OMC 400/800 Sterndrive Tilt

[qainspector]

Need some help, I have a 1975 or 1976 OMC Outdrvie that has the typical tilt problem, i have replaced the tilt motor and now all that happens is the motor turns / spins, I can not get the worm gear out to see if it is damaged and from all the diagrams I can find they all show a plate with 3 screws on the front, mine doesn't have the plate but instead has a split ring holding a what looks like a copper plug of some sort. How do I remove the worm gear.

Thanks Bryan

 

[Starboardputz]

Re: OMC 400/800 Sterndrive Tilt

Mine has the plate covering the worm gear, i believe yours has a snap ring holding the plug in place, remove the ring and gently move the drive and you should be able to remove the plug. Have you checked the tilt clutch and greesed the fittings behind the rubber stoppers?

 

[WizeOne]

Re: OMC 400/800 Sterndrive Tilt

Sounds like you may have lost one of the two (or both) keys in the hammer blow coupler. They can come out of the coupler.

 

[qainspector]

Re: OMC 400/800 Sterndrive Tilt

I am not sure who the JAC& ***** is who developed this outdrive but he ought to be shot. The last thing I wan't to do is pull the tilt motor again. Thank you both for the info and pics.
Still not sure how to remove the worm gear. I tried attaching a pic.

 

[WizeOne]

Re: OMC 400/800 Sterndrive Tilt

I am not sure who the JAC& ***** is who developed this outdrive but he ought to be shot.

Au contraire! Take some time and read some of the repair issues for the Rube Goldberg Black Anchors. The truth of the matter is that they are all a PIA!

I cannot see, in your diagram, which piece you are speaking of, but you should check your hammer blow coupler and the notch on the top end of the sector shaft.

 

[Borgesfamily]

Re: OMC 400/800 Sterndrive Tilt

My freand has the "snap ring " type and the only way he could get it out was to drill the very center of the worm gear cover. The boat shop said to just replace that cover. when he did drill the small holehe was able to get the snap ring off easly. But the part you should look at is the shaft holding the worm gear. Mine did that sound last week. I puld the worm gear out and the shaft part that goes into the hammer blow cup. was brock. I had replace the tilt motor about a week befor this part broke.
Good luck.

 

[qainspector]

Re: OMC 400/800 Sterndrive Tilt

I was kind of afraid I might have to drill a hole in the cover. I am tempted to use it the way it is for weekend fishing.
Will keep you all informed as to the out come, and or easier ways to pull the drive motor, (HAHAHAHA).

 

[rs2k]

Re: OMC 400/800 Sterndrive Tilt

It's a lot easier to pull the boot off and then get the tilt motor from the back of the boat. You only need to get the boot out of the way, you don't have to slide it all the way off the drive. I found this out the hard way. It took me about an hour to remove both tilt motors on my twin engine boat but only 5 minutes to reinstall them with the boot off.

The boot was surprisingly easy to take off, just make sure you seal it correctly when you put it back in.

Your problem is most likely due to the hammer coupler, but it could also be a slipping clutch. One of the tilt clutch snap rings let go on the starboard engine on my boat which caused the clutch to loose its tension.

 

[qainspector]

Re: OMC 400/800 Sterndrive Tilt

I am going to try removing the boot to access the tilt motor. Will also post pictures on how to perform this surgery.
Thanks everyone.

 

[rs2k]

Re: OMC 400/800 Sterndrive Tilt

Very good, it's pretty easy.

First, if you have an electric screw driver, you remove the 22 screws.
If you don't have an electric screw driver, you remove the 22,000 screws.

Second, separate the edge of the boot from the transom with a putty knife if necessary.

Third, lubricate the worm screw drive on the giant hose clamp and unscrew it.

Pull the boot a little ways oust and now you can access the tilt motor VERY easily.

If you have selectrim then make sure you put the out drive all the way down to make working on it a bit easier.

You might be able access the tilt motor without unscrewing the giant hose clamp. That will save a little time.

Be careful not to tear or puncture the boot. Those things cost about $100.

 

[firenspurs]

Re: OMC 400/800 Sterndrive Tilt

Mine has the plate covering the worm gear, i believe yours has a snap ring holding the plug in place, remove the ring and gently move the drive and you should be able to remove the plug. Have you checked the tilt clutch and greesed the fittings behind the rubber stoppers?

