carb leaking fuel.....

[bw6653]

My 68 murcury 500 50hp is leaking fuel from the carbs. I would like to know is this a carb problem or a fuel pump problem or is there another problem that i don't know about. Just a little extra info the motor runs fine on land but when i put it in the water it runs for a short time and stalls out. I also noticed a hissing sound when i pump the bulb to prime the fuel is this normal... thank you for any help.<br />

 

[Hooty]

Re: carb leaking fuel.....

Tell ya what it zounds like bw6653, it sounds like neddle and seats leaking by. Get yourself a shop manual and overhaul those puppies.<br /><br />c/6<br /><br />Hooty

 

[RICKRICK1]

Re: carb leaking fuel.....

HOOTY is right, time to rebuild those carbs.

 

[wheelwright]

Re: carb leaking fuel.....

If you find out please let me know, i've been battling this problem too. I am starting to think fuel pump, i've changed needles seats, float level, added two inline fuel filters , still leaking out the front. everyone says needle and seats, needle and seats, needle and seats, ugh , i've visited these so many time i can litterely do it with my eyes closed. i'm starting to think too much pressure from the pump.

 

[Hooty]

Re: carb leaking fuel.....

You didn't tell us what engine you have John, but if the fuel isn't coming from the carb, it's blowing back out through the reeds.<br /><br />c/6<br /><br />Hooty

 

[Cricket Too]

Re: carb leaking fuel.....

The hissing sound is normal when you pump the priming ball, it is the sound of gas filling up the carb bowl or bowls.