Hey F_R

royal0014

royal0014

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Johnson SuperSeahorse RK-28B (1966) Electramatic 40 horse.

So I'm gonna rebuild the spare carb I picked up on Flea-bay last year. Please refresh my memory, 'cause I can't seem to locate the cd-rom with my manuel on it.....

As I remember, the high-speed 'jet' is a fixed orfice in the bottom of the bowl, behind the drain screw. It could be removed, if you have the right size screwdriver. It was pretty gunked up in there, with a hole through the middle. It actually looked like there was no orfice in it, but I could not tell for sure. Got the bowl soaking in carb cleaner, I'll get a better look tomorrow.

Also, I pulled the low-speed needle to see if it needed replaceing. Nice and straight, no wear at the seat. But there is a tiny dimple on one side, in the middle of the point. Hard to see, but I can feel it with a fingernail. I'm thinking a real light shining up with some 1200 grit, or would that be asking for trouble?

Thanks for the help. :)


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HighTrim

HighTrim

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Re: Hey F_R

Im by now means Frank, but check the Top Secret Files for a thread regarding carb rebuild. It will show you how to make the driver to remove the fixed jet. Just be careful not to damage it, but in my experience it needs to be removed to clean properly.

Regarding the slow speed jet, could you post a pic of it? May do more damage than good taking emory cloth to it, I have seen some real mangled needles come out of motors that people tried to file down. Not saying that it cannot be done. I personally just pull one out of a parts motor. You can also get them fairly cheap on ebay. If the needle is toast, cant hurt to try to repair it by putting a drill in a vice, and put the needle in the drill on low speed. This will let you polish it uniformly.
 
F

F_R

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Re: Hey F_R

I cringe when people try to remove the orifice plug without the special tool. But some manage to do it. Probably more mangle it. Bottom line is it must be absolutely, positively clean, without even a trace of any goo or crud in it. You can buy the proper screwdriver from any Evinrude dealer. It may save you a carburetor bowl.

The slow speed needle is not as high tech as people believe. It is nothing but a glorified faucet. Screw it in to shut off the flow, and open it to increase the flow. Even if severely buggared up, it will do that. Thing is, if buggared up, it will be more (or less) sensitive to an equal amount of turning.
 
samo_ott

samo_ott

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Re: Hey F_R

I asked at my OMC dealer for the proper screwdriver and they said they didn't have it. Mind you I did not have a parts #. Does anyone know it as I would like the right tool. I hate taking those high speed jets out with my homemade one as it does not work that well and I dont always get them out.
 
oldcatamount

oldcatamount

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Re: Hey F_R

I got mine on E-Bay. Do a "search" using "high speed orifice removal tool" as key words. It worked for me. Got the tool for 20 bucks.
 
royal0014

royal0014

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Re: Hey F_R

For the record, I did not say I would remove the orfice, screwdriver or not. Just couldn't remember if it would come out.....that and with the gunk in it, I could not tell if it is even in there. I'll find out after an overnight soak.

And I agree with the 'glorified faucet' F_R. Think I'll leave it alone and run it.

Thanks guys :cool:


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HighTrim

HighTrim

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Re: Hey F_R

I think you misread what Frank was saying. He said the low speed needle is a glorified faucet. The orifice plug is a whole other story. It must be ABSOLUTELY clean or you will never be able to fine tune it, or run it at all. We just say be careful because they are easily ruined, but dont let that deter you from cleaning your carb properly. Do a search on here for high speet jet or orifice plug, and you will see the thousands upon thousands of motors that arent running up to par due to dirty orifice plugs/fixed high speed jets. They need to be removed, have wire run through them, etc... No crud or varnish at all.
 
samo_ott

samo_ott

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Re: Hey F_R

Is that the right tool? It sure doesn't look like it's a flat headed srewdriver on the tip? But if it is I can call my dealer with the part #.
 
samo_ott

samo_ott

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