Do you know what the plug with the triangle keeper is called mine is in the bottom of a lake and I am trying to find a new one

 

[Howard Sterndrive]

Re: OMC 400/800 Sterndrive Tilt

shop.evinrude.com - has all the parts diagrams, pricing and availability for OMC drives back to 1968

 

[jcrand]

Re: OMC 400/800 Sterndrive Tilt

I took a month or so to finish replacing a broken tilt/worm shaft. Removed the boot and that made it easy. I have a stringer 800 series but now cant get the clutch back together. I have a snap ring holding 3 cupped washer type plates. Which way do they go on? Does the rim of the cup sit on the clutch plates or the center bowl of the washer on the plates / cupped in or cupped out? When placed with the rim of the cup on the plates, the snap ring won't go on, no room. It almost seems like the clutch plates have swollen. I ruined the snap ring, where can I get one. What size?
Thanks, JCRand

 

[rs2k]

Re: OMC 400/800 Sterndrive Tilt

This is actually a pretty simple job, I hope I don't make it sound too dificult:

You need to make a tool by hack sawing or dremeling a metal pipe. I used a steel exhaust reducer couple I picked up from autozone and a dremel tool. I'll take a photo tomorrow if I can find it.

You then have to use tool with a press to compress the clutch pack to allow the snap ring to go on. I didn't have a press that was big enough to compress the clutches do I used my truck and a hydraulic jack instead. I will try to find the part in the OMC manual that tells you how to make and use the special tool.

Let those clutches soak in WD40 before you put them back together for good. Also, DO NOT refill the clutch cavity with motor oil. Do it the right way and fill the whole thing up with grease.... COMPLETELY full of grease.... A very messy but very worthwhile job. I don't understand why OMC didn't just do that in the first place.

Put the concave side of the three large spring washers down. In other words you want the hollow side down. You want the outer edges of the washers pointing towards the clutches, not away from them.

I'm not sure about trying to find another snap ring. I'd try autozone. I almost lost one of mine when it flew off and into the front lawn. I was lucky to find it again.

 

[rs2k]

Re: OMC 400/800 Sterndrive Tilt

You should verify this first, but I think this is where you can find your snap ring:

http://www.go2marine.com/product.do?no=90462F


Retaining Ring, 309844
Part# 90462 | Mfr. O.M.C. | Mfr# 309844

* Replacement retaining ring for the OMC tilt clutch system






ID didn't get mine on correctly the first time I took this clutch pack apart. I put the outdrive in reverse and POP, the outdrive went up. I had to "go out back" and stand on the outdrive to get it back down.

Not something you want to do at this time of year in most areas.

 

[bergerandfries]

Re: OMC 400/800 Sterndrive Tilt

I had multiple problems that I'm still working through. I had solenoid problems and found a low cost source for a tilt motor, so I KNOW that I'm AWESOME up to the hammer coupling, which I inspected and it looks great. That stern drive will drop with a tap of the switch. It will come up about two inches and quit on the up, though.

So my problem is now the worm gear, the clutch pack or somewhere in between. My plan is:
1) Get the cover off the clutch pack and inspect. In the spring, I changed the "oil" in the clutch and it came out a gooey, watery mess. So much water that it came out clear and chunks of "oil" came out. I refilled with SAE30 and prayed. Guess that I need to take that cover off and hit with a heavy duty de-greaser to get the chunks out and clean up the clutch.
2) Once clean, try to run the tilt up.
3) If it goes up, get the trailer tongue up high (it already is, I store it that way), and get a jack under the stern drive (anyone got a safe suggestion on how to do this?) I was thinking a 2x10 under the drive, with a jackstand/bottle jack/jackstand under the 2x10. That way if there's a problem with the bottle jack, I don't loose a hand or damage the drive. Disassemble everything, replace ALL the seals with Sierra 18-8360 CLUTCH HOUSING SEAL KIT. Anyone have a replacement for the OMC seal installer part # 910585, or have a trick to install the clutch shaft seals?
4) Refill this thing with grease as mentioned above, or SAE30

If I wanted to replace the clutch pack, where can I find one? I'm guessing it's gotta be $250-300+

 

[WizeOne]

Re: OMC 400/800 Sterndrive Tilt

Does the motor quit turning on the uptick? or does it just quit?

Have you had the motor apart and checked the brushes, the commutator and for any goo in it.

 

[bergerandfries]

Re: OMC 400/800 Sterndrive Tilt

Does the motor quit turning on the uptick? or does it just quit?

Have you had the motor apart and checked the brushes, the commutator and for any goo in it.

Motor does not quit on the uptick. Also, it is a new motor, and does the same thing as the old motor. Hammer coupling looks great. Tilt goes down without any problem. 12V confirmed also going into the blue lead on the motor wiring harness. Up solenoid also clicks when switch applied. I know the motor is getting good voltage, is turning, and have duplicated it with two different motors.