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  HELP!!! Can I epoxy my lower unit?

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Author Topic:   HELP!!! Can I epoxy my lower unit?
Duncan posted 03-08-2002 07:33 PM ET (US)   Profile for Duncan   Send Email to Duncan  
Just busted off a small piece of the sceg on my 1980ish Merc 40. Was bent. Tried to bend it back with a Cresent wrench...Jackass, I know!

It's a small "right" triangle off the fin including the back corner and 2" forward and 3/4" back. Th front part of the original bottom of the fin is there and protrudes "below" the circumference of the spinning prop.

A) Can I epoxy? (JB Weld or Maring tex)
B) Can I have It welded (TIG or MIG)
C) Should I get a "sceg guard"?
D) Start calling junkyards?
E) Clean out kid's college fund and buy new Honda four stroke?
F) If you say "E" can I live at your place til the wife cools down?

Duncan posted 03-08-2002 07:35 PM ET (US)     Profile for Duncan  Send Email to Duncan     
Correction: 2" forward and 3/4" UP
JBCornwell posted 03-08-2002 07:52 PM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
Howdy, Duncan.
No, yes, yes, no, no, no.

I would go with a SkegGard for about $100. Have them on both Montauks and will add one to the Outrage.

Red sky at night. . .
JB :)

JBCornwell posted 03-08-2002 07:54 PM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     


Red sky at night. . .
JB :)

NEVER SCARED posted 03-09-2002 02:49 PM ET (US)     Profile for NEVER SCARED    
One day while bass fishing, by anti-cavitation plate ended up on top of a submerged branch. When my friend went near the transom to get it free, I heard a terrible "snap". I thought it was the branch. Lost the foward rounded part of the ACP. I taped a piece of cardboard to the area, placed plastic rap over the cardboard, then used Marine Tex to fill it in. Awesome repair! This .125 thick piece must be under a lot of pressure at wot and the repair is perfect 3 years later. I just wished I used the white color to match my Evinrude! Good stuff, but must get the 5 to 1 mixture correct. Mostly guess work.

Never scared

WSTEFFENS posted 03-09-2002 10:36 PM ET (US)     Profile for WSTEFFENS  Send Email to WSTEFFENS     

Find a compentent marine service centere. They can rebuild your lower unit to new conditon. I know as I design revised my 2 v6 cr rotating lower units last summer in the north channel of lake Huron. A good shop will take appart the lower unit send it out to a compentet shop and have the dammage repaired, then reassembled.

Cost for such a repair in N Mi. for two 150's w/ss props app $3000. TIR on one engine was .75" on the drive shaft. The prop was not dammaged more than a small dent in one of the blades. The wheel was tuffer than the gear case.


triblet posted 03-10-2002 07:38 PM ET (US)     Profile for triblet  Send Email to triblet     
It probably isn't a problem to just keep
running it. I see lots of outboards with a
chunk out of the skeg. I've even managed
to grind mine down a touch. ;-)

They should be able to weld it back on. They
will probably fall over in shock when you
hand them the broken off piece. And it will
be cheaper. Without the broken off piece,
they have to cut it back to match a repair
piece that they then weld on. More labor,
and the cost of the repair piece.
repair piece. So far you haven't said
anything that indicates are lower unit
rebuild is in order, so it's not going to
cost anywhere near 3 grand.

Expect a little good-natured teasing from
the welder.


andygere posted 03-11-2002 03:13 AM ET (US)     Profile for andygere  Send Email to andygere     
You don't want to know what you'll be charged to have it welded. Clean up the rough edges with a file, touch up the paint and be done with it. If the remaining section of skeg is still bent, you can straighten it out if you heat it with a torch. Propane isn't hot enough, map gas or acetelene is. Be careful not to cook your seals or boil your lower unit oil, and bend a little at a time. A skeg gaurd will just add drag, and the skeg really does nothing but provide something other than the prop to hit bottom first. If your 80ish Merc 40 is anything like mine was, the last thing you want to do is spend money on a cosmetic repair. You'll have plenty of opportunities to spend money just to keep her running...
SteveC posted 03-11-2002 10:20 AM ET (US)     Profile for SteveC    
Although you could probably use it as is for a logn time, this would be really easy to Tig weld. (as long as there is some separation from the gears so as not to heat the seals too much.) I loaned one of my outboard motors to my brother in law and he brought it back broken. I took the paint off around the area, cleaned with scotchbright pad, welded it up. the whole process took about 1 hour (maybe a little more to get my nerve up). You would need to find a shop with an AC tig welder. You may be able to use gas, but I think this would put more heat into the part. I saw from your profile that you are in NJ, there are tons of places to have anything welded there.
Jerry Townsend posted 03-11-2002 10:43 AM ET (US)     Profile for Jerry Townsend  Send Email to Jerry Townsend     
Get your engine to a good TIG or MIG welder. There is no need to remove the engine from the boat. If you were closer, you could bring it over. A commercial welding outfit will charge you something less than $100. DO NOT use gas and try to do it yourself.-------- Jerry/Idaho
vdbgroup posted 03-12-2002 12:31 AM ET (US)     Profile for vdbgroup  Send Email to vdbgroup     
Second - Jerry of Idaho.

Also, Bob's Machine Shop in Ruskin, FL will do the repair. Ship him your lower unit.

Duncan posted 03-12-2002 10:21 AM ET (US)     Profile for Duncan  Send Email to Duncan     
Thanks all!
If I take the lower unit off I now know where to get a junkyard one. Ain't gonna happen. I'll just sell it before I put that kind of effort into it.
Frankly, I hate this damn motor. I was advised by someone on this forum not to buy this model of motor and I did anyway. A "good deal" usually isn't.
Bigshot posted 03-13-2002 10:31 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
You guyys are getting outa control....shipping to Bob's? Slap some epoxy on there and if she falls off....look into it again. FYI: Skeggards rule.

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