Johnson 1999 25 hp starving for fuel

[wayneowar]

Hi... I have a 1999 Johnson 25 hp Modle# J25ELEED. It started this season and ran for a good for 10 min in bucket of water and then shut down. I determined it was starving for fuel when it would start when spraying in WD40 in carb. it would start run for a moment than shut down. I just rebuilt the fuel pump, checked fuel tank and replaced with fresh fuel, new hose and squezze ball. I have fuel pressure in squezze ball and fuel to pump. The engine strart runs for for a few seconds and quits. I opened fuel bowl nut and get a small amount of fuel coming out.. Before I remove the carb from engine does anyone have an idea for me... Thanks Wayne

 

[SparkieBoat]

Re: Johnson 1999 25 hp starving for fuel

remove the carb and clean/rebuild it.

 

[wayneowar]

Re: Johnson 1999 25 hp starving for fuel

Ok I took the carb. off and found some rubber gasket in the needle and seat. I put it all back together and the engine is running... Thanks.

New issue: The engine is running but at idle it has a miss... It sounds as if your trying to shift it when it misses. It will miss a few times then it will die... I have a feeling I have to remove the carb again. I have new coils and plugs on the engine and have checked the spark and it is good so What do you think... Thanks Wayne

 

[DJ]

Re: Johnson 1999 25 hp starving for fuel

Float level set too low. What you are experiencing, per your description, is a; "lean sneeze".

 

[wayneowar]

Re: Johnson 1999 25 hp starving for fuel

Thanks DJ... Do you know how to change the float level and where do you set it at... Thanks Wayne

 

[SparkieBoat]

Re: Johnson 1999 25 hp starving for fuel

you generally just bend the tab that hits your needle valve, I usually set mine so the float rest even with the carb upside down. Are you sure you have good clean fuel, a small amount of water in your fuel or old fuel can also cause your [problem.

 

[wayneowar]

Re: Johnson 1999 25 hp starving for fuel

Thank You for your help Sparkieboat... I have new fuel I had that happen to me a long time ago so I learned from that mistake..lol. Before I pulled the starter off again to get to carb. I played with the idle screw and it seems to be better. I will bay test and see what happens. If no luck I will do what you said.. Thanks again Wayne

 

[SparkieBoat]

Re: Johnson 1999 25 hp starving for fuel

could be a clog in your idle passage..try running a concentrated mix of 1 gallon premixed fuel and 1 can Sea foam, this will help clean carbs and also help decarb pistons,..warning expect lots of smoke..