69 merc 1000 lower unit ate up!

[bmtsr]

I have a 1969 100 hp merc that I took out for the first time. its on a 15' bass boat and man did she fly!! But then I started hearing funny noises and I got her trailered and home and this is what I found. not sure what happened and dont know everything that needs replaced. definitely a bearing carrier, probably a prop, and hopefully not a case. would like to know some thoughts on cause and repair! thanx!

 

[Charlie61]

Re: 69 merc 1000 lower unit ate up!

I know you checked the oil in the lower unit before you went out; looks like you need a replacement lower unit now from the looks of it

 

[wired247]

Re: 69 merc 1000 lower unit ate up!

Got one for $100 if you need it and I'm relatively close to you. I'm in the Dalles.

http://portland.craigslist.org/grg/boa/3113368849.html

 

[CV16]

Re: 69 merc 1000 lower unit ate up!

I'm not sure about his 69, but I had to modify the 73 1500 lower I put on my 66 850. I no longer have the reverse lock on the 850 but I have power trim so I don't need it. I had to cut the shift shaft a bit to make it fit, but it does work.

 

[bmtsr]

Re: 69 merc 1000 lower unit ate up!

yes it had oil just filled it and replaced water pump before i went out. all the internals look very good hardly any wear on the gears or shafts. not sure why this happened.

 

[79Merc80]

Re: 69 merc 1000 lower unit ate up!

Looks like you or someone forgot to install the thrust washer in front of the prop. I had that happen too me once and it was 500.00 for the lower unit case and used my gears. That was in 1987.

 

[jimmbo]

Re: 69 merc 1000 lower unit ate up!

I too, also think the thrust washer was missing

 

[Wingedwheel]

Re: 69 merc 1000 lower unit ate up!

Ditto on the thrust washer.

 

[jimmbo]

Re: 69 merc 1000 lower unit ate up!

Looking at the housing, i would say you were luckly to get back to the launch. There wasn't anything holding the bearing carrier in, it looks like slmost all the threads are gone. A few good blasts in reverse and the prop along with the shaft, bearing carrier, and reverse gear might have been sitting on the bottom of the lake

 

[bmtsr]

Re: 69 merc 1000 lower unit ate up!

lol I had to use a trolling motor to get back it didnt want to go into gear at all! not sure about thrust washer will research it and find out if it was there. I ha worked on bottom end prior to going out but only water pump and gear oil.