Evinrude 55 1978 gearcase

[racerone]

It is easy to replace that o-ring in the shift cover.

 

[Mikko]

I don't know whether it was easy or not with a small screwdriver, but it is done. Seal seems to be so good that I don't know if it needs to be changed at all. I was just thinking, as the gearcase is open now, if it were good to change the driveshaft seal as well, but maybe I don't do it.

 

[racerone]

???-----Some love to argue.-----If (a big if ) the oil seals are original they need to be replaced.----These gearcases are not robust.-----Parts are expensive if available !-----Good used gearcases are at a premium.

 

[Mikko]

evinrude 55 shift rod o-ring - Google Search

 

[Mikko]

I am replacing the drive shaft oil seals and found these numbers in the old one. The last two numbers are strange and as far as I know they should be 66 (#321466)? Numbers are very small to read, but this is what I got. Any experience on this part number?

 

[racerone]

The 66 is backwards in the mold.---Install 321466

 

[Mikko]

I was wondering what is the purpose of those three slots in this drive shaft cover? Another question concerns the metal parts (e.g. springs) of the aftermarket oil seals which are not stainless. Is it always so in the aftermarket parts as the original ones are stainless.

 

[ct1762@gmail.com]

I was wondering what is the purpose of those three slots in this drive shaft cover? Another question concerns the metal parts (e.g. springs) of the aftermarket oil seals which are not stainless. Is it always so in the aftermarket parts as the original ones are stainless.

i believe the oil slinger pushes oil up there at some pressure for the bearing. needs a path for the seal too. being a 15'' short shaft as racer said best bet is to get a good used gearcase housing as complete ones are like hens teeth and very expensive and still a crap-shoot

 

[Mikko]

What about the use of any sealing compound in new oil seals and gaskets, I'm not in favor?

 

[ct1762@gmail.com]

What about the use of any sealing compound in new oil seals and gaskets, I'm not in favor?

as the manual says, yes a thin layer of sealer on the outside of seal and grease on inner

 

[Mikko]

I used Permatex Form-A-Gasket 3 for oil seals, it seemed to overflow a bit to innner side while pressing seals in. I tried to clean the extra sealant and "lubricate" it with water resistant grease. Does this sealant tend to harden the seals?

 

[Mc Tool]

One thing to remember , specially if working on older stuff . There may be a modern alternative to the factory recommended sundries .

 

[ct1762@gmail.com]

I used Permatex Form-A-Gasket 3 for oil seals, it seemed to overflow a bit to innner side while pressing seals in. I tried to clean the extra sealant and "lubricate" it with water resistant grease. Does this sealant tend to harden the seals?

? your just putting a tiny bit on the outer metal (or newer type hard plastic) casing. the rubber lip just gets a smear of grease of your choice. heck i've used light oil in a pinch wont matter one bit. it sounds like your saying your mixing grease with permatex #3?

 

[Mikko]

I would not call it mixture of grease and Permatex, but after carefully cleaning extra sealant from rubber lips, I oiled the lips to keep them flexible. I was just wondering whether Permatex hardens the rubber parts or not. I think Permatex is same as OMC, Evinrude / Johnson gasket sealing compound.