Help 9.9 evinrude way too rich

[steves937]

New to me, 1993 9.9, I cleaned carb, adjusted float setting, got the engine to idle like a dream, but as soon as your off that idle curcuit the smoke pours, raw fuel out the exhast, carb intake gets slimmy, and to get that far I removed the cowling and silencer just to keep it slopping along with very little power, if I disconnect the fuel line as she leans out the 22 foot boat will almost get on plane, I know its not the float setting, I can idle all day long, Good compession, and plenty of power as she runs lean. I believe electric choke valve is correct, becase i use it to start and it can kill the engine when warm
So i question exhast blockage, maybe some else put to big of jet?. Also don't know what small fuel line for? Is this part of the choke?
What about bad reed, could that be causing my slobbery rich problem?
Gas is fresh 50 to 1
Ideas and guesses very much welcome


thank you

 

[mikesea]

Re: Help 9.9 evinrude way too rich

it would be more helpful if you had pictures of the hose your talking about,but you should have a hose from the choke/primer to the carb,the choke valve should NOT be at a 90 degree angle with primer ,it should lie parellel,when you cleaned the carb are you certain you cleaned it according to instructions given here ,with solutions and compressed air,also ,that eng has a little tube in the carb and gasket ,did all parts go back,try looking at the BRP website,I tried to pull up the carb breakdown 4 you ,if it dont come up search BRP and then your yr and hp
http://shop2.evinrude.com/ext/index.aspx?s1=bf6ad09c53cead335fcfd8a6471c0f7f

 

[steves937]

Re: Help 9.9 evinrude way too rich

Yes, I dipped the carb, blew out passages set float level, checked it by turning upside down, there is a small internal hose inside the carb, it is there.

I think I might try looking at the diapharm pump, is there any way the pressure could be to high, or leaking fuel somewhere its not suppose to?

I might try ordering some smaller main metering jets, I wish there was a high speed adjustment on this carb.
i just can't get enough air above idle, maybe my exhaust is restricted somehow?
Thanks

 

[mikesea]

Re: Help 9.9 evinrude way too rich

it could be your pump diaphram has blown out,remove the mounting screws and see if gas pours out the back thru the pulse pickup hole,squeeze the ball,iiif gas comes out the hole you need to rebuid the pump

 

[steves937]

Re: Help 9.9 evinrude way too rich

Ok, I tested the diaphram pump as descirbed above. there is no fuel coming out the pluse nipple, with the fuel hose ball pumped up hard.
There is black grease in the prop and in exhaust and all over the water pump housing. I have checked my gear oil and it is level is fine and has no water in it. It also smell different than the grease i'm finding in the exhaust.
Again this is a used engine new to me I wounder if this grease is unburned congealed oil. Or did someone prior mess something up?Thinking about removing exaust plates from crank case to see if it is pluged up with this greasy goo?
Anyone ever seen anything like this?

 

[mikesea]

Re: Help 9.9 evinrude way too rich

what your explaining is a typical oil discharge of an engine with too much oil.Is it possible that the eng was fogged up for storage,or too much oil in the gas,just sounds like a lot of oil discharge.did YOU mix the gas.A pint to 6 gallons.Any chance someone put something in your tank,like diesal.

1)how long you own the motor

2)have you ever had a good run with the motor

3)who owned it before if you didnt have it long and contact them if possible about the fogging question

you could expect such a smokey response if it was fogged up,it shouldnt take too long to blow it out ,but have you been able to run it for 15-30 minutes.

 

[crxess]

Re: Help 9.9 evinrude way too rich

Is it dumping excess fuel from the choke/enriching circuit?

Only know what I have read, but don't these use an enricher instead of a traditional choke plate?

