68 evinrude 6hp dire need of help..

[phrozin]

Model - 6082C
New:
Coils
Condensors
Points set at .20
Plug wires
Plugs (good spark both cylinders) gaped at .30
Fuel pump
Fuel lines
Good compression both cylinders
New carb kit
Impeller
Gear oil

My problem:
Starts and idles perfect in a couple pulls
Can get half throttle fine, once i get past half way it boggs down and lose alot of power. As soon as i throttle back to half the rpms go back up. My thoughts are that its not getting enough gas. I have read alot of posts suggesting the high speed having a clogg, but i have had the carb apart a couple times and recleaned (just in case). I still think it is a float/needle adjustment but can seem to get it right. Manual says "even with the carb casting".. Have it set to just that. Need opinions please.. I have a feeling its something small im just overlooking.

 

[Noltz]

Re: 68 evinrude 6hp dire need of help..

Is the float needle unseating correctly? If the float drops away slowly will the needle still fall free?
Is the float level set properly?
Do you have another tank you can try from (debris clogging the pickup?)

It does sound like the main jet is plugged up, but I think you'd notice it before 1/2 throttle. Unless... it could be partially restricted? Did you use a bit of wire to poke through them? Strip a copper strand from some 14 or 16 gauge electrical wire.

 

[F_R]

Re: 68 evinrude 6hp dire need of help..

I agree, it sounds like a dirty high speed orifice plug. But you say You've cleaned it twice, so I'll respect that. Is there any chance somebody replaced it with the wrong one? Can I assume the thick gasket in the center of the carburetor bowl is OK? I do not think it is a float problem. The book is simply saying it should be parallel with the body when turned upside down. Don't try to make it more complicated, and it is not all that critical anyway. Is the carburetor throttle shaft properly synchronized with the spark advance? When it loses power does it do it abruptly? Might be losing spark on one plug and not a fuel problem at all.

Still sounds like a typical dirty orifice plug though. Sorry 'bout that.

 

[Tim Frank]

Re: 68 evinrude 6hp dire need of help..

A couple of really important bits of info that seldom get included in an OP are :

1) Is this a new problem? i.e. have you wrestled with this for months or has it just happened? OR, has this EVER run properly for you?

2) If it is a new problem, did you buy the motor new or did you buy it used? If used, that changes the equation a bit because you really can't make ANY assumptions about the motor. If you buy new, you can reasonably assume that the motor is 100% OEM except for mods that you have made, but even that is not a sure bet.

Your list of actions so far is really helpful.
I'm with F_R.....I'd go back at the high speed orifice.....especially if this motor was picked up 2nd hand AND has never run correctly for you. It could be restricted, or even have the wrong jet installed.


Those HS jets can get varnished up and become a constriction. The current jet is #324020 according to my chart it has an ID of 0.049"....so a 3/64" drill should be a slip fit in that jet.
You can use that drill as a gauge.

 

[Tim Frank]

Re: 68 evinrude 6hp dire need of help..

........ Did you use a bit of wire to poke through them? Strip a copper strand from some 14 or 16 gauge electrical wire.

14 and 16 AWG wire are both too big to fit through that jet.

 

[phrozin]

Re: 68 evinrude 6hp dire need of help..

Ordering a new highspeed nozzle. Will be soaking the carb in seafoam until the highspeed comes in, and will blow it all out.
Regular sea foam or deep creep?

 

[Anchor Marine Repair LLC]

Re: 68 evinrude 6hp dire need of help..

Model - 6082C
New:
Coils
Condensors
Points set at .20
Plug wires
Plugs (good spark both cylinders) gaped at .30
Fuel pump
Fuel lines
Good compression both cylinders
New carb kit
Impeller
Gear oil

My problem:
Starts and idles perfect in a couple pulls
Can get half throttle fine, once i get past half way it boggs down and lose alot of power. As soon as i throttle back to half the rpms go back up. My thoughts are that its not getting enough gas. I have read alot of posts suggesting the high speed having a clogg, but i have had the carb apart a couple times and recleaned (just in case). I still think it is a float/needle adjustment but can seem to get it right. Manual says "even with the carb casting".. Have it set to just that. Need opinions please.. I have a feeling its something small im just overlooking.

1) If you think it's lack of fuel, it's easy to prove. When you hit that dead spot, dust the carb throat with carb cleaner. If it perks up, then the motor needs more fuel. If it has no effect or slows down, then it's NOT a lack of fuel.
2) Without the motor running, and the motor in gear... twist the throttle to wide open, and see if your carb's butterfly is completely level. You might have a situation where the sync/link is set up too bottom heavy, then goes past wide open and actually starts to close.
3) For your own information, the way you're describing this can't be a float setting issue. If motors consumed gas that fast, the world would be out of oil. A float setting can be set quite lean, and still get up to WOT. It might surge when it gets there, but not if your float is set level to the casting.

 

[Tim Frank]

Re: 68 evinrude 6hp dire need of help..

Why are you replacing the nozzle?
There should be no problem cleaning it.
That 3/64 drill bit would do it.

 

[phrozin]

Re: 68 evinrude 6hp dire need of help..

Great info about the lync and sync. The cam follower does have about 1/8 in wear in it and i was going to fill/patch it with jbweld or epoxy, since they are obsolete. Ill check that when i get home from work. side piece of info that i forgot to add. While running in gear where it drops off, if i pull the choke for a second and push it back in. It gets peppy for a second. That is another clue that leads me to believe its starving for gas once it gets past half throttle.

 

[Noltz]

Re: 68 evinrude 6hp dire need of help..

14 and 16 AWG wire are both too big to fit through that jet.

"... a copper strand from...", not the whole wire. I twisted 2 strands together to clean out the passages on my 40. Also a torch tip cleaner has multiple thicknesses of wire with a slight serration to them, but I don't know if they'd be long enough to get in where you need to clean (they were not long enough for mine). Please take a moment to fish some wire through the circuits and make sure you're getting fuel to the nozzle. Tim's chart number is extremely helpful there - drill bits are a few bucks and guaranteed to get all the dirt out.

Tim F's questions about when & how are valid and I should have asked the same. If a customer drops a car in front of me sometimes I don't have all the answers and have to fix the issue at hand. Assume nothing and keep it simple; Fuel, compression, spark. He's addressed two.

Regular seafoam is fine for this situation. Use a wire basket if you have one and dunk the carb completely, sloshing it in the morning and afternoon to dislodge any loose sediment.

 

[phrozin]

Re: 68 evinrude 6hp dire need of help..



Highspeed on the right is the nee one marineengine.com sent me for my model. The one on the left is the one that was in the carb. Which one do i use? The jet holes appear to be different sizes and one side of the new one only has one jet. Help me choose.. Also attached is the junk that came out of the carb after 4-5 days of soaking in seafoam.. Hope that solves my problem.

 

[Tim Frank]

Re: 68 evinrude 6hp dire need of help..

View attachment 211594View attachment 211595View attachment 211601

Highspeed on the right is the nee one marineengine.com sent me for my model. The one on the left is the one that was in the carb. Which one do i use? The jet holes appear to be different sizes and one side of the new one only has one jet. Help me choose..

I think I answered that in post #4.....although you couldn't be bothered to answer my questions, so you may not have even read it.
With no more information (you know....like part number you ordered etc. and on my screen the jets are top and bottom, not left and right), the best advice I can offer at this point is to make a calculated guess....maybe "eeney-meaney...." :facepalm: