50 hp merc lacking fuel

[mcgl403]

My 1981 50 hp merc runs but starts starving for fuel. I have replaced all the fuel lines and rebuilt both carbs but it runs out of fuel. If I prime it when it starts to die it will stay running until the primer bulb geos soft and then it will die out. Any suggestions???? Thanks for your time.

[Seaducer]

1st check the oil. I had a lawnmower that did the same thing. (I know it's a bad comparison...but) I just added oil and she ran like new. You may have to change your oil though. Older engines were built to last as long as you simply keep it up. If this doesn't work, new Mercs are Just as good...

[THEFERMANATOR]

Check your fuel pump. Also I understand there is a passage through one of the carbs that runs the fuel pump, and if you put one of the carb gaskets on wrong the fuel pump won't work.

[phatdaddy]

this is probaly not your problem/solution, if running off a gas can, make sure the cap vent is open...
check the primer ball also,

[macojoe]

sounds like new fuel pump to me!!

[randlemanboater]

Could be a restriction in the tank/fuel line as well.....does the bulb get sucked flat?

[mcgl403]

No the bulb deosnt get sucked in it only gets soft then dies. All the fuel lines are new. The boat sat for 4 years before I purchased it.

[randlemanboater]

It's probably one of the things that Ferm said, but I had a fuel problem one time and it was the spring loaded ball bearing type anti siphon valve on the top of the gas tank.

[Seaducer]

It seems like there have been many reasons for lack of fuel. Another popular problem is the actual lack of fuel. This goes out to everyone. Make sure you put fuel in your gas tank. just sharing. lol

[mcgl403]

I have tried using both of my tanks with new gas oil mix 50:1

[mcgl403]

Found the problem. Oddly enough if the gaskets inbetween the carbs and the engine block are put in upside down it won't run well. OOPS my fault. There is a small hole in the gasket that needs to be on the bottom to help the fuel flow. Good luck to all and happy boating