1962 Evinrude Speeditwin lower unit will not come off

[1up]

Hi

Old engines are great just that everything is stuck.

So, lower unit is stuck. I have screwed out the eight screws and removed the nuts on the threaded 'pin' at thee forward facing side. The shift rod is disconnected as well.

Could something else need losening?

I read someone said the water tube could have stuck with the grommet.

I pitted with a large screwdriver at the forward facing area careful not to damage the meeting surfaces so I have a slight window open. I put 5/56 on the water tube.

Any other ideas or auggeations are moat welcome. I also hammered on the rear facing gearcase unit with rubber hammer to no avail.

 

[Joe Reeves]

Re: 1962 Evinrude Speeditwin lower unit will not come off

Sounds like someone in the past didn't install the driveshaft's top O ring and/or apply grease to the driveshaft splines. If so, the driveshaft splines are rusted within the crankshaft splines.... a real PITA! However..........

What's the model number of that engine?

In your previous post, you ID this engine as a 1962 28hp model. The lower unit on a 1962 28hp model attaches with seven bolts, not eight... and there are no nuts or threaded studs at the forward portion of it.

 

[1up]

Re: 1962 Evinrude Speeditwin lower unit will not come off

282030 it looks like. Thanks for the quick reply.

Upon using 40 cm screwdriver I opened it up slightly more but it is not near sliding out effortlessly.

I do not know if It help but the motor can turn. So at rhe very least it is not seized.

Further help is appreciated.

Who doesn't like pita repairs.

 

[Joe Reeves]

Re: 1962 Evinrude Speeditwin lower unit will not come off

I edited my previous reply... take a look at it. That model number, if accurate, is on target BUT your explanation of that engine's design is not that of a 1962 28hp Evinrude.

The retaining bolts of a 1962 28hp model's lower unit are six small (usually 7/16 hex head) bolts) on the sides and one large 9/16" hex head bolt at the rear portion of it. A picture of that engine would help.

 

[Joe Reeves]

Re: 1962 Evinrude Speeditwin lower unit will not come off

The thought ocurred to me that you may have a much later model engine, in which case I have no idea where that quoted model number came from, however............

If that lower unit has a plastic two piece water intake screen, removable via two philips screws, and this is where you disconnected the shift linkage, perhaps you did not remove the small plastic retainer from the top rod that retains the top retaining shift nut. Notice which way the taper of that plastic retainer faces. It has a split in it so that you can spead it to remove and replace it.

 

[1up]

Re: 1962 Evinrude Speeditwin lower unit will not come off

Thanks Joe. You are right about the screws actually. I was referring to the ones at the bottom near the drive unit. Th hissing the lower unit to the upper unit are six 3/8 inch hex heads.

 

[1up]

Re: 1962 Evinrude Speeditwin lower unit will not come off

The problem is solved now. It seems it was really stuck at the water tubing. Ones I got the proper leverage with the screwdriver at the center of the unit it broke loose. The o ring sadder there.

But there is a need issue now. The impeller housing can not be lifted off of the drive shaft. Reason? It appeara at some point in time the shaft was welded!? At about four inches from its top.

I see three solutions to this.

1) Use a solder iron and melt a little of the housing near the shaft so as to pass the larger diameter shift at the weld. This may result in leaking pump housing I guess.

2) Use a metal 'file' to polish off some weld seam allowing the housing to pass. This could weaken the weld however...

3) Some how side the housing off of the shaft the wrong way, towards the propeller. But I do not know if that can be done and if it is a lot of worke in involved. But its would leave the housing u.harmed.

It was interesting to see also the guy last putting in an impelled used thr wrong size. The canes were intact but did not touch the walls of the housing at all.

 

[1up]

Re: 1962 Evinrude Speeditwin lower unit will not come off

Thanks for your help. Sometimes it is just what is needed to get a drag perspective on things and get forward.

Sorry for bad spelling.

Any further help would be much appreciated.

 

[Joe Reeves]

Re: 1962 Evinrude Speeditwin lower unit will not come off

The driveshaft simply slides out of the lower unit. Won't the impeller etc slide off the bottom of the driveshaft?

 

[tx1961whaler]

Re: 1962 Evinrude Speeditwin lower unit will not come off

^^^^ What Joe said. Pull the drive shaft straight up and it should come out.

 

[1up]

Re: 1962 Evinrude Speeditwin lower unit will not come off

Thanks for support. I tried pulling the shaft yesterday before I read your comments but it seemed to get stuck. Perhaps it will slide right out of the water pump housing if I wiggle it a little. Will try that on Wednesday.

Thanks again.

 

[Joe Reeves]

Re: 1962 Evinrude Speeditwin lower unit will not come off

Unbolt and remove the water pump. Do not pull the driveshaft thru the water pump housing.

 

[1up]

Re: 1962 Evinrude Speeditwin lower unit will not come off

Thanks, it worked.

After putting lower unit back the shifting works. I can engage reverse, neutral and forward. However the drive-in seems stuck. I can not rotate the prop while rotating the flywheel by hand. Seems stuck. Is it possible to assemble lower unit with prop axle in there in a wrong way?

Any ideas as to what may be the issue? Perhaps something similar have happened to someone else.

Inputs are welcome.

 

[AlTn]

Re: 1962 Evinrude Speeditwin lower unit will not come off

with the prop off, can you spin the f/w and engage f/n/r?...that is, the prop shaft is turning one direction in fwd, the reverse direction when reverse is selected, and is not spinning at all in neutral?...the driveshaft needs to be turning while you are selecting the gears, otherwise the cluch dog ears may just be hitting the gear face and you may damage something in the shift linkage if you put a lot of pressure on the shift handle

 

[1up]

Re: 1962 Evinrude Speeditwin lower unit will not come off

Turning the flighwheel does not render movement in any gear. I move the fligtwheel very little as the pressure it takes and how it feels make me think something is wrong. Perhaps in the gear unit?

Further suggestions are welcome.

 

[Joe Reeves]

Re: 1962 Evinrude Speeditwin lower unit will not come off

I've been trying to figure out what you're speaking of.

You state in post #13 "After putting lower unit back the shifting works. I can engage reverse, neutral and forward."

If in neutral, you can spin the propeller BUT when you put the shift lever into either forward or reverse, the dog lobes engage and prevents you from turning the propeller, the lower unit is shifting as it should.

Now, in neutral, and with the spark plugs removed, can you turn the flywheel by hand? And if you can turn the flywheel without any trouble, then put the lower unit into either gear and turn the flywheel again. What are you encountering?

 

[1up]

Re: 1962 Evinrude Speeditwin lower unit will not come off

Thanks f?r taking the time to help out. What I will do is try screw the plugs completely. Earlier it worked turning the flywheel with them in this state. Perhaps they have corroded a bit and seal better now. I will check that tomorrow.

 

[1up]

Re: 1962 Evinrude Speeditwin lower unit will not come off

Thanks you it m?rker. There was no problem. Thanks Alain. The flywheel was just a bit stuck.