What is the problem with my 40HP Mercury?

[Johnfromfla]

I have a 2004 40HP ELPTO Mercury. This is a new motor that I got with no warranty. I installed it on my Skiff in December. <br /><br />THESE are my problems:<br /><br />1.The motor does not want to want to idle. <br /><br />2.When I give it gas there is a long hesitation before she will go.<br /><br />3.The maximum RPM's are 4000. I do have a tach to confirm this.<br /><br />4.Although the max RPM igoes to 4000 I still have more throttle. I go to give it more throttle and it almost stalls.<br /><br />5. I have to feather the throttle back and forth to get the RPM's back up otherwise it will stall.<br /><br />My attempts to fix the problem are:<br /><br />1.So far I took the carbs apart and everything was clean as could be.<br /><br />2. I replaced the spark plugs as I thought they were fouled.<br /><br />3. I replaced the end of my fuel line thinking a check ball was stuck.<br /><br />4. I have tried a new tank of gas.<br /><br />All attempts to fix the problem have failed. I do have JOHNSON hose (MALE & FEMALE) ends on my gas tank. Do you think that this could be the problem? Any advice would be appreciated.

 

[Laddies]

Re: What is the problem with my 40HP Mercury?

Mercury Marine warrenties all of their engines, I thought, where did you come by yours? I would start by calling customer service in Fond du Lac. The hose connection should not cause the problem, it sound like you still have a fuel problem---Bob