Omc tilt problem

[Impazteck]

Hey guys new to the whole forum thing I have a 77 omc stern drive power tilt well see it won't go up or down now and when I go to lift it up it just drops back down so I opened the clutch cover and the worm gear is spinning but the shaft isn't engaging any ideas?

 

[Nivekt]

Re: Omc tilt problem

Sounds like your clutch pack is having issues. Not exactly sure if the electric stringers are like the mechanicals in regards to the tilt clutch packs, but check out this video to give you some ideas. OMC Tilt Clutch - YouTube Im sure someone with more experience will be along shortly.

 

[Impazteck]

Re: Omc tilt problem

Thanks for the quick reply I looked at the video my clutch assembly looks a little different mine doesent have the pin that runs through the shaft, but I looked close at my clutches and they are pretty smooth now and black and the oil looked pretty milky I'm assuming my clutches need replaced and that there was water in there that caused it to get milky I got to looking and the clutches are pretty pricey so I'd like to I know thats my problem before I shelled out 200 dollars for a used clutch assembly

 

[Boomyal]

Re: Omc tilt problem

Thanks for the quick reply I looked at the video my clutch assembly looks a little different mine doesent have the pin that runs through the shaft, but I looked close at my clutches and they are pretty smooth now and black and the oil looked pretty milky I'm assuming my clutches need replaced and that there was water in there that caused it to get milky I got to looking and the clutches are pretty pricey so I'd like to I know thats my problem before I shelled out 200 dollars for a used clutch assembly

I cannot say for sure, as I have never had to take my '75 (same as your '77) clutchpack apart, but there is some indication that the electric shift clutchpacks had to be pressed apart to diassemble them. It is too bad that the youtube vid does not mention the years for the clutchpack demonstrated.

 

[Impazteck]

Re: Omc tilt problem

I cannot say for sure, as I have never had to take my '75 (same as your '77) clutchpack apart, but there is some indication that the electric shift clutchpacks had to be pressed apart to diassemble them. It is too bad that the youtube vid does not mention the years for the clutchpack demonstrated.

So in order to put the clutches back together they have to be pressed together? Is that right?

 

[Boomyal]

Re: Omc tilt problem

So in order to put the clutches back together they have to be pressed together? Is that right?

It's my vague recollection that they have to be pressed to be released then pressed to be re-assembled. But I am not absolutely sure. I went out to look at mine to see if there was that allen screw in the splined end of the shaft but my drive was down so I could not see into the end of it.

Notice that in the vid, he already had the snap ring off. He never did say whether he had to release tension on the pack, with the allen screw, before he could remove the oring. I can only assume that is what he must have done. If the electric shift era packs did not have the allen screw, then you would for sure need to press the assembly to be able to remove the circlip.

Another thing he did not mention was how to get the proper tension on the pack after re-assembly. Incomplete instructions like that are maddening. They get you part way there and leave you guessing.

 

[Impazteck]

Re: Omc tilt problem

It's my vague recollection that they have to be pressed to be released then pressed to be re-assembled. But I am not absolutely sure. I went out to look at mine to see if there was that allen screw in the splined end of the shaft but my drive was down so I could not see into the end of it.

Notice that in the vid, he already had the snap ring off. He never did say whether he had to release tension on the pack, with the allen screw, before he could remove the oring. I can only assume that is what he must have done. If the electric shift era packs did not have the allen screw, then you would for sure need to press the assembly to be able to remove the circlip.

Another thing he did not mention was how to get the proper tension on the pack after re-assembly. Incomplete instructions like that are maddening. They get you part way there and leave you guessing.

Yes it is maddening, do you think my clutches are my problem? Because everything else spins and every now and than it will hold for a second and than slowly come back down it's very frustrating

 

[Boomyal]

Re: Omc tilt problem

Yes it is maddening, do you think my clutches are my problem? Because everything else spins and every now and than it will hold for a second and than slowly come back down it's very frustrating

I dug out an OMC factory manual from 1973. It clearly shows that the clutch pack has to be compressed to release the circlip. It also makes that point that the clutch discs are moisture sensitive. They do not bother to say what problem will occur when they get wet. They also do no describe how to spot 'worn' or unusable discs other than to look for any corrosion or physical damage. They do say that new clutches must be soaked in 4 cycle oil for 15 minutes before assembly.

Although they do provide a small picture of the components disassembled (like a deck of cards fanned out) they do not give a count of spring plates and clutch pads. The manual also says this:

"after the clutch assembly is installed in the intermediate housing casting and filled with oil, it should be run-in (slipped) by turning it with a torque wrench until a reading of 130-160 ft lbs is obtained. (they have a little spanner tool that goes over the drive gear, and I assume that you should achieve that torque before the gear starts slipping, which they want you to do to RUN IT IN) If torque is not correct, ADD OR REMOVE SHIMS as required"

I am wondering if someone had yousr apart and did not put it back together right. It is also apparent that the tension can be adjusted with the use of SHIMS.

