1993 evinrude 15 hp idling problem

[gatotom]

It starts one or two pulls with the choke out but after it is warmed up and push the choke in, it dies. In fact can not make it run without the choke out, anybody have a clue what needs to be adjusted, thanks for your time.

 

[Joe Reeves]

Your explanation indicates a fouled, clogged, gummed, carburetor in need of cleaning, rebuilding as needed.

 

[thatone123]

I 2nd that emotion!

 

[gatotom]

So, gummed up carb, just tried adjusting idle screw in handle and turned it all the way left and pushed choke in and its off to the races

 

[flyingscott]

What idle screw in handle? Are you talking about the knob that sticks out of the tiller handle? If you are that is not an idle screw. That is a throttle lock for trolling it allows you to lock the throttle in place so you can maintain a speed. The low speed screw is on the carb. You need to take it apart and clean it be careful the plastic on them breaks easily. And on some models expensive.

 

[Joe Reeves]

So, gummed up carb, just tried adjusting idle screw in handle and turned it all the way left and pushed choke in and its off to the races

Wow... Great!! Us guys with 30 or 40 years experience have just learned something new. Thank you so much!

 

[iggyw1]

"You can take a horse to the water, but you cannot make him drink". My motor (6 h.p. 'rude) acted the same way his did, and when I locked the trolling speed in a bit faster VIA knob on handle, it was "off to the races" for me as well, but it trolled too fast. He will find that his trolling speed will not be slow enough until he cleans that carb like I had to. I took your guys suggestions and he will end up doing it too if he wants to troll at the right speed.

 

[thatone123]

If a outboard has been trolled for a long time sometimes an "Italian Tune - up" is in order. That means at least 10 minute run above 3000 r.p.m. Works wonders sometimes.

 

[iggyw1]

If a outboard has been trolled for a long time sometimes an "Italian Tune - up" is in order. That means at least 10 minute run above 3000 r.p.m. Works wonders sometimes.

Especially with some Seafoam in the gas.

 

[Joe Reeves]

If a outboard has been trolled for a long time sometimes an "Italian Tune - up" is in order. That means at least 10 minute run above 3000 r.p.m. Works wonders sometimes.

Or roughly 150 psi of pressurized air shot into the drain screw hole.

 

[iggyw1]

Or roughly 150 psi of pressurized air shot into the drain screw hole.

Joe, is this for real? I am just wondering if I did shoot about 150 psi of air into the drain screw hoe on the carb, wouldn't that just push the float up drastically and close the needle valve really tight?? If it would help get any "gunk" out, I will do it every once in a while to keep my carb clean. I did it before into the hole where my slow idle needle is at by removing the needle and shooting it with air, but that was way less pressure.

 

[Joe Reeves]

No Iggy... It was pure sarcasm. I'm simply getting tired of taking my time to practically draw out a map to explain how faults are created and exist along with the methods of which they are solved, only to be ignored to have the poster suggest that they think they'd be better off to do this or that. It was one of those times that somebody... some boater actually suggested that instead of cleaning and rebuilding his carburetor, that he could blow it out on the engine with pressurized air. I have for many years worked with various website forums and don't remember which one that was.

I really didn't expect anyone to actually think I was serious with that above mention as I'm sure it would raise havoc inside that float chamber.

 

[jakedaawg]

If a outboard has been trolled for a long time sometimes an "Italian Tune - up" is in order. That means at least 10 minute run above 3000 r.p.m. Works wonders sometimes.

This is poor advice if one suspects a carb needs attention. The offending carb could cause a premature ventilation of the block. On the other hand, a ventilated block could be used as a teaching aid similar to a cut away...

 

[oldboat1]

^^Nice! Save the block pieces for display purposes -- and put the old carb on eBay ("as is", of course).