Help!!! parts fell out

[Phoenyix]

I had to drop my lower unit to replace the shift cable. I separated the lower from the upper unit and 2 pieces just fell out. both pieces are flat thin metal about 1/8 inch thick. I didn't think to take a photo of them before I left where I'm working on the boat so I did a rough drawing of them. I have a Alpha 1 Gen 1 outdrive. part 1 is about 2in long 1/4 wide and part 2 is a thin plate with holes in it about 2in in diameter.

NOTE: the holes in part 2 are not exact. I don't remember how many holes there are and their location in the plate.

I have checked this site http://www.sterndrive.info/alpha-one...ing_upper.html and don't see the parts anywhere in the upper or lower unit drawings

[Zackman]

These look like they may be the exhaust flappers valves? They're suppose to be in the upper section of the Y Pipe of the exhaust. Look at the parts catalog for the flapper and see if these could be those.

[Phoenyix]

I didn't know that I had exhaust flappers. I have a single exhaust on a mercruiser 3.0L and the exhaust goes into the sterndrive through a exhaust bellow. would I still have something like that?

[Phoenyix]

I think I found exactly what You were talking about. Now that I found an image of one I can see it.

Note: I failed to mention that the engine did overheat. Seeing as the flapper is metal encased in a plastic/rubber material I may have melted the casing and those parts worked their way through the exhaust.

Thanks very much.

[Beech2000]

On Alpha One drives there is no need to separate upper and lower units for shift cable change out. In your case, sounds like it was a good thing units were split.

Sure find it hard to see how a broken flapper could work its way from the y-pipe through the exhaust bellows and all the way down to the lower unit. The flapper diameter looks to big to fit but I guess its the only explanation for mystery piece.

Good time to replace water impeller.

[Phoenyix]

Thanks for the replies. It was the exhaust flapper. After I took the exhaust apart I found the other half. The reason I separated the two halves was because I wanted to change the impeller while I had it out of the water.