Reply To: TD20 Driveshaft Seal – Any experience with removal?

[John Gragg]

So I thought I would update everyone on this really quick.

I was looking to find out if there was a sleeve or cup or something other that fit into the driveshaft well, and that the 41-62 (Sierra 18-2032) fit into.

I asked because once I pulled the old seal from my TEST gearcase, I was certain (I was WRONG) there was something either left behind by the original seal (GARLOC) or a sleeve that the seal fit into. Yes, even though the parts diagram does not show it, that’s what it looked like to me.

The TEST gearcase is not suitable for a couple of reasons we won’t go into.

I got up the courage to pull the GOOD gearcase apart and removed the seal. (CR 307563) I knew something was wrong, but couldn’t put my finger on it. The old seal popped right out, almost no damage. Unusual as heck.

See pics below. Someone installed a 2nd seal on top of the original, when they couldn’t get the original out. So I pulled that seal as well.

Here is where my answers came. This time I took a really good look (and a barrel brush for a 16 gauge shotgun) at the driveshaft tube and saw that what looked like a lip or sleeve was just buildup of old crud. I used a little PB and the brush on the end of a long brush shaft (on my cordless drill) and gently cleaned the heck out of the cylinder where the seal goes.

Installed a new seal with a tiny amount of Ultra Black around the rim and Viola’!  (Based on an old thread I found from Buccaneer I ordered the seals from Grainger. Its a 4985 I believe? I went with it because it is exactly the same as the 18-2032, except it is taller (by a little). I’m going to be resealing the prop shaft also so I want the depth to be there like the original as much as possible.

So, there it is for future reference. I should have known, but at least now I do know.

I knew the part numbers, I knew how to pull the seal (I was asking for a better way) and now I know the answers.

 

Thanks,

John Gragg
RIverside, CA

Just starting in the hobby, please be patient.

48 Sea King 5hp GG9014A. Sold
49 Sea King 5hp GG9014A
48 Johnson TD20. Sold
49 Johnson TD20. Sold
54 Johnson QD15. Sold
55 Johnson CD12. Sold
57 Johnson RJE-19M
57 Johnson RDE-19