 

[steves937]

Re: Help 9.9 evinrude way too rich

I have only had the engine out twice, never a good run, other than it idles fine, but as soon as you open the throttle here comes the smoke and it is sloppy rich will not get up and go, agian if i remove the fuel hose it runs for a good while and as its starts to lean it's like hitting the after burners i have nursed it along by reconnecting the line for a few seconds (I know bad idea). did this for about a half hour, I think there is some improvement but not much, The fuel i,m using is 50 to 1 and have ran a different outboard on the same tank i'm using now.
Was told the engine came off a poontoon boat that was in a sportsmen club, So only God knows what this was subject to. It might not have been the best engine to buy, but remote control, long shaft two stroke 9.9s are hard to get in my neck of the woods and I wanted one.

I will have to read up on testing the enrichment system, I would guess it would be on or off, Is there fuel moving through this when NOT pushing the switch, I now I can kill the engine with it, so I think its working OK

 

[Rick.]

Re: Help 9.9 evinrude way too rich

Have you checked for a good strong spark on both plug wires. I'm wondering if you have a bad spark on one cylinder. It would idle fine but not deliver the performance your looking for above idle when it is under load. I have had a reed problem (and not many have) on a 79 -9.9. My problem was the lower cylinder was flooding with gas to the point it would not fire. I tried everything I (and others from this forum) could think of. Eventually I pulled the power head and looked at the reeds. What I found was a piece of plastic was stuck in the reed. The plastic was from the slow speed idle knob which had half the end missing when I got the motor. It had run perfectly fine during my tune up efforts during the winter. On my first trip in the lake it ran like a dog. I figure the plastic must have been sitting in the bottom of the reed plate and either during transport to the lake or at full throttle, not sure which, it moved into the reed valve. Reed problems are very, very rare but not impossible as I found out. Again, the symptom was a flooded bottom cylinder. Hope this helps. Best of luck. Rick.

 

[steves937]

Re: Help 9.9 evinrude way too rich

Good sparks
You know i think there is some plastic missing on my idle mixture knob.
I wounder if the reed was dirty/broken/stuck- would compession check show low?
It will be a few days before I get back to working on it, Thanks guys, I got a game plan, will check enrichment system and reeds, and order a new jet to make sure I have the right one.
Will let you know what i find
Thanks again

 

[bktheking]

Re: Help 9.9 evinrude way too rich

Typically when there is a reed problem it will puke fuel back out the carb. You state that the carb intake gets slimy, slimy with oil and fuel? It may be your reeds if this is the case.

 

[Daviet]

Re: Help 9.9 evinrude way too rich

After rereading your posts you mention that you can unhook the fuel hose and the engine will lean out and run great until you have to plug the hose back in. By doing that you are regulating the amount of fuel in the carb bowel, just like the needle and seat does. This almost proves that you have a rich fuel problem.

Any chance there could be something holding the needle open? Can you disconnect the line from the primer to the carb and see if it helps, maybe primer is leaking fuel into carb, causing the carb to get slimmy and run way to rich.

These are just some thoughts I had.

 

[bktheking]

Re: Help 9.9 evinrude way too rich

He said the bulb pumped hard on the line, if there were a needle and seat problem the bulb wouldn't get hard , would it? I thought the bulb got hard cause the float rises causing the needle close in the seat not allowing any more fuel to flow. Could be an incorrect main jet causing it.

 

[Daviet]

Re: Help 9.9 evinrude way too rich

Should be easy to tell if the jet is wrong, compare number on the jet to the parts breakdown.

 

[steves937]

Re: Help 9.9 evinrude way too rich

There was slim in the carb bore mostly past the butterfly (engine side), but some made it back to the air silencer, also I have blown into the primer line and seems tight but when i drew on it i got some fuel. I think were on the right track with looking at the reeds and inrichment valve.
I believe the float needle is fine because i been there 3 times looking, testing seal and even adjusted to close a little lower level than specs.
Boy you sure have to be careful with the plastic carb bowl, I had to buy one after cracking it, the new plastic one seems a little more durable.
Thanks

 

[jonscott]

Re: Help 9.9 evinrude way too rich

This sounds silly, but I had the same problem after I rebuilt the carb on my 9.9. Check to make sure that you put the carb drain screw in the right hole on the carb bowl. Mine had two holes, one threaded/plugged, one threaded/open. I put the screw in the wrong one and was having the exact same problem.