reinstalling lower unit on evinrude

[buckmowens]

Can anyone help me? I have replaced a propshaft and installed an impeller repair kit on an 1975 Evinrude 85hp V4 lower unit that is manual shift with hydrolic assist. Everything went fine with no problems, until reinstalling the lower unit to the motor. Everything is lining up just fine. With the unit in reverse gear as described by the sevice manual I can get the lower unit up to the last 1/4 inch. I can feel the drive shaft hit the crankshaft and with a little turn of the prop I can get the two to mesh together smoothly. From what I can see there is nothing else holding it up. The shift rod is not bound up either. I'm at the point of torqing down the bolts, but afraid of damaging anthing after all the work.

 

[rudedude]

Re: reinstalling lower unit on evinrude

If every thing lined up and you have the L/U in place (no binding anywhere) you should have no problems.

 

[Solittle]

Re: reinstalling lower unit on evinrude

I can think of a couple of possibilities. One -the shift rod may be off center thus binding when it gets to the coupling under the carb. Two - the water tube may not be going into the proper hole and binding. Three- Did you put a lot of grease around and on top of the driveshaft splines? - if so the grease will prevent the driveshaft from going all the way into the crankshaft.

You can tighten the bolts a bit but I would not force them.

 

[mikesea]

Re: reinstalling lower unit on evinrude

Did the old oring come out with driveshaft.if not PERHAPS/it got wedged into the crank,but I would think it would compress enough.Try using the mounting bolts to help it CARFULLY,another thought,the rubber on top of waterpump,is there an old one on the mating surface of the mid section that didnt come down when lower was removed

 

[rudedude]

Re: reinstalling lower unit on evinrude

Did I read something wrong? You did say "every" thing lined up and you just needed to tighten the bolts . I assume you have the L/U bolts in and snugged up, RIGHT?

If you had too much grease on the top of the shaft then it may not seat all the way and when you tighten the bolts it may cause a problem.

 

[buckmowens]

Re: reinstalling lower unit on evinrude

Thank you for the responce. I think my problem may be grease. I noticed some black grease leaking out of the lower seal. Sounds like more work for me.

 

[buckmowens]

Re: reinstalling lower unit on evinrude

Thank you all for your help. I think my problem may be grease. I noticed some black grease leaking out of the lower seal. Sounds like more work for me. Sorry for the second post as I'm learning how to use the community forum.

 

[Solittle]

Re: reinstalling lower unit on evinrude

What lower seal?

 

[rudedude]

Re: reinstalling lower unit on evinrude

Thats a scary statement.


You have two seals in the top part of the L/U ,one is the shaft seal in the waterpump houseing, the other is where the shift rod goes into the unit, nether should have any grease or oil leaking from them.

 

[buckmowens]

Re: reinstalling lower unit on evinrude

I'm sorry, I should have been more specific. I'm talking about the lower seal in the power head. I have removed the lower unit a couple of times to be certain that nothing is obstructing the install. On the drive shaft splines in noticed black grease. I'm assuming it is coming from the lower crankshaft seal. Am I on the right track?

 

[rudedude]

Re: reinstalling lower unit on evinrude

Could be. How much greese did you put on the splined end of the shaft?

You do want to put a little on the splines but not on the top of the shaft.

 

[buckmowens]

Re: reinstalling lower unit on evinrude

I lightly greased it with none on the top of the shaft. I had more on it when I pulled it back off. Should I try and clean it up the best I can and try again? Or, am I looking at seal replacement? Where would the grease be coming from? I'm guessing it is the unburned solidified oil, colored by exhaust coming from inside the crankcase and leaking through the lower seal.

 

[moterboat]

Re: reinstalling lower unit on evinrude

I Ran Into That With Mine,i Had Missed The Water Pick Up Tube With The Lower Unit Which Bent The Tube..

 

[wmgraphics]

Re: reinstalling lower unit on evinrude

I am having the same problem. I am 1/8" from flush install.

When you do a normal install does the lower end meet flush with no problems or is there always a bit of space to ratchet together do to the exhaust gasket?

The water tubes are in the guide tubes in the water pump. The shift rod and end is out on the top and clear. I spin the fly wheel with it in gear and it spins the prop shaft. Before I installed I put grease on the splines of the crank shaft, only a little and none on the top.

This is my second try. I ran into the same problem so I dropped the lower and did notice a little nasty grease on top of the crank shaft. How much would make a difference? I think maybe when I was installing the shaft rubbed the sides and collected it on the top. Could it be packed up there and if so how do I clean out?

Should I drop it again clean the top of the shaft and try again. Also I cannot feel the drive shaft slip into place, could it be bound up with only 1/8" left for a flush install or would it be more than that?

 

[bigpoppakdog]

Re: reinstalling lower unit on evinrude

when I changed my impeller I couldn't get the unit to flush up right away. I lowered the motor down all the way and she slid right on.

 

[Evinrookie]

Re: reinstalling lower unit on evinrude

I wrestled with my LU for a while before realizing that I needed to turn the prop shaft slowly clockwise to allow the splines to line up. Slid right in flush. One other issue I had was while replacing the impellar I tried to slide the old one off the shaft and when it got to the splines it stopped. After a closer look I noticed that it looked like the splines had been hit by the crankshaft slightly and created a little burr on one side of a few of the splines. I took a file to the burrs and it has been fine since. I'm not sure if those burrs would have prevented me from re-installing the LU but it was no problem removing it.