OMC Tru-Course Steering

bianchija

Seaman Apprentice
Joined
May 19, 2004
Messages
43
I have a '77 OMC setup and the Tru-Course steering system. Its always worked great for me, but after this winter it appears to be locked up. I can't turn it at all, and the issue appears to exist back at the drive. Do these things normally lock up? Any ideas how to fix this? It seems like it will be fine if I can break it the drive loose as it's just sticking. However, I'm worried I'm going to cause more damage if I try to "break" it loose. Any thoughts?<br /><br />Thanks for the help. <br /><br />Joe
 

KaGee

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Aug 14, 2004
Messages
7,069
Re: OMC Tru-Course Steering

Joe,<br /><br />Most likely it will involve removing the drive to determine where the problem lays. Most likely it's the cable assembly or related. <br /><br />If you remove the drive and the wheel will turn you have your answer.
 

Boomyal

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Aug 16, 2003
Messages
12,072
Re: OMC Tru-Course Steering

Joe, as KaGee said you need to pull the drive for starters. That will eliminate the drive as the culprit. If that does not do it then you need to remove the steering gear and shaft in the intermediate housing and pull out the rear True course drum. There is a grease fitting for the shaft both outside the transom and where the shaft terminates on the inside of the transom. These are often overlooked.<br /><br />Also no one ever tells you to lube the cable itself. Even if the problem turns out not to be the cable I would lube it.<br /><br />The steering had really been stiffining up in my '75. I pulled the rear drum, proped it as high up in the air as it would reach, then began to spray TriFlow down the two cable passages. In your case, being frozen up I would spray as much as it will take, let it sit for a day, then start trying to turn the wheel. <br /><br />If it starts to move, I would have someone slowly turn the wheel while you continued to spray the lube down the track that the cable is retracting into. Once you get to lock, go the opposite way, spraying as the opposing cable retracts into it's housing. Repeat as often as necessary till it free up completly. Then I would do the same thing from the steering wheel end except I did not remove the drum up front. I just stuck the spray nozzle into the cable opening and sprayed while I turned the wheel. It's messy doing the front one in the horizontal position so have rag towels handy.<br /><br />This made night and day difference in the steering effort in my boat.<br /><br />You could actually disassemble the drums, pull out the cable and grease it, but that would be a royal pain in the tushe.
 

WillyBWright

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Dec 29, 2003
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8,200
Re: OMC Tru-Course Steering

Hopefully it's just water in the cable that's frozen. If so, it might free-up when it thaws.
 

Boomyal

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Aug 16, 2003
Messages
12,072
Re: OMC Tru-Course Steering

Originally posted by WillyBWright:<br /> Hopefully it's just water in the cable that's frozen. If so, it might free-up when it thaws.
No freeze out here in the PNW, WillyB. We be having summer early. Must be those evil conservatives and their greed induced global warming. :D
 

KaGee

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Aug 14, 2004
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7,069
Re: OMC Tru-Course Steering

Send some warming over here will ya....dog gone it anyway!
 

marlinempress

Petty Officer 3rd Class
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Apr 25, 2004
Messages
84
Re: OMC Tru-Course Steering

I've had similar problems with my '85 omc 800. Except it really had nothing to do with the steering at all, it was because the drive was getting torn up inside. Little pieces would go up to the top of the upper gearcase where the worm and crescent gear for the steering is and get jammed in the teeth, thus preventing it's movement. Whatever you do, DON'T FORCE IT! I tried that beautifully flawless approach and it made the problem way worse by breaking the big 'ol bracket attached to the gearbox inside the transom that the power steering ram goes to. That was a real bugger to try and get welded back together. I eventually got around to fixing the drive getting torn apart from the inside. :)
 

bianchija

Seaman Apprentice
Joined
May 19, 2004
Messages
43
Re: OMC Tru-Course Steering

Thanks for all the advice.<br /><br />What's weird is that the steering was so easy before. I could turn the wheel in either direction with my pinky finger. Now it has no movement. <br /><br />I'll start by pulling the drive as you all recomended and getting some TriFlow sprayed into the cable passages. I'm not sure where the rear drum is located but my repair manual should show me, right? I'll give it a shot this weekend and let you all know.<br /><br />Thanks again.
 

Boomyal

Supreme Mariner
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Aug 16, 2003
Messages
12,072
Re: OMC Tru-Course Steering

Ya don't have to disconnect the shift cable to pull the drive Joe. Just be sure you have someway to prop the drive up when you disconnect it. Don't put a lot of tension on the shift cable.
 

Boomyal

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Re: OMC Tru-Course Steering

^ well, what'd it turn out to be Joe?
 

KaGee

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Re: OMC Tru-Course Steering

Originally posted by Boomyal:<br /> ^ well, what'd it turn out to be Joe?
Enquiring minds want to know!
 

bianchija

Seaman Apprentice
Joined
May 19, 2004
Messages
43
Re: OMC Tru-Course Steering

Worked on it all day yesterday and came out great. I'm glad I read about the shift cable from Boomyal. I wasn't sure what the cable was for at first. I propped the drive up and was good to go. I cleaned everything with TriFlow, and then reassembled. It works great...better than ever before. <br /><br />Great advice everyone. Thanks so much for the help. Now I just have to wait for this weather to pass so I can get out there.
 

Boomyal

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Aug 16, 2003
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Re: OMC Tru-Course Steering

Originally posted by JoeAB:<br /> Worked on it all day yesterday and came out great. I'm glad I read about the shift cable from Boomyal. I wasn't sure what the cable was for at first. I propped the drive up and was good to go. I cleaned everything with TriFlow, and then reassembled. It works great...better than ever before. <br /><br />Great advice everyone. Thanks so much for the help. Now I just have to wait for this weather to pass so I can get out there.
Glad to hear Joe but a little more detail please. What exactly did you remove, clean and oil?
 

bianchija

Seaman Apprentice
Joined
May 19, 2004
Messages
43
Re: OMC Tru-Course Steering

I pulled the drive. I found the two grease fittings that were mentioned above. I got some more grease pumped in them. I also cleaned all the components on the drive. I didn't get too far into the itermediate housing assembly. I reached down and sprayed the hell out of it with TriFlow. I let that sit for about 3 hours. I put everything back together, and other than a little hesitation at first it freed right up and spins with ease.
 

GA_Boater

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May 24, 2011
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49,038
Hoping someone can help me out here, I know it's an old thread but maybe it will pop up on someone's radar.

I have a similar problem, but I can turn the motor half way before it binds up. I'm thinking I need to remove the drive and grease. I know I may come off as and idiot but what exactly is the drive? Are you talking about what's on the end of the cable? How do I go about removing this from the sterndrive end of the line?

Thanks, appreciate anyone that can help!!

FishinFool88

What are you working on? This thread is for an OMC steering issue in the Mercruiser section - Makes it hard to help.

Tell us so it can be moved to the right section as your own thread instead of here in a 13 year old, inactive thread.
 
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