79 jrude lower unit . Finished but???

Jquest

Petty Officer 1st Class
Joined
Jan 16, 2004
Messages
278
I finished putting to gether my lower unit. Before I filled it up with oil, I checked the pressure and no leaks. The only thing that bothers me is... when I twist the shaft, it's not as smooth as I would like it to be. If I don't hold it down (putting pressure from the top) as I turn the shaft...I get like a clanking noise as it rotates. If I put pressure down on it and rotate it..then it goes into the splines smoother. I still think it is not as smooth as it should be. Also, when I turn the shaft(in neutral)the prop shaft tends to rotate, just slightly, sometimes.<br />I don't know if this is because everything has to adjust cause of the new seals or it's that some 3m 847 glue that might of gotten onto the gears. Remember...my lower unit opens up into two pieces. I don't mind taking it apart again, it's I just wanna be sure something is not binding.
 

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: 79 jrude lower unit . Finished but???

What's the hp Jquest? A dull clatter with the lower unit in gear and no gear lube is common when the drive shaft is rotated. You can "feel" the gears mesh as it rotates. What you don't want is any binding in there. Everything in there should rotate freely.<br /><br />You might pull up or push down on the shift rod if the prop shaft rotates a little in neutral....dog lobes may not be all the way centered between the gears.
 

Jquest

Petty Officer 1st Class
Joined
Jan 16, 2004
Messages
278
Re: 79 jrude lower unit . Finished but???

25hp 79, model 25953R. I took it apart again and Yeah. I found some sealer on the gears, so I cleaned it all out again. I have to go easy with that stuff. What I'm gonna do is...I'm gonna put it back together without the glue or gasket and see if the meshing is better. <br />It did have oil when I was doing it, but it just wasn't smooth. I'm just gonna take it slow with trail and error. For being over 25 years old...the gears are in great shape. Don't wanna mess anything up. :) <br />Thx for the advise admiral. :thumbup:
 

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: 79 jrude lower unit . Finished but???

Let us know how you make out and how she runs. Good Luck!
 
Top