance helps. Cheers, Ross