1983 Evinrude 35 lower unit won't slide off!!

pismoian

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i have an 1983 35 hp evinrude outboard model e35rcts that i am trying to replace the impeller. My problem is that the lower unit won't slide off. I have disengaged the shifter rod via the water inlet, the four bolts holding the lower unit to the exhaust housing, and the forward nut as my manual describes b ut the lower unit still will not slide off. Now I am stumped I have read that some models you have to remove a nut under the card but there is not nut to remove below my carburetor. Any help would be much appreciated. Thank you.
 

bankerjohn

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Re: 1983 Evinrude 35 lower unit won't slide off!!

Is the lower unit sliding down any at all? If not, the splines in the top of your driveshaft may be "locked" to the motor due to corrosion.

Has the motor been run in salt water?
 

Cofe

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Re: 1983 Evinrude 35 lower unit won't slide off!!

Use pliers and slide the upper nut half up the shift shaft to expose the plastic ferule under it. The ferule has a vertical slit that you can spread and remove with a fingernail or small screwdriver. Then shift the motor in forward and remove the upper nut half.

See Pic
 

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pismoian

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Re: 1983 Evinrude 35 lower unit won't slide off!!

no the lower unit isn't moving at all. I have no idea if this motor has been run is salt water before I bought it. When you say "splines in the top of the driveshaft" are locked, is there anyway to "unlock" them? or a way to acess them to see if they are gumed up?
 

Al-53

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Re: 1983 Evinrude 35 lower unit won't slide off!!

did you take the ferrule and top nut off the shift shaft....they will stop it....

there is no nut under the carb.I have the same engine....if you got the ferrule out and top nut on shift shaft off and does not drop....your shaft may be rusted in...you have to tip upside down and get some PB blaster in there to break the rust....if its dropped a little...get 2 of the plastic wedges they use for cutting trees...tap 1 in on both side....try to tap them litely to see if the LU drops...dont pry on it..or you bust the cast

Al
 

pismoian

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Re: 1983 Evinrude 35 lower unit won't slide off!!

Use pliers and slide the upper nut half up the shift shaft to expose the plastic ferule under it. The ferule has a vertical slit that you can spread and remove with a fingernail or small screwdriver. Then shift the motor in forward and remove the upper nut half.


to cofe:
I have removed the plastic ferule. When you say remove the upper nut do you mean the nut on the drive shaft? (in pic green arrow) or the forward nut( red arrow). if it is the green arrow, the nut on the drive shaft, then I cannot get the drive shaft high enough to remove the upper nut.
Next, Besides that question is there any thing else I need to remove? or at this point do I need to persuade it with a rubber hammer? Once again I have the drive shaft disconnected, the four bolts holding the lower unit to the exhaust housing, and the forward nut(blue arrow) are removed. With all of those components loose my lower unit still will barley slide down, (see pic, the screw driver is wedged is there as far as i could go before i felt like i might break something). I feel like it is getting held up on the stud the forward nut went on to (blue arrow), my assumption is because I can pry a little towards the propeller end, but not at all at the end where that stud is. Im sorry if this is confusing, if you have any questions please ask, ill be back on this evening. once again thank you all for the help. -Ian P.S. sorry no arrows, just words, sorry i deleted paint and couldn't figure out a way to put arrows in.
pismoian
 

pismoian

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Re: 1983 Evinrude 35 lower unit won't slide off!!

to al-53: i can not get the upper nut off the sift shaft, I have it in forward and there is not enough clearance to remove it. should i thread it back into the lower part bc the ferrule is removed? and when you say tie upside down do you literaly mean propeller up and engine down?. (opposite to how it would be mounted to the boat). and where should i spray the pb blaster? in the water inlet where the shift shaft goes towards the mortor? thank you.
 

Al-53

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Re: 1983 Evinrude 35 lower unit won't slide off!!

that shaft you show is the shift shaft....and the top nut needs to come off also....sometimes the rear stud on the back gets corroded in....spray it..tap it with a piece of wood on it....see if you can loosen it up....

I don't think you can get any rust buster in there now....the top nut should be able to pop off once it drops some....

I still think the rear stud may be corroded in....lets hope it is....try tapping the back stud a bit after a soak...use wood...


ok..I looked at your pictures again....you have a bolt in the rear..i have a stud with a nylon insert nut on it..mine is a 1983 johnson..your is a rude...never new there would be a difference...I am lost now how to split that

Al
 
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F_R

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Re: 1983 Evinrude 35 lower unit won't slide off!!

If it won't move down at all, the front stud is probably corroded in the upper housing. Extremely common, and even to be expected if it has ever been in salt water. You will need lots of heat and some scientific force to get it apart. Just look at the paint burned off the area on my motor to see what I mean.
 

Cofe

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Re: 1983 Evinrude 35 lower unit won't slide off!!

Heat that stud red hot, and spray some pb blaster on it. It will smoke like crazy. Then pry......Repeat.....Repeat....

If you get the lower unit to drop about a inch, and it still won't come apart. Then thread those 4 bolts back in about 5 threads each. Then put a rope or chain around the lower unit and hang the whole thing upside down with the flywheel about and inch over a piece of wood on the floor. Spray PB blaster into the one inch gap, about 2 inches behind that front stud.

The purpose of this is to let penetrant run down the drive shaft and into the splines in the power head. After time and prying,,,,,spraying,,,,,prying.....things should come apart.
 

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pismoian

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Re: 1983 Evinrude 35 lower unit won't slide off!!

thank you all, ill poist again when I have tried heating...
 
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