1976 115 h.p. evinrude advise on carb re-build

[raveon]

Going to remove carb today soak it in varsol and give it a good cleaning. Not going to play with the jets cause when motor does start & runs fine but give the float & ports a good cleaning. If anyone has any good suggestions through experience from start to finish (little tricks) would appreciate to hear from you. Thank you in advance.

 

[ezeke]

Re: 1976 115 h.p. evinrude advise on carb re-build

The most common cleaning failure is with the idle jets and the small openings that they feed. The openings are in the floor of the carburetor throats behind the throttle plates. To properly clean these you need to remove the core plugs.

The 115 openings are a little different than the photo but have the same location.

You can verify that the holes are clear by forcing carb cleaner through the idle orifice, but protect your eyes.

Aftermarket kits usually have the rubber tipped float valve needles, which are no longer recommended or used. Be sure to install the spring clips between the float valve arms and the float valve needles as shown.

 

[raveon]

Re: 1976 115 h.p. evinrude advise on carb re-build

The most common cleaning failure is with the idle jets and the small openings that they feed. The openings are in the floor of the carburetor throats behind the throttle plates. To properly clean these you need to remove the core plugs.

The 115 openings are a little different than the photo but have the same location.

You can verify that the holes are clear by forcing carb cleaner through the idle orifice, but protect your eyes.

Aftermarket kits usually have the rubber tipped float valve needles, which are no longer recommended or used. Be sure to install the spring clips between the float valve arms and the float valve needles as shown.

Wow! Thank you ezeke, now going into it with much more confidence

 

[oklacountryboy87]

Re: 1976 115 h.p. evinrude advise on carb re-build

i was looking at those photos and trying to get my boat running better i was wondering what the proper way is to take the core plugs out of the floor? or can you pop them and and then put them back in?

 

[Ranger Danger]

Re: 1976 115 h.p. evinrude advise on carb re-build

The easiest way to take them out is to use an awl or a pick, make a small hole in the top then use something to pry them out. Be careful though because it's only about 1/2 inch or so deep in there. I personally took a utility knife and made a small cut, then used a little screwdriver to pull them out.

To replace, use new core plugs and sit them down in the holes. Then use the rounder end of a socket extension and a hammer to tap them back in.

Raveon, there isn't really a great way to tell if the jets (under the core plugs) are really clean without taking them out. For the high speed jets which are in the bottom of the float bowl, you can take the drain screws out on either side, hold it up to a light and see if you can see through them. I actually used pipe cleaners to clean all the junk out of mine.

You might get by with just cleaning, but everyone on here will advise you to buy and use rebuild kits for both carbs. They come with new gaskets, new O Rings, and a new float kit with needle.

Here's a link to the Top Secret area: http://forums.iboats.com/showthread.php?t=244013

And anything ezeke says is gold. He is SUPER knowledgeable.

 

[oklacountryboy87]

Re: 1976 115 h.p. evinrude advise on carb re-build

I was also wondering...i see guys saying when they take their carbs off and stuff check the needles and stuff well i did not see any kind of needles and i thought i took alot of them apart but still no needles. if you can post a picture or describe how to get to them and check them out thank you

 

[ezeke]

Re: 1976 115 h.p. evinrude advise on carb re-build

The "needle" is the float valve needle which is common to most outboard carburetors. It controls the flow of fuel into the float bowl so that it does not overfill and flood the carburetor.

When properly rebuilt, the needle and seat are replaced with new parts, the needle is connected to the float arm by a spring clip, and the float is generally set at level with or very slightly higher than level with the bottom of the carburetor body with the body held upside down.

With the carburetor held upside down, no air should pass through the fuel inlet if you blow into it.