1st time lower unit removal, what is this part and where does it go?

[Karla45]

Re: 1st time lower unit removal, what is this part and where does it go?

Okay so now I finally got the seals off, i think I was being too gentle with it. Problem is they both fell out at same time so not sure which way the middle one goes, I know which way the bottom one goes but the one that is inside the bore I am not so sure abbout. I may be clearer when I get the parts. I would like to clean the inside of of this(bore) because it is oily and gritty. Would simple green be a good thing to soak a nd clean this in or should I stay away from simple green?

Also on the water pump where the tube looking thing is, I want to know if there is supposed to be a seal on top of it or small oring, the top part was a little melted which you can see in photo. There was a seal on top of waterpump with the driveshaft going thorough it but in my diagram it looks like there is also supposed to be what is called a waterline seal #9 in diagram which i never saw(it could have melted).

Also, my diagram has confused me a little I cannot find #32 in the parts i have taken off so far, it says the part is a retaining ring and I guess why it confuses me is that it is at the top of diagram between #3 & #4 and I am not sure what it is supposed to look like. From taking the lower unt apart so far I am finding that I do not have the same number of parts as showed in diagram. Here is diagram for my lower. http://www.boats.net/parts/search/Merc2/Force/85 H.P. (1989)/856X9G/GEAR HOUSING/parts.html

 

[jerryjerry05]

Re: 1st time lower unit removal, what is this part and where does it go?

Yes that's what I responded to.
#32 might have been taken off and not put back in.Look in the coupler??
Simple green is ok.I wouldn't soak it in simple green but use it to cut the grime.
#9 needs to be there.It makes the pickup tube line up right.Look up in the housing.
The rubber seal on the shaft is needed too.

 

[Karla45]

Re: 1st time lower unit removal, what is this part and where does it go?

okay I found the retaining ring inside the coupler. I have inspected the drive shaft and everything looks good. On the driveshaft do I need to oil the whole shaft or just where the splnes are. I was going to put anti-seize on it but I have read not to do that and that it can harden but I have used it on my prop shaft and it did not harden except for it dried out on the top part of the nut(possibly because of 100 degree plus weather not sure). Anyway I just have the permatex automotive anti seize lube and it does have copper in it. Should I continue to use this? I also have some triple guard waterproof grease. I am thinking about taking picutures of what parts I have taken off just so I can make sure everything is there since I would not know if something is missing.

 

[tater76]

Re: 1st time lower unit removal, what is this part and where does it go?

I use standard marine grease, the kind you use for your trailer bearings as it can take pretty high heat. Frank A has mentioned anti seize in multiple posts, so I am guessing that would be fine too. Don't be afraid to get liberal with it

 

[Karla45]

Re: 1st time lower unit removal, what is this part and where does it go?

okay so am I supposed to grease the whole shaft or just the splines?

Also, on the retainer #30 above the bearing cup the end of the teeth that surround the driveshaft are a little rough instead of smooth, will this cause any problems? you can see this in a picture I posted on the second page of this thread.

 

[Karla45]

Re: 1st time lower unit removal, what is this part and where does it go?

okay now I have a different issue. I got the parts. I had mentioned earlier in a post that there was no seal on the part of the water pump that is for water line. When I got the part it was white tubular seal (first photo). I then went and looked up in the motor leg and there was a a white tubular part that also looked like the seal I just got (second photo). I started to try and take it off but I would have to start turning the line to get it off. I am not 100% sure if I am supposed to take this off the upper leg and not sure if I should be turning the water line, I do not want to break anything. I put the new part in water pump (3rd photo). The question is are these both the same part or do these two fit together?

 

[pnwboat]

Re: 1st time lower unit removal, what is this part and where does it go?

The white seal on the water line is the same seal that you show in the first picture. You should take the seal off of the water line. If you notice, the larger diameter opening on the new seal has a slight flare or taper to it. Insert the seal into the water pump as in the third photo with the tapered opening facing up. The tapered opening will make inserting the water line into the seal/water pump easier when you go to install the lower unit when you're putting it all back together.

The seal that is stuck on the water line normally should just slide off. Be careful about twisting the water line itself because there is a rubber seal at the top of the water tube that may be damaged if you twist it too much. To replace the upper water tube seal, you have to remove the power head. You can either cut the stuck seal off, or maybe heat it up carefully with a propane torch. The water tube itself should be made out of a metal bronze alloy.

