Fuel dripping from bottom of carb on Yamaha kicker

[DollarBoat]

I have a '98 Yahama 9.9 and for some reason there is fuel dripping out the bottom of the carb when it rests at ideal and then for a bit after the motor is off. When it's in gear and higher throttle, it doesn't leak. It seems to be coming from under the bowl, where there is a pan that has a diaphragm in it. Diaphragm does have a bit of gunk on it but seems ok. Not sure if this is causing the leak. I did rebuild the carb, cleaning the jets and adding new gaskets but didn't stop the leak.

Any suggestions?

 

[rockdog]

Checked the float level (height)?

 

[papalorge]

are the hoses in good shape. I had a leak that was tricky because the fuel would run down the power head and leak into the water

 

[Hourstonglassic]

Probably the accelerator pump diaphragm

 

[Dencope]

Could be gasket between bowl and carb. Start simple and go from there. Let us know how you make out.

 

[DollarBoat]

I am thinking it is the accelerator diaphragm. I replaced all the gaskets when I rebuilt the carb and can pinpoint the leak to the pan that holds the diaphragm. I am going to pick up a new diaphragm tomorrow ($54!) and see if that fixes the problem. Finger crossed.

 

[chinnok]

Sometimes it's easier and cheaper just to buy a new carb then rebuilding those things. I spent a couple hundred rebuilding mine, didn't work and had to go buy a new one. Another $300 later, bolt in on and way to go.

 

[DollarBoat]

So I replaced the diaphragm in the carb and problem solved. No more leaking fuel and now the engine runs like brand new.