I have a 1990 120 with VRO. Engine runs like a champ. Strong, smooth, wonderful engine. <br /><br />Except after it's been sitting for as little as a week or two. Then it's VERY difficult to start (dense clouds of smoke) without advancing throttle until engine has warmed up or run through whatever is left in the carb bowls. That takes about 10 minutes. Then engine will idle OK, exhaust doesn't smoke and I'm ready to go fishing. <br /><br />It acts like gas/oil has separated in carb bowls, and once fresh gas has reached carbs, engine settles down and idles fine and doesn't smoke, but getting it started is always a chore. <br /><br />I have single lever control--no warm up lever, so I have to take the motor cover off and hold throttle open with my foot while turning key and intermittently pushing in on key switch to activate choke. <br /><br />I rebuilt carbs, put new kits in, everything's clean, and fuel's fresh. 125 psi compression in all 4 cylinders. Only problem is starting first time after engine's been sitting for as little as a week. <br /><br />One observation: There is a plastic filter in the fuel line beneath the fuel pump on the left side of the engine. After engine's been sitting a short while, the plastic develops a greenish tint, indicating that oil has migrated into the gas line. Wonder if oil from the VRO pump is draining into the fuel line, and what I'm seeing is an oil-rich mixture until engine has burned through what's in the carb bowls and fuel line. When the engine settles down and idles the fuel filter is clear, not green. <br /><br />I haven't seen this problem discussed. Any thoughts?
