OMC low profile stringer steering

[badcrank 77]

Hi Everyone.

I have a 1977 Sea Ray cuddy cabin 21 foot I/O with a 351 ford and OMC low profile sterndrive. Steering has been very smooth. Overhauled the sterndrive this summer, replaced the thrust washer that goes between the W/P and swivel housing. Also installed the rubber O ring that goes on the W/P housing and set's down on the exhaust housing. Both were missing before I done this. Now the steering is hard when in the water, but on dry land turn's easy. I'm seeking an answer as to why, and also can I remove that large O ring since is was not there before without any ill issues? Thinking that may be binding and causing the hard steering now.

badcrank 7

 

[kenny nunez]

There is a “O” ring that goes around the outer perimeter of the water pump housing that is to aid in keeping exhaust gasses from entering the incoming cooling water. You may have put the plastic thrust washer upside down.
The large sealing ring that seals the lower section of the upper housing to the exhaust housing should not cause a bind.
Does the bind happen only when the boat is on plane or in neutral ?
If you installed the worm gear with the thrust bearings not sandwiched between the hardend thrust washers that would cause the problem.
You will have to drop the lower after disconnecting the shift wire.
To inspect the bearings. remove the top cover, then the 6 Phillips head screws, pry the gear housing cover off and check that the bearings are installed correctly. If the bearings are installed incorrectly just remove the upper from the boat and r&r the worm and bearings.
Be sure to center the helm and the drive to also be centered before reinstalling to get full l-r sterinng.
I cannot think of anything else that would cause the problem you are describing.

 

[froggy1150]

I had a kinda similar problem. I did a full rebuild on my drive including all bearings,races and all the drive shafts. Put it all together and would not turn. There are (atleast on mine) shims in the very top cap where the center post is. I removed .005 shim and freed up. Not your problem but it does show how if you are ever so slightly off with something......

 

[badcrank 77]

Thank you for the responses, I put in the thrust washer with beveled side down just like the manual specifies. The bind is worse running at plane and 3,000 RPM. The bind is whether I'm in neutral or going even slow.
I never took out the worm gear assembly, for it was working fine before, so I never touch it. I have full swing on the steering for I did center the helm, by rotating the steering wheel then dividing by 2 and bringing back that many turns, then installing the gear with the drive centered that work's off the worm gear. On the shim's on the top, that may be an issue, for when it turned before so freely, there was no thrust washer installed. It was when I rebuilt everything with new W/P & bearing's etc, that's when I noticed there was no thrust washer, after installing one, I still had the same amount of shims in that top cover that goes down over the worm gear etc.

 

[kenny nunez]

Was there a spring with 2 washers under the center of the top cover? They could have gotten sideways when you installed the cover. If there are too many shims on the center post of the upper gear housing that could also cause a bind. I cannot think of any thing else that causes the problem you are experiencing.

 

[southkogs]

Can you grease the swivel (should be a point on the front of the drive)?

 

[froggy1150]

 

[froggy1150]

So those 2 little shims went on the end of cap and after rebuild it had to remove one

 

[Redrig]

So those 2 little shims went on the end of cap and after rebuild it had to remove one

If you don't have it shimmed right , when you cranked down the bolts on the top cap , you binded up the steering.

 

[froggy1150]

Yes. All new shafts, bearings etc.... just about everything. Would work until I torqued cap. If it was slightly loose it would operate. Removed 1 of 2 shims and been good ever since. 3 maybe 4 seasons so far with 1 water pump change so far

 

[badcrank 77]

I all, this is all good reading. and I believe as Froggy so states, I never had that thrust washer down on the swivel housing. And there was no issue with steering. Now that I have installed the thrust washer, I never removed any shim's at the top. And for sure I believe that is what is binding the turning.
The season is over for me now here in Wyoming. And I have removed the stern drive and have it in my shop. And with the cover (steering gear) removed it rotate's very smoothly. And as stated when I tighten down that cover it was binding with all those shims in there. Now I'm sure someone before me never installed that thrust washer, so they shimmed it on top to compensate. It will be next season to try it. But thank everyone and Froggy for this excellent advice, for I believed problem solved.