1993 Evinrude 15HP Does not start without tilted and dies quickly.

[apikoreef]

Hi,

I have 1993 Evinrude 15HP, 2 stroke, manual start, long shaft outboard. It gives me hard times when starting and running lately.

I run it during 4 hours in all low and high speeds without a problem but it stopped getting when the fuel tank is near empty. I added gas and oil in 50:1 ratio and tried to start again it but I was not successful.

I cleaned spark plugs first (there were wet oily fouling), then change them with new set (sevice advised Champion), then cleaned fuel pump and carburator and assembled them again.

Now, starting is not easy. Seldom it starts in the regular levelled position but generally it needs to be tilted a bit higher than the usual level position (propeller is still in the water). In this position motor starts and runs. I can level it down after it starts. Idle is somewhat OK despite low RPMs creates too much vibration and gives me a "gonna stop now or anytime!" feeling.

When I stop it using kill switch or running out gas taking out the gas fuel line jack, generally I need to tilt it again to start again. It stops by itself when I decrease RPM low in idle.

I checked fuel line and fuel comes to carb through the system. Both spark plugs has sparks also. All new spark plugs have wet oily fouling after a couple of running.

I can idle it as long as I want when it starts but when I try to use with forward gear it I have the real problem. I start with forward gear and after running a couple of hundred meters the motor dies as if it can not get any gas. Re-starting is a headache as I have outlined before. Shovelling back to marina is a good sight for me as you might understand.

The outboard runs at land with muffs and hose without a problem (in tilted position of course) but I need a motor runs in the sea as well.

I suspect either fuel float and its system is troublesome or upper neoprene gasket in carb is not aligned correctly. I tried to re-install carb a couple of times but seems useless.

I became helpless and desperately seeking for help.

All sound and knowledgable advices will be appreciated.

Best regards.

 

[tashasdaddy]

Re: 1993 Evinrude 15HP Does not start without tilted and dies quickly.

having to tilt it makes me point to the float, misadjusted. did you use a rebuild kit, when you cleaned the crabs? did you saok the carb and blow out all the jets? you must set the idle high when running on muffs or it won't run in the water. on muffs there is no back pressure on the exhaust, as there is in the water.

 

[apikoreef]

Re: 1993 Evinrude 15HP Does not start without tilted and dies quickly.

Unfortunately I did't have any repair kit at hand so I just used the original parts for reassemling it.

I ordered repair parts but it will take a couple of weeks to get them.

Witout the repair kit, I tried to soak the carb components in the gas fully and blow air with my mounth (tastes awful), then carefully reassebled. I followed the sequance of screws, tried to place upper neoprene gasket tidly.

Float moves freely, float valve and seat opens and closes with the float move. I am not sure about their exact position but

I don't know any other alternative. Any suggestion?

 

[tashasdaddy]

Re: 1993 Evinrude 15HP Does not start without tilted and dies quickly.

when you turn the carb upside down the float should be level with the outer case on the carb. when you take it apart again use carb cleaner instead of gas, you can buy a can of compressed air at the auto parts store. unfortunately 90% of hte time yu don't use the kit youwaste your time. good luck. keep us posted. don't put plastic in carb cleaner.

 

[apikoreef]

Re: 1993 Evinrude 15HP Does not start without tilted and dies quickly.

OK thanks for now.

I will make the necessary rebuilding in weekend. I hope the repair kit arrives until then. Otherwise I need to stick to the old parts again.

I will post my experiences later on.

 

[apikoreef]

Re: 1993 Evinrude 15HP Does not start without tilted and dies quickly.

Hi,
I rebuilded the carb and found out that the float was a bit sinking in when turned upside down and the main orifice was blocked "just a litte bit". A careful cleaning worked out and outboard was back to the life.
I found out that fuel related problems masked the real one undermining my weekends. The real one is a faulty kill switch cable being clamped under the throttle cable and the arm. The cable creates some kind of grounding when it is squeezed by the arm and kills all the electrical activity including the the spark from time to time.
The squeezing was intermittent, so was very hard to distinguish and find out. Tilting the outboard was relieving the pressure and kill switch returned back to normal. I managed to find it out and fixed it, thanks to a good service manual and your good advices.
Everything is OK now except excess white smoke both in starting and regular using. I hope I can manage it too, making a good tune up.
Do you have any advice on excess white smoke issue?
Thanks and regards.

 

[tashasdaddy]

Re: 1993 Evinrude 15HP Does not start without tilted and dies quickly.

white smoke usually means water mixed with exhaust, don't know where you are and if you have only ran on muffs. make sure it's not running hot.

 

[apikoreef]

Re: 1993 Evinrude 15HP Does not start without tilted and dies quickly.

I tried with muffs and smoke is quite visible in the air coming from the exhaust. I tried in sea water and I see exhaust bubles raising from my trail in the back. When I changed the gear to neutral and run in idle smoke is evident. White Smoke is a regular thing now, in short.

If it is related with water, what can be the reason for it? Impeller and water pump, or an old head gasket allowing cooling water flowing in the powerhead?

Best regards.

 

[tashasdaddy]

Re: 1993 Evinrude 15HP Does not start without tilted and dies quickly.

could be head or exhaust gasket, where are you if it's cold there it will increase the density of the exhaust, as a car idling in the snow.

 

[apikoreef]

Re: 1993 Evinrude 15HP Does not start without tilted and dies quickly.

Humidity and air temperature can be an issue but I am not in a cold and humid environment.

I think I am running the gas/air mix on the rich side and need to adjust it.

But when I try to make the mix leaner the idle rpm 'faints' and starts to choking and sneezing. So I need to stick to a richer mix than usual. I do not know why. But the reason for smoke can be this rich mix.

Can you suggest a solution for unable to adjust a leaner mix?

Regards.

 

[knownascrll]

Re: 1993 Evinrude 15HP Does not start without tilted and dies quickly.

hey man your having the same problem as i am . Ive replace the coil, rebuilt the carb. rebuilt the fuel pump. bought a new gas tank. also a new gas valve for the tank . still having the same problem .Ive come to the conclusion that it is the power pack when it gets hot it shuts off.