OMC Cobra Help (cable adjustments)

Bwillson18

Recruit
Joined
Sep 21, 2026
Messages
1
Hey, I just recently purchased a 1994 seaswirl striper 212. has a 5.0L Ford V8 and an OMC cobra outdrive. Had to do some work on the engine (new fuel pump, carb..etc.) but it is running great now. I am new to outdrives though and have been having some trouble with this one.
Just to fill you in, once I got the engine running I was under the impression that the boat should work (from previous owner, said he had no problems with the drive last time he used it). I got the boat in the water and it would shift into reverse, but not into forward. I fiddle with the cable adjustments for a little before feeling pretty overwhelmed and giving up.
I then proceeded into a deep dive all about cobra outdrives on these forums and youtube. I found The service manuals and a lot of good extra info in all my digging. I ended up pulling off the outdrive changing the oil and water pump while It was out and replacing all the basic gaskets (basically did everything except pull the lower off and rebuild it.). I put it back on and tried following the instructions I had found and read over several times for adjusting the cables and nothing really worked. it seemed the cable only had enough room to reach one gear; when I set it to go nicely into forward gear, it then wouldn't have enough travel/ swing to reach the point to get into reverse gear, and same problem when I switched it. I ended up taking the drive back off and setting the cable to neutral then measuring the "throw" of the arm in the bell crank and then adjusting the shift rod in the outdrive itself for it all to line up (it was still close to the 7-3/16 number or whatever it is that is mentioned in the manual, but was a little less). I then put it all back together again and everything seemed to be clicking into gear a bit better. I then put the muffs on and fired her up and everything seemed great.
today I took it to the water for the first time, and now my problem is it'll switch in to gear no problem but won't switch out. I tried adjusting the interupter switch but to no avail.
It seems that when the interupter switch is triggered just right then it can shift out of gear.
But heres my problem, when I trigger the switch it kills the engine, every time.

My questions:
1. do I need a new interupter switch? is this a common failure?
2. my engine is idling around 800 which i know is a little high (still need to fine tune the new carb), but is this enough to cause this problem.
3. I can't seem to find ANY info on my specific cable bracket, I will post a picture of it, but in the manual it says "if you have this bracket see service bulletin #4022 for cable adjustment" but in some other info i found on this forum, someone got a letter from the manufacture that said "we no longer include #4022 because it is obsolete" sooooo WTF. I literaly can't find a single scrap of info on how to adjust my specific style of bracket.
4. How can I find the specific model number of my outdrive? I've looked all over the engine and outdrive and cant find anything.

Also I should mention, in the picture the nut that is threaded on the cable before the trunion is backed all the way off, I did find a very random obscure facebook post about someone having similar troubles, and an experienced person commented to push that nut all the way up against the trunion, that did help with the shifting a lot (very glad to have found that info) but didn't solve everything. just wanted to point that out before someone sees the pic and suggests that.

Any help is greatly appreciated. I don't need to be pointed toward the service manual at this point, just a clear answer would be nice, thanks.
 

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Lou C

Supreme Mariner
Joined
Nov 10, 2002
Messages
14,397
Ok I have had one of these for over 20 years and have done the adjustments myself, mine is a bit different, but I'll try to cover the basics first:
first thing, the Cobra shift cable should not have more than 2.5 lbs of drag in either direction, with it disconnected at both ends, more than that and you'll have troubles
That shift rod adjustment has to be right on the money, or else your other adjustments will be off
800 rpm is WAY too high, at that speed the ESA might not even be able to reduce the idle enough for the drive to come out of gear. I have mine idling at 600 rpm in gear in the water. If I trigger the ESA lever it drops the idle to 450, it is in good enough tune that it will not stall and the drive will easily go into neutral.
Your set up has a different adjustment for the remote control cable than mine does but this requires attention. Keep in mind that this is a 2 cable system, the order of adjustments is as follows:
1) shift rod adjustment
2) transom shift cable adjustment
3) remote control cable adjustment
even if you get #1 and #2 right, if #3 is off you won't get equal throw on either side of neutral for FWD and REV

Where you're at now, I would:
tune the engine so you can get it idling slow enough for ESA to work and the engine to not stall
Then see if the drive goes into gear (no grinding into gear that suggests a stiff cable and/or not enough throw in that direction) and stays in gear under power (no clunk/jumping out of gear, also caused by a stiff cable and/or not enough throw in that direction.
and if it will go into neutral easily when in the water (ESA must be functioning correctly). When this is working right if you watch the tach when shifting from in-gear to neutral, you will see the tach needle drop slightly and then the drive will slide into neutral and the tach needle will come back up to your idle setting.
BTW, use an accurate tach to set your idle, dashboard tachs are often off by 100-150 rpm.

I would HIGHLY recommend that you find an OEM OMC shop manual for your engine/drive combination. Forget about aftermarket ones.

When it's right the Cobra drive will shift with a nice THUNK into gear and easily come out of gear into neutral. Mine shifts with 2 finger pressure on the control.
 

Lou C

Supreme Mariner
Joined
Nov 10, 2002
Messages
14,397
PS the model # is usually on the engine, a light grey sticker on either the valve cover or the thermostat housing.
While your boat may be a 94 the engine/drive package must be a 93 because the 94 and up drives were totally different, that was the joint venture drive made with Volvo, and is the same as a Volvo SX drive. You have a Ford 5.0 and what looks like a Holley 4bbl carb, correct?
 
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