Fuel from top of Carb

[nielsbillcliff]

I am completely new to fixing boat engines (or any engines) so please forgive me if anything here is really obvious.<br /><br />I am running (or in this case actually NOT running) a Suzuki DT65 from about 1985. I had no joy starting up after a year or so stored, so disassembled and cleaned the carbs according to the procedures in my manual. They were pretty dirty judging by the colour the carb cleaner changed to.<br /><br />The problem is now when I push clean fuel through the filter and pump to prime it I can see fuel squirting out of a hole at the top of the carburetor. On my model the float bowl is at the bottom and the hole at the top is next to the Pilot Jet screw. I cannot see why fuel would come out of this hole in the manual. The carb is made by Mikuni.<br /><br />With fuel squirting out I dare not start the engine to see if the problem goes away. I'm hoping someone will tell me that either a) This is OK, don't worry, or b) I've put the carb back together wrongly and I can have another go.<br /><br />Any help really appreciated.<br /><br /><br />Niels

 

[jim dozier]

Re: Fuel from top of Carb

I believe that when you cleaned/rebuilt the carbs you may not have set the new float valve/float height properly. One or more of your carbs' float valves is stuck open and when the bowl fills it isn't shutting off the fuel and it is coming out the top. You need to go back and do the carb rebuild again. Also since you are going back in there, make sure you have cleaned ALL of the orifices with carb cleaner AND compressed air. You replaced the float valves with the new ones that came in the rebuild kit right?

 

[nielsbillcliff]

Re: Fuel from top of Carb

Thanks for your reply Jim.<br /><br />Just goes to prove what an amateur I am - have now ordered carb rebuild kit! I assumed you just took them apart, cleaned the bits and stuck it back together.<br /><br />Niels