OMC shift cable ?

surplusman

Seaman Apprentice
Joined
Feb 11, 2005
Messages
46
Ok, not trying to beat a dead horse here, I have used the search function but still have a question. <br /><br />88 OMC Cobra 4.3L <br />I have replaced the transom shift cable with the proper red one. I installed initially without ALL the info to do so, but it wasnt bad. Ran a couple of times, still not the way it should be. Along the way found the info at Stuart Hastings website. So, using his info, I redid the install and made all the adjustments. Now its worse than ever, almost not useable. I went thru the entire process two more times, all with poor results. :mad: :mad: <br /><br />Now mind you this boat was shifting ok to start with, but I decided to make it better for fear of tearing gears up. Well no chance of that now, cause it wont work at all now. I then began to suspect the remote cable going to the shift box. I yanked it out and inspected it, it should probably be replaced, but looked servicable enough to do the job. Whats most puzzling is the difference between the the state it was in, and is in now. I have obviously done something wrong, but is there an underlying problem preventing mefrom getting this right. Maybe I was just lucky the first time. Also there was no water time in between all this. All of this happened within the confines of my shop. <br /><br />I became very frustrasted to the point of throwing tools and pondering pushing the boat into the driveway and lighting fire to it. So with the remote cable on the shop floor, everything else intact, I walked out and have not touched it since. I re-read all the instructions 10 times over, but cannot find what I missed. So while I am still in a calm and rational state of mind, here are the questions...<br /><br />How to determine if in fact the problem lies in the remote cable?<br /><br />Could the problem be that the clutch dog is worn?? If so, how to determine<br /><br />Is there some commonly overlooked item that I perhaps, well.... overlooked.<br /><br />On the transom shift cable there is a brass trunnion. How in the world do you determine where that gets placed, because once the cable is set at the bellcrank, its lenght stays the same but that trunnion can be moved which I have found to have an impact on the shift process.<br /><br />The biggest problem that I am facing is the no matter what the adjustment, it want to shift into gear halfway thru the shift instead of while inside the initial ESA part of the shift (if that makes sense) Then I was able to get it shift quickly and efortlessly forward, but then would not go into reverse. <br /><br />PS. As a side note.....I can now pull, split, make change, bolt halves together, replace outdrive in about 15 minutes. I guess learning on your own does have its advantages. Add in changeing the commonly worn seals and o-rings, and Im still under half hour. :p
 

Don S

Honorary Moderator Emeritus
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Aug 31, 2004
Messages
62,321
Re: OMC shift cable ?

The ESA system does absolutly nothing to do with puting the drive in gear. That is cable adjustment alone. The ONLY time the ESA system even comes into use is when there is a load (from being in the water) on the prop, and the drive is being taken out of gear. It's just to make the engine hesitate enough the the reverse cut shift dogs will release without mega-brute force on the shifter......That kills the shift dogs and gears.<br />Stop reading the instructions and contemplateing them, just get the instructions start from step 1 and while at the boat actually DO each and every step again. Do not skip one, do not miss one and recheck each one after you do it. It will work if all is done correctly.
 

surplusman

Seaman Apprentice
Joined
Feb 11, 2005
Messages
46
Re: OMC shift cable ?

I understand the hows and whys of the ESA. I probably just used a bad choice of words. What I was getting at was instead of shifting into gear quickly, it was already halfway to full throttle before the clutch began to engage. I was doimg this with a friend and the engine was NOT running, so no damage.
 

marinemech

Petty Officer 1st Class
Joined
Aug 12, 2004
Messages
250
Re: OMC shift cable ?

the brass trunion is used to adjust shift read instructions again
 

Don S

Honorary Moderator Emeritus
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Messages
62,321
Re: OMC shift cable ?

Ahhhh, now I understand. Your problem is in the shifter/throttle controller. It should be putting the shifter all the way in gear before moving the throttle cable. If you had it apart, you may have put it back together incorrectly, or you have the cables adjustment way off.<br />There are only about a zillion different kinds of controllers and they all are designed a little different. So it's really hard to tell you how to adjust it.
 

surplusman

Seaman Apprentice
Joined
Feb 11, 2005
Messages
46
Re: OMC shift cable ?

OK, then I am going to go ahead and replace the remote cable since its already out, then start over. <br />I must have the cable adjustment way out, because tearing into the shifter itself was the last thing I did. For what its worth, I am working with the stock shifter from omc. Its got the unlock tab underneath with the trim on the thumb side (I know.... that about 95% of the shifters out there) one other note is that when in neutral, the shifter has enough play in it to actuate the esa before it even moves a cable.<br /><br />Do all shifters have some play in them, or is tighter better??<br /><br />I will report the outcome later. <br /><br />thanks
 

surplusman

Seaman Apprentice
Joined
Feb 11, 2005
Messages
46
Re: OMC shift cable ?

Just an update for those intersted. I replaced both the remote shifte cable and the throttle cable. When I pulled them, I was checking for the length, and found they were both dated 1988. I put the new ones in and readjusted them, and all seems good. One other question, <br /><br />I get just a few audible clunks, then shifts in ok. No grinding, just a few klunks. How many clunks is normal? <br /><br />Also, I found the Teleflex 479 series cables, one 11 feet, and the other 12, for abut $15 each brand new!! What a steal. If anyone is interested in where I got them, e-mail me.<br /><br /><br />EDIT<br /> surplusman@comcast.net
 

rabidfish

Senior Chief Petty Officer
Joined
Oct 3, 2000
Messages
788
Re: OMC shift cable ?

If you forget about the cable from the control box... completely remove it. Can you shift it properly by hand using the shift bracket?
 

surplusman

Seaman Apprentice
Joined
Feb 11, 2005
Messages
46
Re: OMC shift cable ?

About the same rabidfish. Sometimes one or two. Goes right in though.
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: OMC shift cable ?

Those drives go into gear very similar to the Merc Alpha drives, and depending on how quick you shift it, you may get one or 2 clucks, especially out of the water. You also need to have your idle rpm down around 700 rpm when in gear. Any higher and it's going to ratchet too many times and be hard on the drive.<br />When you put the lever in gear, just do it with authority, don't dawdle around and let it ratchet. But you also don't have to SPEED shift it.<br />If idle is correct and your are putting it in gear "with authority" and you are getting only one clunk and occasionally 2 then you are fine.<br />Go put it in the water and see how it does shifting from fwd to neutral then to rev, and back to neutral. Should be smooth as silk with out the engine dying or hard shifting.
 

surplusman

Seaman Apprentice
Joined
Feb 11, 2005
Messages
46
Re: OMC shift cable ?

Well, everything on the boat is ready for the water. As soon as I get the chance, Its going to get wet. Ill post results later. thanks all for your help.
 
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