Evinrude 15 1992 carburetor cover change

[Mikko]

I am installing a new carburetor cover to replace the broken plastic one. I found very strange pins (seen in figure) in carburetor top surface, and I do not have any idea of their purpose except a trial to repair the broken plastic cover, where two pieces were also glued. Does anyone have idea about the purpose of those pins? There are no holes in gasket or cover for those pins. It was easy to remove the pins, but I think the small holes in the carburetor surface are original?

 

[saltchuckmatt]

I am installing a new carburetor cover to replace the broken plastic one. I found very strange pins (seen in figure) in carburetor top surface, and I do not have any idea of their purpose except a trial to repair the broken plastic cover, where two pieces were also glued. Does anyone have idea about the purpose of those pins? There are no holes in gasket or cover for those pins. It was easy to remove the pins, but I think the small holes in the carburetor surface are original?

They don't show any pins in the parts breakdown

 

[Mikko]

This is ok now. The small holes are probably kind of air vents. They became covered by the cover gasket.

 

[saltchuckmatt]

This is ok now. The small holes are probably kind of air vents. They became covered by the cover gasket.

Doesn't explain why someone put pins in them.

 

[oldboat1]

Use a small pick (even a tooth pick) to see if the holes in question are open air holes. It's been too long, and my memory is too short, but are there four or five pegs coming down from the cover (with some broken off)? Probably for placement of the gasket?

There are two or three gaskets of differing configurations in the carb kit, and holes there might be a clue to open vents.

 

[909]

No .

Those pins do not belong.

What you got there was rigged by Jerry.

 

[saltchuckmatt]

No .

Those pins do not belong.

What you got there was rigged by Jerry.

Jerry...? Jerry Lewis....Springer? ; )

 

[909]

Jerry Rigged - when you're too cheap to buy OEM parts

One time I tried to clean a black smudge off a cowling, ... but the smudge was paint .

No amount of scrubbing was getting it off .

Only to realize the entire cowling was "hand" done ... letters, stripes and all. Even the silver fading.

I knew something was off lol.

What a true artist !

 

[saltchuckmatt]

Jerry Rigged - when you're too cheap to buy OEM parts

One time I tried to clean a black smudge off a cowling, ... but the smudge was paint .

No amount of scrubbing was getting it off .

Only to realize the entire cowling was "hand" done ... letters, stripes and all. Even the silver fading.

I knew something was off lol.

What a true artist !

Well at least if was "Jerry" you have a chance. If it was his cousin "Jimmy" then you were done!

 

[Mikko]

Back to my original message. I changed the carb cover (0337833), gasket (0334043) and needle valve (0435356) after carefully reading LeeRoy's ramblings (https://www.leeroysramblings.com/Johnson_9.9_carb-fuel_pump.htm). When I tested the motor, I could not get it idling without choke. I am not sure how I did the initial needle valve adjustment (may need a new adjustment), but obviously it was running too lean, and tuning it richer did not help. Now I'd like to ask if someone knows whether those small holes (covered by pins in the first figure) are original? If not, then I probably should plug the holes as they were before the cover change, and motor was idling well.

 

[Mikko]

It is clear that those two holes in the upper right corner of the carburetor surface definitely don't belong there. They have been drilled through the wall, and the other one most likely causes air leak since my new cover gasket covers only the upper one. What would be the best way to fill the hole(s)?

 

[909]

I've had success with JBweld Marine.

It's resistant to gas and 2 stroke oil.

Clean throughly while wet , saves you from a hard to deal with mess when dry.

 

[saltchuckmatt]

Back to my original message. I changed the carb cover (0337833), gasket (0334043) and needle valve (0435356) after carefully reading LeeRoy's ramblings (https://www.leeroysramblings.com/Johnson_9.9_carb-fuel_pump.htm). When I tested the motor, I could not get it idling without choke. I am not sure how I did the initial needle valve adjustment (may need a new adjustment), but obviously it was running too lean, and tuning it richer did not help. Now I'd like to ask if someone knows whether those small holes (covered by pins in the first figure) are original? If not, then I probably should plug the holes as they were before the cover change, and motor was idling well.

Why would anyone do that?? And what I don't understand is in your original picture they were sticking out....how did the plastic cover even go on?

You need a close up of someone else's carb.

 

[Mikko]

As I told in the first message, my guess is that someone tried to fix the broken plastic carb cover (trying to keep broken pieces together) by this strange way with Sikaflex sealant. I have now a new cover with a new gasket and needle valve. I took the needle valve only 1½ turns out from lightly bottomed out, but the correct turns would be: "It has been found that for the post 87s, that have the plastic top, the presetting is about 4 turns out, probably because of the finer threads on the needle as compared to the earlier needles".

 

[909]

The factory service manual calls for 3 turns CCW from lightly seated as a preliminary adjustment

Once the engine is warm, adjust the screw until the highest rpm is achieved on slow.

From that position, add an additional 1/8th turn CCW.

Test to see if it stalls from full throttle to slow idle (quickly) and adjust as necessary. Ideally on water, and under load.

You should aim for 700-800 RPM , (650 rpm minimum) .

 

[racerone]

Is there a number on the carburetor body ?

 

[Mikko]

Number is here

 

[Mikko]

Extra holes cold welded

 

[Mikko]

I come back to this Evinrude 15 carburetor issue. I tested the motor today and found that it works well except with idle. It idles only if I pull the choke a bit out. Any suggestions for the next step? Obviously problem with the low speed circuit, just some depris in the jet??

 

[oldboat1]

The carb kits I've purchased for plastic topped carbs come with multiple (3) different gaskets. It's possible you used the wrong gasket. I have never done any filling of holes, and believe that is probably a mistake. Sorry.