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Not in the manual

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Boubou

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Hi I am the proud owner of, and slave to, a 1998 Oceanpro 200. I have kept it going OK with the manual on hand but this one isn't there.
The throttles seized up inside the choke tubes and so had to take this stuff off and remove the throttle plates to get out the shafts. I was then able to clean off the crud and lubricate.
Putting them back they tended to jam, when the little locating tab that positions the shafts, was re installed probably because the throttle plates fouled the side of the choke tubes.
It is bad when this happens because the throttles ( which are returned to closed by weak springs) can jam open with alarming results.
Anyone been through this and have a procedure for reassembly?
 
Any pictures of this to explain it a little better ?----------Not sure what you mean by " choke tubes "------Perhaps primer nipples is a better term ??
 
Aha The part through which the throttle shafts pass are called 'throttle body' and sit between manifold and carb.
The upper shaft carries two throttle plates, the lower shaft 1.
There is a coupling between the two shafts.
The plates fit in slots in the throttle shafts and there are two return springs to close throttle when required.
At the bottom, the shaft has a slot, and a clip right there locates the shaft in the vertical direction.
After re-assembling the plates bind in the throttle body once this clip is installed. There must be a procedure.
 
There is no procedure. Actually, Evinrude would probably say that the throttle bodies are not repairable, and they would be replaced.
You run a real risk of having a brass screw come loose, and making it's way into a cylinder. Be absolutely sure those screws are staked again, maybe red Loctite....All that said, I would definitely attempt the fix also.

But anyway....there is no procedure. It is purely a mechanical problem, and you will have to analyze why they are binding.
Are you saying the throttle butterflies and shafts are now free, but only bind when you tighten the metal spring steel coupler?
If so, the couplers may have been "adjusted" sometime in the past. They should be symmetrical, bottom leg of coupler at same angle to the short back side as the top leg of coupler. No weird bending. The angles formed by the bottom leg, the back, and the top leg are NOT 90* either.
There is a slight angle which makes the open side wider than the back side. I hope this makes sense.

I have had jamming in this area, but it was not the throttle shafts, it was that metal connecting clip hanging on the black plastic carb bowl. It will be hanging on the carb bowls for #3 and #4, if this is the problem. You will have a much easier time of fixing this if you do it with the black carb bodies OFF the engine. If everything operates fine and loose, you install the carbs and it jams, look for interference with that connecting clip and a carb bowl.

Good luck. This is one of the serious design faults of this era of V6 loopers.
 
Thanks for the informative post. I have run into all the problems mentioned. It is not a very smooth process.
Right now, after re-assembly it jams as soon as I install and tighten the little clip at the bottom which engages a groove in the bottom of the upper carb shaft. It seems to locate the shaft longitudinally. Both sides do this. If you remove this clip they move freely but can be seen to move up and down slightly as the throttle goes from closed to open.
The port side carb shaft was never removed by the way. The starboard was removed and had white corrosion stuff where it passed through the top.
 
So, looking at the parts pages...you are referring to ref number 6, description "Clip", held on by one screw?
The bottom of the upper throttle shaft would have a groove in it, this clip would slide in, be fastened down with the screw, and hold the vertical movement of the throttle shaft, correct?

I assume you have the throttle body in your hand.....off the engine....and all you have to do is tighten the screw, and the throttle shaft binds?
And you say the binding is up and down (longitudinally) instead of side to side....

Have I got it correct?

I will go down to the shop in a few minutes, and look this over a bit.
 
Trouble is, he is not in the states, I think. Used TB might not be readily available.
I have a few 200 TBs, but they are critical to match up with the black carb assy.

I would not feel real comfortable supplying him used TB's hoping they would match with his carbs.

And shipping overseas.....urrrffff....
 
Ok,,,where is Boubou?
I have looked at a TB, and I have some pics to show.
Is this the place where you think it is binding?

20141106_124955.jpg20141106_124951.jpg

If so, on my TB, I see that there is longitudunal movement of the throttle shaft when partially open. The clip doesn't keep it absolutely fixed. If I close the throttle butterflies, there is NO longitudinal movement.
So, it appears that if you tighten the screw on the clip with the butterflies closed, it is pulling the butterflies against the venturi bore, and jamming. Is that it?

Maybe the re-installation of the butterfly plates is askew.

The TB casting number I have is 340837. Note that is not a part number, but a casting number.
 
Wow...just found out something new.
The TB for a 1996 is different from 97 up.

Note in my pics, the clip is installed on the top of the shaft, while on 1997 up, the clip is on the bottom of the shaft.
My pics are of a 1996 200 hp V6 upper throttle body, and the PN would be 437321, and is used from 1994 thru 1996 on certain models.

This is the concern I have about mixing and matching TBs with black carb bodies. I have seen it too many times when someone has mixed and matched and made a mess.
 
OK Daselbee - Thanks and sorry for the absence -I got busy. The situation is exactly like you describe. The shaft wants to drift up/down a little because the throttle plates interfere with the throttle body aperture. If you let it drift everything is fine.
With hindsight I would not get into this, but if the shaft seizes in the upper sleeve, you don't have much choice.I had to remove the shaft and smooth things out. This seizure can cause the throttle to stick open or at least not return to the proper idle position.
I have frigged with that locating clip to give the situation a bit of slack and so far so good.
 
Sounds like you have it going again. I wonder....if you have the butterfly plates off, and then tighten the bottom locating clip, THEN put the butterflies on, you could kinda move and position the butterflies so that they don't bind. But as we said....you MUST make sure those butterfly holding screws cannot come out and go into the engine.

Good luck with it.
 
That's a good idea. The bolt holes in the plates might be a little oversize and allow for some adjustment. On the screw going loose fear, the screws are very stiff and hard to start - I think they do something to the threads, but I will put a bit of loctite.
 
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