1994 140hp evinrude runs but stalls at idle.

[Divado7]

ok so i just bought this motor from a guy, hasn't been run in a year. when i fire it up runs smooth for about 30 secs then loads up and stalls out. it smokes ALOT seems like its not getting enough fuel too much oil.. any ideas of what to do?

Also does anyone know where i can get pictures of this motor. The guy i bought it from said it was an 140hp 94' evinrude, but its all white and all the decals are stripped so i'm not sure.

Also does anyone know where i can get pictures of the power head or maybe i need a manual for that? i have a separate hose thats coming from the pisser that seems to go nowheres? doesn't make sense to me.

 

[James R]

Re: 1994 140hp evinrude runs but stalls at idle.

First you need to check the serial and model numbers to confirm that it is as stated. with this information you can then invest in a manual.
Sounds like the carbs need attention. Probably need cleaning and setting.

 

[kenmyfam]

Re: 1994 140hp evinrude runs but stalls at idle.

Not run in a year it needs a basic health check and an impeller at the very least. Go from there. If you don't know when the carb's were last serviced then it is due. Just another question though. Is the gas as old as the last time the motor was run ???

 

[Divado7]

Re: 1994 140hp evinrude runs but stalls at idle.

ok thanks james i'll check that.

and no i drained the tank and put in fresh gas.

impeller = water pump impeller i'm assuming?

and yea i figured i'd have to pull the carbs, he said he bought a carb kit and did that last year when he was attempting to get it going but had the same problem i'm having now...

but who knows if he really knew where to clean them.. or how to reset them...

BUT just for hypothesis sake lets say he really did clean them well and all.. could it be something other than the carbs???

 

[Divado7]

Re: 1994 140hp evinrude runs but stalls at idle.

First you need to check the serial and model numbers to confirm that it is as stated. with this information you can then invest in a manual.
Sounds like the carbs need attention. Probably need cleaning and setting.

ok i checked its actually an 140hp OMC.

 

[James R]

Re: 1994 140hp evinrude runs but stalls at idle.

When you said it stalls at idle will it idle at all, say when not in gear. Does it stall when put in gear in the water or does it stall at some point idling in gear in the water. If it stalls only in gear in the water you could have a couple of cylinders not working. First thing to do is run a compression test followed by a spark test. This would also account for the eccess smoke, fuel is not getting burnt correctly.

 

[Divado7]

Re: 1994 140hp evinrude runs but stalls at idle.

Nope it would stall in neutral on the trailer with muffs, rpms would fall below 600 and stall. i adjusted idle screw so its around 800rpms and it wouldn't stall, but it was still a little rough, bumped it up a little more around900-1000 and it smoothed out. I haven't tried it in the water yet though.

heres another thing i noticed though, the carbs all have fuel flowing out the front when i pump the primer bulb, and theyre always really wet. is this normal or are the needles and seats not seating?

 

[James R]

Re: 1994 140hp evinrude runs but stalls at idle.

Carbs will need to be completely stripped and cleaned. I recommend using Gunk Carb and Parts cleaner and giving them a good long soak. Wash with running water and blow clean with compressed air. Fit new gaskets and seals and replace the needles and seats. Set the float levels per Manual.
Flooding appears to be your problem so the previous guy did not do a job.

 

[Divado7]

Re: 1994 140hp evinrude runs but stalls at idle.

ok I got carb kits, soaked em with carb cleaner, and rebuilt and started right up, ran a bit smoother, but seems to be missing, so i went to get new plugs but all i could find was the NGK equivalent, so i figured ok no biggie, gapped em to .030 like the book says and put em in and didn't even want to start. now the plugs that were in there were gapped at .055 and so then i pulled um out and regapped to .055 and it started but stalled after 3 secs, and didn't want to start anymore. Put the old champions back in and fired right up, but still have the missing. I played and adjusted the carb fuel/air mixture and no dif, it still misses. i guess new champions?! if i can find them.

 

[jonesg]

Re: 1994 140hp evinrude runs but stalls at idle.

Thats why we say get the manual.
On the hose it should idle around 1000-1100rpm.

When its dropped in the water that same idle will drop to 700rpm in fwd gear at idle, that is correct per the book.

"the carbs all have fuel flowing out the front when i pump the primer bulb, and theyre always really wet. is this normal or are the needles and seats not seating? "

If the engine is in vertical position that should not occur.
The floats aren't sealing the needles when the bowl fills.
Time to rebuild carbs with new kits.
I have a 1994 150hp, its a simple job even for first timers.