 

[Karla45]

Re: 1st time lower unit removal, what is this part and where does it go?

Well with my luck the seal is not sliding off so easily. What if I pull on the water seal pretty hard? Would this cause any damage in the upper part where the powerhead is? I am pretty sure I do not want to have remove the powerhead.

 

[pnwboat]

Re: 1st time lower unit removal, what is this part and where does it go?

If you pull hard enough, you'll pull the tube right out of the the upper seal.

 

[jerryjerry05]

Re: 1st time lower unit removal, what is this part and where does it go?

A hard pull will pull out the water tube,Spray with WD or PB blaster.A pair of pliers/chanel lock on the tube and try to twist it off.
You might be able to reinstall with it still there.It a lot easier to have it on the pump when you put it back together.
NO anti-sieze.Triple guard grease.Or any marine grease.I use white lithium.J

 

[Karla45]

Re: 1st time lower unit removal, what is this part and where does it go?

So you recommend white lithium on the driveshaft and lubing the other parts when I reassemble? Right now I am trying to get all of the build up off the inside of the bore where the seals go. There is also build up in the hole where the driveshaft goes that I am having a hard time getting off. I am using carb cleaner but I may have to try something else.

 

[jerryjerry05]

Re: 1st time lower unit removal, what is this part and where does it go?

Yea white lithium or the Triple Guard from OMC Or any Good marine grease.
I use sandpaper,wire brush,small pic set.Just don't dig too deep.Or sand off too much.
You got a lot of responses on the pontoon.Id look at the prop and see what pitch is on the side of the prop.Should have #s stammped there.
You gave out some good advice the other day too!!!J

 

[Karla45]

Re: 1st time lower unit removal, what is this part and where does it go?

Thanks for the compliment but I would have to say that it is because I am getting good training from you guys on this board! Next time I go to Arkansas I will check it out the prop I only go there about 3 times a year.

 

[Karla45]

Re: 1st time lower unit removal, what is this part and where does it go?

Okay now I have another question, the manual says to apply thread locker sealant to all seals with metal case. WOuld this be correct for the driveshaft seal that goes into driveshaft bore? I have permatex 2 sealant for gaskets. WOuld this be okay?

 

[jerryjerry05]

Re: 1st time lower unit removal, what is this part and where does it go?

Permatex is good for the seals and o-rings etc.
The thread locker is Lock Tite.For the screws threads, that you don't want to rattle loose.
Like the piston rod caps.Or the screws that hold the stator in place.

 

[Karla45]

Re: 1st time lower unit removal, what is this part and where does it go?

Well so does the permatex 2 bond metal to metal? The driveshaft seal itself is encased in metal and then the bottom of the seal would contact the metal grove on the inside of the bore which looks like it is there to keep the seal from going in to far. So I guess you are saying yes I can use the permatex 2 instead of thread locker to bond the seal to bore? I am not talking about putting permatex on the whole metal part of the bottom of the seal just the edges where it touches metal part of bore.

 

[jerryjerry05]

Re: 1st time lower unit removal, what is this part and where does it go?

That's right.It's there to seal the seal.If you just put them in they could leak.
You can't use to much,but can use too little.
JUst like painting,a thin coat will cover.
I cover the seal and the housing.J

 

[Karla45]

Re: 1st time lower unit removal, what is this part and where does it go?

I am really glad I asked this question otherwise, I would have put the seal in without a sealant. The only problem is that I already put the first seal in the bore without using any sealant :facepalm: That one comes out easier so I think I can get it out without causing any damage.

 

[Karla45]

Re: 1st time lower unit removal, what is this part and where does it go?

Now I have another question. I noticed an area on the gear housing where there was some pitting going on(small holes). Which leads me to believe that some of the metal is breaking down. It is on the part of the housing right under where the water pump goes close to the lip for the driveshaft hole. I was thinking of putting a light coating of triple guard grease there but I am not sure I should do this because I think water flows through this area. Is it okay to do this to prevent further breakdown?

 

[jerryjerry05]

Re: 1st time lower unit removal, what is this part and where does it go?

Won't hurt.Probably won't help.Once corrosion starts it's hard to stop unless you grind it out and reseal.
Post a pic.Unless it's a sealing surface then I wouldn't worry.J