I am also wondering if you can use the later assembly that has the allen screw tension adjustment???? I have a local, long term (decades) OMC guru that I could ask on Monday, I could also ask him if he has a used clutch assembly for a reasonable price.

 

[Impazteck]

Re: Omc tilt problem

That would be great if he has one also does it say where to put the torque wrench to check the torque?

 

[Impazteck]

Re: Omc tilt problem

This whole thing is just getting frstrating

 

[Impazteck]

Re: Omc tilt problem

my fault i just read that again you said there is a special tool that goes over the gear to check torque, is that right?

 

[Boomyal]

Re: Omc tilt problem

That would be great if he has one also does it say where to put the torque wrench to check the torque?

I will call Monday and see if the later clutchpack will work PLUS if he has one and how much he wants for it. I will then give you the information and his name and number. There are few like him left and he just had a mild stroke two weeks ago when he was helping me diagnose the water leak in my lower drive,

You would probably have to improvise something to grab hold of the quadrant drive gear and attach your torquewrench to it. You do not want to bugger up the teeth on that gear. OMC had a little sheetmetal spanner tool that slipped over and grabbed the gear, then a 1/2" drive hole on the other end to put the torque wrench into.

It is really no more frustrating that any other unfamiliar mechanical project you undertake and lest you think any frustration is due to it being an OMC, go over to the Merc Outdrive forum and read a few of the posts. You talk a about a nonsensical pile of loose parts! Just be glad you're not having to go thru something similar on a Merc Outdrive.:facepalm:

 

[Boomyal]

Re: Omc tilt problem

....oh, and btw, I just went and raised my outrive (I am re-installing it after fixing the water intrusion problem). I was able to get a visual up the end of the clutchpack quadrant drive gear shaft. There is no allen screw in there like on the youtube vid. The hole in the end of the shaft is too small anyway. They probably changed that in 1978, when they went to the hydro-mechanical drive, or in 1982 when they went to the full mechanical drive.

 

[Impazteck]

Re: Omc tilt problem

well i really appreciate your help if you could ask him and get back with me tomorrow if you need more info im working on an 77 omc 235 outdrive its and electric shift also once again your help is very much appreciated

 

[Boomyal]

Re: Omc tilt problem

well i really appreciate your help if you could ask him and get back with me tomorrow if you need more info im working on an 77 omc 235 outdrive its and electric shift also once again your help is very much appreciated

I'll be getting back to you later in the day. I have to go out and do a job for most of the morning.

 

[Boomyal]

Re: Omc tilt problem

Impazteck, I spoke to Steve Ryan today. He has lots of individual parts and pieces but no used, assembled clutch assemblies. He did verify that all years are interchangeable. He also stated that all of them needed to be compressed to be disassembled. He also wondered if the circlip on the inboard side of your clutchpack had popped off. He said that would cause symptoms that you described. He volunteered to speak with you and even said you could send him your pack and he would assemble it correctly. What I did not ask him was how he would test the torque break away that was described in the manual or how you could visually discern discs that were unserviceable.

 

[monster91]

Re: Omc tilt problem

Impazteck, I spoke to Steve Ryan today. He has lots of individual parts and pieces but no used, assembled clutch assemblies. He did verify that all years are interchangeable. He also stated that all of them needed to be compressed to be disassembled. He also wondered if the circlip on the inboard side of your clutchpack had popped off. He said that would cause symptoms that you described. He volunteered to speak with you and even said you could send him your pack and he would assemble it correctly. What I did not ask him was how he would test the torque break away that was described in the manual or how you could visually discern discs that were unserviceable.

I need to send him my clutch pack too

 

[Boomyal]

Re: Omc tilt problem

I need to send him my clutch pack too

What's up with yours, monster? Maybe you should start a new thread and state your issues and concerns? You might be able to get them answered so that you head in the right direction.

 

[monster91]

Re: Omc tilt problem

I am very new at the form thing so I need to look into starting a thread.

My issue is the out drive only lifts 4 inches up if I get a buddy to manually assist me it will continue to go up with his help. Once up with help it stays up and will go down by the switch (it seems kind of fast on the descent)

I had it apart 13 times to the point where i know the motor spins the worm gear and the worm gear spins the that brass looking ring that the clutch sits in as long as the clutch and shaft are out of the assembly it works when the clutch goes back into the brass ring I only get 4 inches of lift ?

The only thing I can think of is the clutch but I don't quite understand its purpose due to the extreme gearing ratio.

 

[Boomyal]

Re: Omc tilt problem

The clutch either holds the drive up or it doesn't. If your drive raised 4" and you continue to hear the motor running that would be a different issue. However, if that were the case (where the motor continued to turn with the clutches slipping, the clutch pack would not be able to hold the drive up, in any position.

I would say that you have a drive motor that cannot develop sufficient torque to finish lifting the drive. It takes less torque to move the drive in the first few inches than it does to continue to lift it to the horizontal. Another possibility is that someone installed a cheap aftermarket tilt motor. They are notorious for not developing the proper amount of torque.