Get your model number and order the factory service book , best money you'll spend on a boat.
www.outboardbooks.com

Order 4 rebuild kits and watch a rebuild video.
http://www.youtube.com/watch?v=o5cxBMDezuU

Don't soak any black plastic parts in solvent.

 

[James R]

Re: 1994 140hp evinrude runs but stalls at idle.

Is fuel emitting from the carbs or carb when you squeeze the bulb. If not then the needles are sealing. It is common for these carbs to be wet at the intakes. If you have set the float heights correctly then you should have no problem. Plugs are available from NAPA. The next thing would be a spark test but have you checked the compressions. Without that you could be trying to solve something that is unsolvable without a rebuild. Kenmyfam alluded to this in his reply.

 

[Divado7]

Re: 1994 140hp evinrude runs but stalls at idle.

Ok Got new champion plugs and rebuilt the carbs, took it for a lake test, started it up and it idled so so, kind've loping around 800rpm. Ran smooth as could be all the way through high speed. all cylinders firing, then all of a sudden one cut out. and it slowed down. i slowed down to idle and it stalled. didn't want to start back up at first but got it going with some choke/throttle. but it was real sluggish and didn't accelerate fast. so slowed back down and after a little adjusting of the air mixture screws i could hear the cylinder kick in and out then all of a sudden it was good and all cylinders firing again. weird.

but going into idle its still really rough as could be and was stalling out not wanting to restart w/o choke and or throttle, but then would not stay running for more than a few seconds, so i played around with the air/fuel mixture screws more 1/8 a turn at a time, and got it a little better but it still isnt smooth, one lung still seems to be missing at idle and it stalls out when i pop it in gear. yet high speed is all there. takes off no problem. what should i do??? thanks

 

[Divado7]

Re: 1994 140hp evinrude runs but stalls at idle.

ok I got carb kits, soaked em with carb cleaner, and rebuilt and started right up, ran a bit smoother, but seems to be missing, so i went to get new plugs but all i could find was the NGK equivalent, so i figured ok no biggie, gapped em to .030 like the book says and put em in and didn't even want to start. now the plugs that were in there were gapped at .055 and so then i pulled um out and regapped to .055 and it started but stalled after 3 secs, and didn't want to start anymore. Put the old champions back in and fired right up, but still have the missing. I played and adjusted the carb fuel/air mixture and no dif, it still misses. i guess new champions?! if i can find them.

even with new plugs its still missing at idle :/ no difference.

 

[James R]

Re: 1994 140hp evinrude runs but stalls at idle.

Compression test and spark test are still needed. Then we may have a chance of diagnosing.

 

[Kerry11]

Re: 1994 140hp evinrude runs but stalls at idle.

Ok Got new champion plugs and rebuilt the carbs, took it for a lake test, started it up and it idled so so, kind've loping around 800rpm. Ran smooth as could be all the way through high speed. all cylinders firing, then all of a sudden one cut out. and it slowed down. i slowed down to idle and it stalled. didn't want to start back up at first but got it going with some choke/throttle. but it was real sluggish and didn't accelerate fast. so slowed back down and after a little adjusting of the air mixture screws i could hear the cylinder kick in and out then all of a sudden it was good and all cylinders firing again. weird.

but going into idle its still really rough as could be and was stalling out not wanting to restart w/o choke and or throttle, but then would not stay running for more than a few seconds, so i played around with the air/fuel mixture screws more 1/8 a turn at a time, and got it a little better but it still isnt smooth, one lung still seems to be missing at idle and it stalls out when i pop it in gear. yet high speed is all there. takes off no problem. what should i do??? thanks

I have the exact same problem, did you figure it out. Kerry.

 

[Kerry11]

Re: 1994 140hp evinrude runs but stalls at idle.

Ok Got new champion plugs and rebuilt the carbs, took it for a lake test, started it up and it idled so so, kind've loping around 800rpm. Ran smooth as could be all the way through high speed. all cylinders firing, then all of a sudden one cut out. and it slowed down. i slowed down to idle and it stalled. didn't want to start back up at first but got it going with some choke/throttle. but it was real sluggish and didn't accelerate fast. so slowed back down and after a little adjusting of the air mixture screws i could hear the cylinder kick in and out then all of a sudden it was good and all cylinders firing again. weird.

but going into idle its still really rough as could be and was stalling out not wanting to restart w/o choke and or throttle, but then would not stay running for more than a few seconds, so i played around with the air/fuel mixture screws more 1/8 a turn at a time, and got it a little better but it still isnt smooth, one lung still seems to be missing at idle and it stalls out when i pop it in gear. yet high speed is all there. takes off no problem. what should i do??? thanks

I have the exact same problem, did you figure it out. Kerry.