OMC Sterndrive Identification

[ggrace boater]

Hey,

I have what I think is a 1979 Century boat that has a 351 in it. I am needing to identify my outdrive so I can look up part numbers. The Model No. is 982436 and the Serial No. is W217061. I need to figure out the exart part numbers for upper gear set, water pump, seals, bearings, etc., but I haven't been able to find any schematics using that model number.

Thanks,

Garrett Grace

 

[Levinz11]

Re: OMC Sterndrive Identification

Sounds like an OMC Stringer 800. Try searching that until, one of the gurus show up.

 

[southkogs]

Re: OMC Sterndrive Identification

Go to THIS site, click on parts, select "STERN DRIVE" in the drop down and navigate to your engine. That'll get you most things you need.

That said, Levinz is right that you're most likely into a Stringer 800 and a bit of a "history project." The 982436 number if off the engine itself isn't coming up in the lists that I looked at (they all started 99...), the serial number and model number on old OMCs are almost worthless. Post some pictures and we can help you confirm whatcha' got.

 

[ggrace boater]

Re: OMC Sterndrive Identification

Thanks alot, haven't had time to clean parts yet to see if case is still good, bearing went and took gear set, 37 years old living on low income working on getting a masters degree right now, my income level puts me more along the lines of a good set of old used gears. Hoping maybe someone has some for me.

 

[Howard Sterndrive]

Re: OMC Sterndrive Identification

it's an 800 series hydromechanical shift. Did the shift cable survive disassembly? It seems to be disconnected from the lower (?)
You need lower gears?

 

[ggrace boater]

Re: OMC Sterndrive Identification

Thank you, I need a set of gears. The lower unit is ok as far as I know. The shift cable is nothing nice but I want to reuse it unless you have one cheap. I need a set of used gears if you have some. I also need ball gears, and I would buy used ball gears too, if they have 70% or more left. Give me some prices please. I will be ready to buy as soon as Monday. I have to clean the housing and make sure it isn't too damaged before I buy parts. I am having to buy both the tilt and trim motors and a new boot, so it is adding up. I got a great deal on a remanufactured 351 marine engine with very low hours that was removed prematurely. I allready have it in and set up right.

I had problems with the shift cable and disconnected it from the foot thinking I could pull it out that way. After I realized that wasn't gonna happen I went back to plan A and got it to slide through the intermediate housing. I did tear the rubber some but I took my knife and beveled it real good where it would come on through.

 

[southkogs]

Re: OMC Sterndrive Identification

... I am having to buy both the tilt and trim motors...

ouch ... any chance you can just have 'em rebuilt?

 

[Howard Sterndrive]

Re: OMC Sterndrive Identification

buying and selling on the forums is not really allowed. ebay a good source.

The shift cable is no longer available from BRP which is why I was asking - coulda been a dream changer. marineengine.com has two remaining for $700 each.
That lower unit is rare so look after that shift cable - it may not be available ever again in the future if it gets damaged so treat it gingerly.

 

[ggrace boater]

Re: OMC Sterndrive Identification

Maybe so, I cleaned them and had them working but they weren't good enough. They have a wind up throw away rear ball socket bushing design with a non removable clip that keeps you from being able to take it apart. You can't even get to the non-removable clip to remove it, and it holds the ball shaped end of the armature shaft in the rear plate of the motor. One of the non removable clips was rusted out completely and the clip provides stability for the end of the armature shaft. It just has too much slop in the brushes, and doesn't work well. The other motor, the brushes have worn real deep into the armature. I can get them both brand new for 200 on ebay. I already purshased the one for the outdrive for 60 new off ebay.

ouch ... any chance you can just have 'em
rebuilt?

