OMC upper unit question.. Please help!

[wakeboarder]

When winterizing my boat i was pulling the hoses off the engine while my dad was draining water out of the drive.. he pulled a plug out that he shouldn't have and i do not know what it is .. it is not in the manual or any diagrams.
The bolt he took out is threaded but the hole is not .. we removed water pump and can not seem to find out what was holding it in .. .. No oil or anything in hole... took it to repair shop they could not help .. here is pictures
Thanks in advance!

 

[wakeboarder]

Re: OMC upper unit question.. Please help!

The bolt felt like it was glued in ... the hole is factor ... just want to know what it is and if the was a nut on the back that fell off.

 

[Bondo]

Re: OMC upper unit question.. Please help!

Ayuh,... That's OMC's Evil, Never remove it screw.... It don't do much, but hold back water...
Unfortunately,...
Now you have to drop the lower unit, find the backer nut, Reinstall it..
Then put the lower unit back on....

No,.. You can't run without it, the water going to the motor Won't get there...

Once you get it back together,...
I'd suggest you stake it in place with a punch, then cover it with Epoxy...
That'll save somebody the Hassle you're going through...

 

[wakeboarder]

Re: OMC upper unit question.. Please help!

Thanks... but that it not what i wanted to here...
i guarnetee that when fixed it will be covered with epoxy so there will be no chance of that AGAIN!

 

[Aintjudge]

Re: OMC upper unit question.. Please help!

This is what your looking for inside there...

 

[wakeboarder]

Re: OMC upper unit question.. Please help!

Thanks... got it tore down and found the piece... as soon i get some epoxy this will be a problem no more!

 

[Gary H NC]

Re: OMC upper unit question.. Please help!

Now is the perfect time to grease the u-joints,inspect the gimbal bearing and replaced the bellows if they have not been done in the last 3 to 5 years.
The drive is supposed to be removed yearly and serviced anyway.

OMC used to put a Cobra decal over that screw so this would not happen.

 

[locator229]

Re: OMC upper unit question.. Please help!

can anyone tell me if the flapper comes out of the exhaust tube will if affect the cooling of the engine and can i run the boat without it..thanks tony

 

[Howard Sterndrive]

Re: OMC upper unit question.. Please help!

can anyone tell me if the flapper comes out of the exhaust tube will if affect the cooling of the engine and can i run the boat without it..thanks tony

you should start a new thread for this question.

won't affect cooling if it came right out.

If it's stuck in the downpipe, it will affect cooling and power.

you can run without but there may be additional risk of hydrolocking the engine. depends on hull design so the risk can't really be evaluated except by trial and error.
I know there's a lot of boats running around without them. But locking an engine can destroy it.