carb help

[epflynn]

1986 35hp merc. i just replaced the switch box since i was only getting spark from one cylinder, i replaced the float and needle, problem is before i changed the switch box i could get it running but took a while now that i replaced the switch box i cant get it running, i have plenty of spark on both cylinders, it just cranks and sometimes back fires but won't start. i also have gas coming out of bottom of butterfly. i have tried evrything and i am getting no where, i don't want to burn up my starter, any help would be greatly appreciated i am trying to get my 4 year old out on the water before theres no summer left Thanks

 

[epflynn]

Re: carb help

also i have tried shutting choke half way to make sure its not starving for fuel and i have squeezed the primer bulb when i had it running to make sure fuel pump is not the problem but still no luck fuel pump is good any help Thanks

 

[jhodge]

Re: carb help

I had problems like that with my 86 60hp 3 cyl engine. The manual said to test various components and I found the stator to be bad. But it still would not start, just buck and sneeze and misfire. Checked all the wiring and found nothing. It was set up for firing order 1 2 3. Was looking at the head and noticed that the firing order was 1 3 2 . Switched the two leads and presto it ran again. It was interesting to note that coils from top to bottom are 3 2 1 as are the switch box posts. Don't know if this translates to your engine but you might check out the wire routing. JH