Removing LU 85rude

[wavrider]

This is a parts engine, LU seems to be ok as far as going in to gear. Power head locked up, got it soaking with PB blaster but I do not have much hope of it unlocking.

Got the bolts out of the lower unit,all of them, shift linkage disconnected.
LU does not want to come out, not moving any at all. Probaly corroded into the powerhead on the splines.

Amy tips, tricks, hints appreciated, thanks for the replies.

 

[HighTrim]

Re: Removing LU 85rude

How many bolts did you get Wav?

 

[wavrider]

Re: Removing LU 85rude

6, 2- 9/16 port side, 2-9/16 starboard side, 1-7/16 on the tab and 1-5/8 under the tab, the long one thanks for asking

 

[HighTrim]

Re: Removing LU 85rude

Unfortunately the splines are probably seized as you thought.

Some light taps with a rubber mallet may break it free. If you do get the power head un locked, turning the flywheel while tapping should help free up the drive shaft splines. I would probably put a couple of the 9/16 back in while doing this, because when she breaks free, it wall fall, and fall fast. Removing the prop is also a good idea. Good luck.

 

[wavrider]

Re: Removing LU 85rude

Thanks HighTrim,
Been soaking it for a week in PB blaster, put the socket and breaker bar on it for the first time tonight, moved a fraction, or maybe my eyes moved but she is frozen hard, I may pull the heads tomorrow to take a look.

thought about hanging it upside down from the foot with a block n tackle, powerhead about a half inch off the deck with a piece of plywood on the floor to see if Einstein's theory worked on outboards also.

I do not know of anyway to get any penetrating fluid into the splines to let it soak, may have to pull the power head

 

[ezeke]

Re: Removing LU 85rude

Since the powerhead is locked up, I don't see you turning the flywheel.

Go to a lumber yard and buy a couple of bundles of wood framing shims, then use them to spread the gap between the gearcase and midsection, keeping the front and back equally apart at all times. Work slowly and give the force time to work.

 

[tashasdaddy]

Re: Removing LU 85rude

hang it upside down like you said, and do what ezeke said the powerhead is heavier than the lower. get a space in it, PB blaster with a straw the heck out of it. even drill a small hole, that you can fill, in the midsection shaft side, to get PB blaster in.

 

[HighTrim]

Re: Removing LU 85rude

If the penetrating oil doesnt work after a couple weeks, you may need more drastic measures.

Mix a solution of a few tablespoons of oxalic acid to water. This solution eats rust. There are probably pre made solutions available. Position the engine horizontally on the floor, prop up. If the outboard is on a boat, try lowering the tongue as low as you can to the ground. Once it is horizontal on the floor, put some wood under the gear case so that the engine cylinders are in the most vertical position possible. The idea behind this is that when the acid solution is injected into the cylinders it will flow freely around the engine’s pistons, not leaving any dry areas, as it may if the cylinders were horizontal. Add the solution a couple times a day for about a week.

Put a socket on the crank nut and break the engine loose with an impact wrench. Stop immediately after you get movement though, since you will then add more solution, or now some PB Blaster, and allow it to free up. After this it should be able to turn as normal.

Sorry, was typing same time as Ezeke and TD, I would try their idea, seems more logical.

 

[Benny1963]

Re: Removing LU 85rude

if your lower is stuck at spline try useing shims all the way arund tapping them in equaly when you get them tight take a piece of wood and hammer and tap on lower lighty and try driveing them in more . if it is stuck badly you may have to string engine in air and try to get thin metal straps through gap between lower and mid then you will need to fasten straps to ground and use hoist to put pressure on the unit by jacking up with lower unit fasten at ground when you get some pressure on it try your wedges again
after i strung mine up i had to youse to metal prybars while i tightened up th lift it finaly popped loose.moine was horrible but i finally got it of after two weeks.
good luck bennyb

 

[wavrider]

Re: Removing LU 85rude

Thanks for all thwe replies and the tips. I will hang the engine upside down today and see where I can get the pb blaster into the splines. If I drill a hole on the mod section where should I drill it at.

My nephew is a good MIG n TIG welder so I can always get it filled back in if need be but as of now priority is to get the LU off, well not rreally a priority just a big want, thanks again for replies

 

[wavrider]

Re: Removing LU 85rude



There is no driveshaft in the motor, just the water tubes and exhaust housing. exhaust housing is broken. Noticed the 5/16 bolts on the cover were loose and some of the 7/16 bolts inside the cowl looked fairly new and no corrosion, got me thinking.

Drilled a hole in the starboard side to apply some pb blaster and view the situation, no drive shaft.

Only thing holding it together is the water tubes and corrosion

Anyway end of that project! the price I paid for it was not bad considering I tested the coils, power pack on a known good engine, so parts is parts but no drive shaft

thanks for the tips

 

[tashasdaddy]

Re: Removing LU 85rude

get the lower off anyway, and sell the casing. so someone can rebuild a cracked casing. now you can knock hell out of it. above the lower.

 

[HighTrim]

Re: Removing LU 85rude

I cant seem to imagine what could be holding it?? A copper water tube?

 

[ezeke]

Re: Removing LU 85rude

Maybe the seventh bolt is holding it.

 

[wavrider]

Re: Removing LU 85rude

Maybe the seventh bolt is holding it.

So I am cleaned up ready to go to Wally world, daughter needs to get her nails done, I ned some 2 stroke oil.

Take time to read the forum and enjoy a glass of tea.

See the above post

Take off to the shop, look WAY UP in the housing, scratch my head and wonder who snuck in here and put that 7TH, bolt in???????

Funny thing is I have a Seloc manual and just replaced the water pump last week on a 73 rude, same procedure:redface:

Maybe I need get my nails done also.

Going to go out to eat tonight, I might forget to turnm the stove on when I start cooking

Thanks Ezeke, LU is off.

 

[tashasdaddy]

Re: Removing LU 85rude

gut it out save the case, midsection, heads etc. craigslist. or ebay.

i hate the weather man, i could have fished today. trailer went well.

 

[wavrider]

Re: Removing LU 85rude

Thanks for the tips and advice.

I was in the shop most of the day and as the day progressed it got better and better. It was a hard decision to keep working on the skeeter's rigging instead of jumping in the small boat and hit the lake

Maiden voyage (for me anyway's) tomorrow in the skeeter, hope the speck's and bass are biting