 

[ggrace boater]

Re: OMC Sterndrive Identification

Thanks Howard,

I will guard it with my life. I damaged the rubber coating for about 6 inches, but its the part of the cable that will be inside the boat and I was planning to put some grease on it and slide a shrink tube up on it and shrink it. The bad part of the cable though, is when I would put it in reverse, it would get a little slack in the cable that slacks in. I can tell it is a little damaged there by the cable stop. I don't know if it is from getting slack or if it stretched a little right there by the cable stop. All the meat of the cable is still there though so I was thinking if it is a little stretched right there I might fabricate a cable stop the right diameter and snip the one thats molded ontu it off. I won't do any snipping until I fully understand how the cable set up works, so I dont make any boo boo's. I haven't looked at it enough to understand it yet. I am new to outdrives.

 

[ggrace boater]

Re: OMC Sterndrive Identification

I can see why they charge so much for a rebuilt unit now. I have it more apart and have a few actual part numbers.

981884 - On the upper gear case shaft the ball gear splines ontu.
909753 - On the water pump shaft

That's the only definite numbers I have so far. I don't like the wear on the water impeller shaft or the shaft it splines with so that will be more money. If anybody has the ability to hook me up with a deal on used gears or shafts with minimal wear, please do it. My email is (EDIT use PM) if you would rather use that.

 

[ggrace boater]

Re: OMC Sterndrive Identification

Can I use a non centering cone pinion gear on a 909121 shaft that had a centering cone gear on it? I'm trying to save a couple hundred on parts.

 

[ggrace boater]

Re: OMC Sterndrive Identification

Can a starter and alternator shop rebuild the electric trim/tilt (whichever it's called) motor on the engine? The brushes are worn fairly deep into the armature. The price is 150 for a new one. If I could save 100 bucks there I would sure do it. This whole project is expensive to me.

 

[ggrace boater]

Re: OMC Sterndrive Identification

I guess I'm gonna buy a proven used set. I hear the the new non OMC sets aren't very good. I guess I will scratch the non centering cone gear idea.

 

[southkogs]

Re: OMC Sterndrive Identification

Can a starter and alternator shop rebuild the electric trim/tilt (whichever it's called) motor on the engine? The brushes are worn fairly deep into the armature. The price is 150 for a new one. If I could save 100 bucks there I would sure do it. This whole project is expensive to me.

I was able to have mine done at an autoparts shop. The guy who I used understood marine units vs. auto. Cost me about $45 for each motor.

 

[ggrace boater]

Re: OMC Sterndrive Identification

Thanks Southkogs, I will call some local places and see what they say. Hopefully I can find someone that rebuilds marine motors also.

 

[ggrace boater]

Re: OMC Sterndrive Identification

Getting the small horizontal shaft bearing race out of the case was real hard with a slide hammer and took a little while. I saw the video about drilling and driving out with a punch after I had it removed. Then I noticed it appears the race spun a little in the case when the bearing burnt up. It must have barely spun, because I dont think the case is hurt. Besides what I think, I bought a freshwater outdrive from Illinois for 525 including shipping. It comes with a foot and a shift cable I can sell. The ball gear on it has no wear. I'm thinking I will replace the small horizontal shaft pinion bearing because I hear they burn up in all of them. I will check the water pump too and probably at least replace the impeller. Wish me luck!!!!

 

[Howard Sterndrive]

Re: OMC Sterndrive Identification

If the ball gears are original and not worn on a 45 degree angle, don't worry about the pinion bearing. That rear brg fails because of radial load when folks run with the drive tilted.
Changing the bearing requires proper preloading which requires special tooling.

 

[ggrace boater]

Re: OMC Sterndrive Identification

If the ball gears are original and not worn on a 45 degree angle, don't worry about the pinion bearing. That rear brg fails because of radial load when folks run with the drive tilted.
Changing the bearing requires proper preloading which requires special tooling.[/QUOT

Ok, I still want to look at the vertical shaft splines and put a water pump impeller. I worry about the old foot too, and am thinking the only way to be sure it isn't worn to the point where it is fixing to fail is to rebuild it. If the foot feels good, looks good, had good looking oil, no shavings or steel parts. Do you think maybe I should just give it a try? I just dont want to break down.

 

[Howard Sterndrive]

Re: OMC Sterndrive Identification

pressure and vacuum test both upper and lower

always service the water pump impeller on any used drive