johnson 9.9

[Usmctanker]

I need some help here. my motor would only start with starter fluid, so I cleaned out the carb and rebuilt the fuel pump it starts now but i'm having hell trying to keep it running. I know its kinda vague but any ideas are apreciated.

 

[Loggerhead Mike]

what color does the plug look like after it runs?

you need to figure out if its running rich or lean. cover the carb inlet with your hand w/ the motor running to rich'n the mixture and see if it makes it run better or worse

make sure both plugs are firing w/ a nice blue spark

after that i would go back into the carb. make sure you didnt miss a jet and your float is adj. correctly

 

[Whoopbass]

What year is your motor?
Those fuel pumps can be difficult to get back together right. Are you sure you rebuilt it right?
Turn the low speed screw out 1 1/2 turns and then fine tune it from there until it starts idling right.

 

[Usmctanker]

wow i feel like an idiot. my mix screw was waaayyy off. thats why once i got it started it would race up and then die. thanks for the help guys.