QD16 Restoration

[Steve D]

Jeff, If you do end up seeing evidence of a bad seal on the underside of the armature plate and up onto the points and need to replace the seal, then no, you don’t have to crack the case to get at it. But as you probably know the carbon seals are very fragile, so you have to proceed with caution to avoid breaking it.

I’ve had the best success with a drop or 2 of 2 stroke oil in between the o-ring and crank to make things a little more slippery, then with 2 dental picks in the cutouts of the carbon seal, facing opposite directions, BEFORE starting to pull up, GENTLY start to use a back and forth twisting motion on the seal until it starts to free up and will rotate on the crank more easily. Then you could start to very GENTLY and slowly try to work your way up and out. I’ve broken a few being impatient and not using some lubricant first to free things up.

[Crowsbeak]

Thanks for the clarification and great advice!!

I have the armature plate off for my ignition rebuild but couldn’t tell by looking if the carbon seal was able to be removed .

I’m assuming this can be checked for leaks with soapy water  and turning the crank with a wrench and looking for bubbles similar to a lip seal?

I would prefer to check and address when the ignition is off if possible.

1954 Evinrude 7.5 HP
1954 Evinrude 15 HP
1954 Gale 12 HP
1955 Johnson 10 HP
1956 Johnson 10 HP
1956 Gale 12 HP
1956 Evinrude 5.5 HP
1958 Johnson 7.5
1960 Evinrude 18 HP
1973 Johnson 6 HP

[Steve D]

I know Mumbles posted that nice video of checking for leaks on a lip seal and I’ll GUESS the same might be true for this.

I know “if it ain’t broke don’t fix it” but you could also save yourself the hassle of tearing into again by doing it now while you’re right there. That o-ring is old and it ain’t gonna last forever and as soon as you get it running, if you see evidence of it leaking you’ll wish you did it now. I think you’re smart for saying you want to address it now while the ignition plate is off.

[fleetwin]

Was the mag plate oily/fuel oil residue when you pulled the flywheel off?  If not, it seems safe to assumed there are no issues.  Always a good idea to replace the carbons seal oring, but you need to be careful.  One way to be sure you won’t break it is to find/order/have on hand a new one “just in case”…

[Crowsbeak]

Fleetwin, it was grimey and definitely needed a good cleaning. Some of it I think was some old hardened grease.

Based on all the good advice my plan is to hit it with soapy water and if no bubbles leave well enough alone.  If I see bubbles I will proceed with caution!

I’ll report back what I discover.

1954 Evinrude 7.5 HP
1954 Evinrude 15 HP
1954 Gale 12 HP
1955 Johnson 10 HP
1956 Johnson 10 HP
1956 Gale 12 HP
1956 Evinrude 5.5 HP
1958 Johnson 7.5
1960 Evinrude 18 HP
1973 Johnson 6 HP

[Crowsbeak]

Well ,unfortunately bubbles every revolution of crank😢  Looks like Carbon Seal coming off.   Will I be able to match up and use a standard English buna  N o ring or is the 301967 a special size?

 

1954 Evinrude 7.5 HP
1954 Evinrude 15 HP
1954 Gale 12 HP
1955 Johnson 10 HP
1956 Johnson 10 HP
1956 Gale 12 HP
1956 Evinrude 5.5 HP
1958 Johnson 7.5
1960 Evinrude 18 HP
1973 Johnson 6 HP

[Steve D]

I’ve never found one in those kits Jeff. Once I tried one I thought would work and it failed. Since then I’ve always bought a few of the originals at a time just to have on hand. Sometimes you can find a better deal if you buy from a guy on ebay who’s selling 3 or 4 as a lot. And of course there’s MarinEngine. Right now on ebay there’s a carbon seal available for $14.99 which isn’t a bad price.

https://www.ebay.com/itm/325834371814

[Crowsbeak]

Thanks again Steve!   I figured that was the case with the O-rings but never hurts to ask.  I will get a couple ordered.   I also  appreciate the eBay listing, like fleetwin stated earlier I’ll get one on hand to make sure I don’t need it😉I’ll report back on how the seal comes off.

1954 Evinrude 7.5 HP
1954 Evinrude 15 HP
1954 Gale 12 HP
1955 Johnson 10 HP
1956 Johnson 10 HP
1956 Gale 12 HP
1956 Evinrude 5.5 HP
1958 Johnson 7.5
1960 Evinrude 18 HP
1973 Johnson 6 HP

[crosbyman]

see bible johnson manual  page 266     re: QD crankshaft seal … new carbon seal design

Joining AOMCI has priviledges 🙂

[Crowsbeak]

Thanks for the heads up Crosbyman!   It’ll be interesting to see which version is in my QD.  anyone know what year the update was made?

I  bought the one Steve  recommended above which looks like it is the updated version so if I’m lucky and the existing comes out in one piece I will make sure it is the updated one.  If not the new one will go in.

1954 Evinrude 7.5 HP
1954 Evinrude 15 HP
1954 Gale 12 HP
1955 Johnson 10 HP
1956 Johnson 10 HP
1956 Gale 12 HP
1956 Evinrude 5.5 HP
1958 Johnson 7.5
1960 Evinrude 18 HP
1973 Johnson 6 HP

[Author]

Posts