Possible Carb Problem?

[pastorrob1169]

I recently had problems with my 50hp Mercury bogging down at full throttle because of the primer bulb sucking flat. After a lot of trial and error I found that it was the fitting that screws into my 6 gallon tank that was clogged. I replaced the fitting and things run better except now the motor has surges at full throttle and at an idle it puts gas in the water I am assuming through the exaust. It uses a lot of gas now. Could this be a float stuck that was not flooding when I had the fuel restriction problem or could this be some sort of bulb problem with the check valve? I have seen where people say the bulb must be pointing up. Any ideas would be great!

 

[Barnacle_Bill]

Re: Possible Carb Problem?

I would put a fuel pump kit in it. The diaphram may have been damaged due to the blocked line.

 

[pastorrob1169]

Re: Possible Carb Problem?

Thanks! I will try that first. If the diaphram was damaged it would just let gas free flow through?

 

[j_martin]

Re: Possible Carb Problem?

Thanks! I will try that first. If the diaphram was damaged it would just let gas free flow through?

It's a pulse pump driven by crankcase pressure and vacuum. If the diaphragm leaks, it will suck a lot of fuel through the pulse port or line directly into the crankcase of one cylinder.

Squeeze the primer bulb with a friendly firm handshake grip, and if fuel flows out carb throats, it's a needle valve. If the bulb slowly collapses and the fuel disappears, repair the fuel pump.

Hope it helps
John

 

[deltacottonboy12]

Re: Possible Carb Problem?

sounds to me like you havent fixed your gas line woes. your still getting air into the system some where.

 

[pastorrob1169]

Re: Possible Carb Problem?

Took the fuel pump off yesterday and took it to be rebuilt. ( I am not to handy). I also replaced everything from the tank to the carbs including hose, bulb, fuel pump, fuel filter and the plugs. We took the boat out and it ran better than it has since we bought the boat. The guy showed me where pieces of the liner from the gray fuel line had lodged in the fuel filter. Thats why I replaced the lives and bulb. After I removed the gray fuel line which was only a year old, you could see where the lining was decaying from the alcohol. So now I will just wait for the next thing to happen. The joys of ownning a boat. Of course $145 for a repair and bottle of fuel stabilizer is pretty cheap especially in the keys! Thanks to all you guys!

Pastor Robby