tear down 50 horse 1974 evi

[reeldutch]

i dropped the lower unit today thanks to obj.<br />i loosend 6 of the 8 ph bolts that hold the ph onto the adapter.<br />2 are completely rusted and rounded.<br /><br />how can i remove them.<br />i was thinking of grinding them down and lift the head is that possible?<br /><br />look at the picture <br /> http://groups.msn.com/outboardpictures/rebuild1974evinrude50hp.msnw?action=ShowPhoto&PhotoID=13 <br /><br />hophely i can get them out.<br /><br />thanks reeldutch

 

[angus63]

Re: tear down 50 horse 1974 evi

I'd soak and heat and work with the existing head you still have left with vise grips or pump pliers until the head breaks or they come loose. If you grind em off, you still have the same issue with a smaller shaft. At that point I would cut em flush, center drill, drill, and use an extractor. Either way, a good soaking with Kroil or PB Blaster, and a judicious use of heat will be needed (along with prayers and libations).<br />Good luck

 

[reeldutch]

Re: tear down 50 horse 1974 evi

i was thinking to use epoxy or plummers putty and stick that in the socket and let it harden for a day.<br />then drive the bold out.???<br /><br />could it work??

 

[Paul Moir]

Re: tear down 50 horse 1974 evi

I second the vice grips. That is to say, Vice Grip brand locking pliers (cheapies never seem to work for me). Sometimes I file flats into the bolts so I can get a better grip. Then propylene, penetrating oil, and patience. You'll need to save your cursing for when the bolt head breaks.<br /><br />Nowadays I'll weld a little handle onto the top of the bolt in these cases, and grind it off once the bolt has been broken loose. If thats an option, I suggest you try it.<br /><br />I've got doubts about the epoxy. It's going to be really hard for it to get a grip on the bolt since there's little to key to.<br /><br />Those bolts are a pain in the neck to get at. Good luck with them!

 

[reeldutch]

Re: tear down 50 horse 1974 evi

o boy am i in trouble now,<br /><br />i got so frustrated so i grinded them down and thought the ph would break free.<br />grrrr didnt happen only the 8 bolds and the 4 inside are holding the ph down right?<br /><br />it looks like those two bolts holding the whole head tight.<br />time to take the drill out grrr

 

[Paul Moir]

Re: tear down 50 horse 1974 evi

Last time I delt with bolts looking like those, I ended up standing on the underside of the flywheel with the outboard upsidedown and supported by the midsection beating on the remaining studs of the hold down bolts that had chosen to snapped off. Darn white death-grip stuff...<br /><br />PS - I also found a new way to remove the flywheel. <br /><br />Good luck, and if it's any consolation most of the bolt studs came out of the block easily enough w/ penetrating oil, vice grips and heat.

 

[rodbolt]

Re: tear down 50 horse 1974 evi

reeldutch<br /> welcome to salt water <br /> did you remove the nut from the stud at the aft center ofthe powerhead?<br /> but if the bolt shanks are stuckin the powerhead adapter then your only option is to cutthe bolt.<br />how I do it is drawa vertical line upthe bolt to the baseof the power head. carefully center punch and drillhorizontally through the adaptor and the bolt. if your careful it wont damage anyting and the rest of the bolt you can remove later from the block andadapter. my space bar is dying

 

[reeldutch]

Re: tear down 50 horse 1974 evi

thanks,<br /><br />i removed 6 bolts and grinded two down.<br />removed 4 bolds inside(two in the front and two in the back)<br />didnt see a studbold.<br />where is it located??<br /><br />il try putting the moter upside down and start banging.<br /><br />if that doesnt help i drill the sun of a gunn.<br /><br />i did take the ph of a v4 last year but that was a 90 saltwater. this is a 74.<br />i'm not gonna touch the exhaustcover thats for shoure.<br /><br />thanks i apreciate the help

 

[Paul Moir]

Re: tear down 50 horse 1974 evi

If you do end up flipping it, thread a couple long bolts partly into the powerhead hold down bolt holes you did get out. That way when the engine drops it doesn't go far.

 

[rodbolt]

Re: tear down 50 horse 1974 evi

hello<br /> go under the cyl head under the powerhead adapter and you will see a nut. its at the aft end of the block pointing down. use a long shanked 1/2" box end. its a wolly booger to get to but its there. but dont go twisting and flipping the motor. takes 10 min to cut the broken bolts with a drill. if you dont like the hole it left,wont hurt anything, have it welded back up when your done.<br /> but if you try to force the powerhead off and the nut is not off the stud there is a good chance of breaking off the aft end of the adapter. the stud nut is almost the same location as the two aft power head studs on the 90 v4.

 

[reeldutch]

Re: tear down 50 horse 1974 evi

 

[reeldutch]

Re: tear down 50 horse 1974 evi

so far so i got the nut of the stud under the cylinderhead.<br />ofcourse she was rusted and rounded off so i drilled her and broke her of that wasnt to bad.<br />now i have all the bolts of but still two bolts stuck in there.<br />so i drilled the holes in the adapter and i got them cut.<br />but the ph is still stuck.<br />aaaarg <br />i used the torch around the adapter used wd40 also<br />this ph has to come of soon or am i still forgetting something here?<br /><br />will see tomorow if she will give up.<br />i'm not<br /><br />reeldutch

 

[rodbolt]

Re: tear down 50 horse 1974 evi

is the lower unit already off ?<br /> and sometimes the stud that is left in the adapter will lock it. try to cut the side ones as close to the power head as posibble

 

[reeldutch]

Re: tear down 50 horse 1974 evi

yes the lu is of.<br />i cut the studs in the middle of the adapter.<br />it must break free<br />il try tomorow will keep u posted<br /><br />reeldutch

 

[rodbolt]

Re: tear down 50 horse 1974 evi

salt water sux <br />good luck and try some oxy/acetylene or at least MAPPgas on the studs.

 

[reeldutch]

Re: tear down 50 horse 1974 evi

didnt work on the motor today but came up with a good idea.<br /><br />i put the motor on a sheed of plywood and hook the flywheel up unto an hoist and the midsection of the motor strap around a tree and start cranking the hoist.<br /><br />sound good to me.<br /><br />where can i find a lower cowel or pan??

 

[Basscat 1]

Re: tear down 50 horse 1974 evi

Are you talking about the power head is stuck to the adapter? If so, I had a simliar problem. It took me 4 hours of prying and beating to get them apart on my 1974 Johnson. After tearing the engine down I found out why it was stuck. The lower crankshaft bearing was shot, thus causing a heating problem at the lower end of the crankshaft. After 31 years, the heat and rust combo caused the splined shaft to really be stuck into the crank. If you can pry it apart a little bit, spray some penetrating oil in there.

 

[reeldutch]

Re: tear down 50 horse 1974 evi

i got it,<br /><br />thanks rodbolt.<br />i cut the studs and then i put the outboard inbetween 2 trees and used a flywheelpuller to connect a hoist and tied the midsection with ropes to a other tree.<br />i started cranking the hoist and it didnt come of easy i heatet the adapter and last thing i did i used a crowbar to push the stud in the rear and that did the trick.<br /><br />happy its off now its time to start cleaning that baby. <br />oh boy she will look prety when shes done.<br /><br />thanks again.

 

[reeldutch]

Re: tear down 50 horse 1974 evi

oh i'm still looking for a good lower pan or lower cowel.

 

[rodbolt]

Re: tear down 50 horse 1974 evi

reel dutch<br /> i have one but the motor is complete. its locked updue to sinking. the powerhead may be off I dont remember.