Please help! Really old 9.9 Evinrude won't start and keeps flooding

[Valsar]

Hello all, hope someone can give some advice on some trouble shooting steps for this motor. I bought it a month ago, started fine multiple times, took it on the water and it died. Ever since I've been pulling it and fuel starts coming from the prop after 10 pulls or so. I've tried cleaning the lines, cleaning carb, checking fuel hose, the bulb is hard most the time. I've changed the spark plugs, let it sit and evaporate and im Not sure what else to do. Any advice on what it could be?

 

[boobie]

Check your compression and your spark. Spark should jump a 1/4" open air gap on a tester.

 

[F_R]

Have you checked the spark? The fuel won't burn unless something (spark) ignites it.

 

[Valsar]

I've checked the spark, it seems like both of them give one off, but I'm wondering if it's the points under the flywheel. Could it be the spark is not strong enough? I just don't get why all of a sudden it would become an issue.

 

[Valsar]

I did not check it with a spark tester though, nor have I tested the compression

 

[racerone]

Model # required.----You have to do some proper testing as suggested.

 

[Vic.S]

Hello all, hope someone can give some advice on some trouble shooting steps for this motor. I bought it a month ago, started fine multiple times, took it on the water and it died. Ever since I've been pulling it and fuel starts coming from the prop after 10 pulls or so. I've tried cleaning the lines, cleaning carb, checking fuel hose, the bulb is hard most the time. I've changed the spark plugs, let it sit and evaporate and im Not sure what else to do. Any advice on what it could be?

If it is genuinely flooding then the carb float and or float valve is suspect.

You should nevertheless be able to start it and get it to run for a short while by pumping the bulb until it becomes firm ( It does not have to be rock hard and indeed if there is any air trapped in it it will still feel a bit spongy), then disconnecting the fuel line.

Essential though to check the sparks with a tester. If the sparks are weak then check, clean, or replace, and reset the points, check the condition of the coils........ suspect the condensers.

Also as suggested check the compressions but if initially you were able to start it without difficulty they are probably OK unless something nasty has happened.

You say "very old" If it has points ignition I think that makes it 1976 or earlier. The model number will confirm the age.

You will find just about all you will ever need to know about 9.9s and much more, on LeeRoys Ramblings
http://leeroysramblings.com/Outboard Motor Related/OMC outboard related articles.html

 

[Valsar]

Thank you so much , the model number is 10624g , just bought the spark tester and flywheel puller . The spark is the first culprit it seems . I will update once I reach a wall

 

[JohnnyGuy]

I've checked the spark, it seems like both of them give one off... I just don't get why all of a sudden it would become an issue.

Even you are not confident in the spark, based on your comments above.
As suggested by others, get a spark gap tester (<$10) and make sure you get a nice blue spark that jumps a 1/4" gap.
It's a cheap tool and it will save you LOADS of guesswork.

Electrical components are funny like that, they generally either work or they don't and sometimes they quit working for no rhyme or reason.
Have you ever had a router, that all of a sudden needs to be unplugged and plugged back in to work properly? Or a computer that needs to be restarted to work properly? (Now a router and computer are in a bit of a different realm than your magneto system, but trying to get you to understand sometimes there isn't a certain catastrophic event that leads an electrical component to its ultimate demise.)

Also, it helps to post your motor's specific model number from the ID plate on the transom mount bracket so that people can help you better.

 

[Vic.S]

Thank you so much , the model number is 10624g , just bought the spark tester and flywheel puller . The spark is the first culprit it seems . I will update once I reach a wall

10624 makes it a 1976 model.

 

[Valsar]

Yes my apologies, first time boat owner the serial is c65697 . I just bought a spark gap tester and will do as you all recommended. Will keep posted, thank you everyone for the help so far !

 

[Valsar]

How do I determine the 1/4 gap mark and what am I looking for to determine the issue? The guage goes up to 40000 bolts. Will it not spark at all if it can't make the gap? I tried to upload a photo but it won't let me .

 

[tramsdell]

How do I determine the 1/4 gap mark and what am I looking for to determine the issue? The guage goes up to 40000 bolts. Will it not spark at all if it can't make the gap? I tried to upload a photo but it won't let me .

Take a ruler and measure the gap you're setting

 

[Valsar]

Ok, I've done that , no spark at all. Even on the smallest gap

 

[hardwater fisherman]

Disconnect the kill switch and then test for spark...

 

[oldboat1]

Can't quite tell what you have, but this is typical:

Remove both plugs when testing -- gives it a little better chance. Make sure you have a solid ground on the powerhead (the clip). The blunt end goes in the spark plug boot.

 

[thatone123]

Funny as I have a 15 (same motor) that has spark but won't start...unusual….does not seem flooded and since I use a power drill to start it, I get high RPM and it most of the time they always start easy with a drill.

 

[Valsar]

So I removed the flywheel and there's metal shavings everywhere. Looks like the coil is rubbing on the flywheel. Would this be affecting it possibly? The points were set just fine

 

[oldboat1]

Clean it up thoroughly, and reset the coils on their mounting posts. Laminated edges of the coils must be absolutely flush with the flat machined edges of the mounting posts. Tuck in all wires so they won't hit the spinning flywheel. Test for spark.

 

[Valsar]

We have success ! Thanks so much everyone fired instantly after I cleaned everything and did what everyone said.