1977 115 murcury lower unit..HELP!

[TWOBADFISH]

Any help Thank you...

I have drop the lower unit. But i can not get the shaft poll out..All bolts are out..just wont come out... Iam new so thank you for any help..

And any other advice on the 77 lower unit to get me on the water would be great to..

Thanks again...

 

[Chris1956]

Re: 1977 115 murcury lower unit..HELP!

You did get the bolt under the zinc anode, right?

Is it the upper shift rod that won't seperate from the lower shift rod, or what?

 

[TWOBADFISH]

Re: 1977 115 murcury lower unit..HELP!

First Thank you for the reply

The housing that the top rod goes into wont come off to pull the top rod.

Have not tryed the lower rod yet.

your very kind for any help

thank you

 

[jimg984]

Re: 1977 115 murcury lower unit..HELP!

shift rod seprates at the bottom section you gave no reply about the bolt under the fin fin must be removed to get to that bolt

 

[444]

Re: 1977 115 murcury lower unit..HELP!

When I took the lower off my 86 90hp I had to help it off carefully with a crow bar covered with a rag to not damage anything. Just make damn sure you have all the bolts out before trying that!

 

[TWOBADFISH]

Re: 1977 115 murcury lower unit..HELP!

Gents first thanks agian.


I'am very new to getting into the moter. I've boated for years and fished for ever.. Just want to do things for myself at 45..

The lower unit is droped and on the bench. all bolts and oil screws removed top of impeller removed. ( I do not no what a fin fin is Please help).. But all screws and bolts that i can see are out.

I need advice on how to get both shafts removed So I can rebuild it.

Your help is GREAT.

Jeff.

 

[jimg984]

Re: 1977 115 murcury lower unit..HELP!

fin=trim tab the thing that was hidding that last bolt you missed lol

 

[TWOBADFISH]

Re: 1977 115 murcury lower unit..HELP!

LOL thanks Jim..

OK around the lower ( short) shaft.. there is a large round 6in round notched washer does that haved to be unscrewed to pull the shaft? and if so right or left turn?

Thanks
Jeff

 

[jimg984]

Re: 1977 115 murcury lower unit..HELP!

Jeff,, i don't think you wanna pull those shafts out, if do you will need to pull the prop shaft out to do that and remove bearing and gears... if you wanna replace the water pump empeller and reseal shafts should be able to do without removing the shafts . short one is shift shaft,, other one is drive shaft

good luck
do it slow and drink ice water

(the easy way to remove everything is with a big sledge hammer) just kidding

 

[monk-monk]

Re: 1977 115 murcury lower unit..HELP!

Is the LU bad internally or something....tell us what your trying to accomplish here..?

 

[Moody Blue]

Re: 1977 115 murcury lower unit..HELP!

TWOBADFISH, sounds like you are trying to pull the prop shaft from the lower unit housing, correct?

The large washer as you described is actually a large nut that holds the entire bearing carrier/prop shaft inside the housing. The nut is locked with a tabbed locking washer. You must locate the tab that is bent over into one of the notches of the nut and straighten it out. Now you must unscrew the nut turning it CCW. There is a special tool to do this and it will not come out easily. You can be creative and try different approaches to unscrew it but you may end up drilling it out and replacing it with a new one.

Once you have the nut off, the whole inner bearing carrier and prop shaft "simply" pulls out. Again, it will not come out easily and you have to be creative in your approaches.

There are several good posts in this forum detailing this project. Do a search and spend some time reading. You will want to invest in a proper manual before attempting repair or rework of the lower unit.

 

[TWOBADFISH]

Re: 1977 115 murcury lower unit..HELP!

Guys. Thank you very very much.

Both shafts turn seem to turn nicely so I will take your advise and not go there.. I am receiving the manual fri. So I will work on the impeller and so on. Your advice has been greatly appreciated.. And I will invest in a sledgehammer soon ..lol

I will be in touch with lots more advice needed, And appreciated.. Sense I am trying to rebuild this 1977 18ft crestliner (fishing machine) 1977 115 murc with my son. He has just returned for Iraq, And this is are journey together..

Talk to you soon I hope.

God bless America.
Jeff and Vinny
AKA.. TWOBADFISH