67 80 Hp evinrude lower unit leak

zarillus · #1 February 14th, 2009, 09:19 PM

I have a '67 Evinrude 80 hp with a lower unit leak,i got a leak by the prop and one comeing out of a little tiny hole.It's spewing chunky black fluid very thick.Where should i start looking,I had it tilted up for about two hours then when i tilted it down and i noticed black fluid spewing out of a tiny little hole.

Another question i had was i have another 67 60hp with a perfect lower unit will these interchange?

Thanks

F_R · #2 February 14th, 2009, 10:12 PM

Well we know the 60hp is manual shift, but how about the 80? If they are both manual, they will interchange.

Check the oil in the lower unit and see if that is the same kind of stuff you saw running out. If not, then it wasn't lower unit oil you saw.

zarillus · #3 February 14th, 2009, 10:39 PM

how can i tell if the 80 is manual shift it has a belt nera distributor if that helps

F_R · #4 February 14th, 2009, 10:54 PM

Look on the starboard (right) side of the motor. Do you see a shift lever? All of the 1967 60hp motors had one. But about half of the 80hp motors were electric shift (no shift lever)

zarillus · #5 February 14th, 2009, 11:28 PM

Serial number is E03695 and 80793M does that tell you anything.Sorry I can't get out right now to go look at it.

F_R · #6 February 15th, 2009, 06:52 AM

Yep, that tells the story.

80793 is a Starflite 80 Electric shift. Manual shift Speedifour 80 is 80753

Evinrude Boater · #7 February 15th, 2009, 09:23 AM

Likely not leaking either. They have a drain hole just below the water intake. Black goo drains out of the exhaust housing through that hole. It's just unburnt fuel mixed with carbon. That's what happens when the motor idles. It's normal.

zarillus · #8 February 15th, 2009, 10:18 AM

My leak is not coming from the hole in your picture it's oozing out of a small hole next to the larger bolts in your picture,i'm guessing the ones you take off to remove the lower unit.The size of the hole is is tiny

tashasdaddy · #9 February 15th, 2009, 10:22 AM

the vent and fill and drain are not in the picture. read this. http://forums.iboats.com/showthread.php?t=207285

zarillus · #10 February 15th, 2009, 10:52 AM

I attached a drawing of the leak.

zarillus · #11 February 15th, 2009, 04:49 PM

I notice that same small pinhole on my 60hp,what is the pinhole used for

zarillus · #12 February 15th, 2009, 08:06 PM

tashasdaddy i read your post however i don't have a two stroke and im wondering what this hole that is leaking is used for.

Evinrude Boater · #13 February 17th, 2009, 05:59 PM

Zarillus, everything in 1967 was two-stroke, yours is a 4 cylinder 2-stroke. The other drain hole is as shown in my photo. You can see the oil stain on mine after it drained. This again is normal.

zarillus · #14 February 19th, 2009, 04:55 PM

Thanks guys appreciate the help!! I got 4 clyinder confused with 2 stroke.