| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1077.1 | Call Rick.. | MKOTS3::RONEY | | Mon Jul 19 1993 10:53 | 5 |
|
Sounds like it's time to call Rick Wilson.....
Bob
|
| 1077.2 | doesn's just slide off | ROBOAT::HEBERT | Captain Bligh | Mon Jul 19 1993 10:59 | 27 |
| I'm not familiar with your particular engine. I have pulled lower units
off OMC engines, though.
There is a shift shaft that runs from the power head down to the gearcase
in the lower unit which must be disconnected. On some engines you must
disconnect a bolt at the top end of this shift shaft (from the shifter
mechanism). On other engines there's an observation plate screwed onto
the side of the leg of the engine. You must remove that observation
plate, and upon peering inside you will see the shift shaft passing by,
and a connecting plate with two screws clamping the top half of the shift
shaft and the bottom half of the shift shaft.
Once everything is disconnected, the lower unit still doesn't just slide
off; some degree of force is required, because there are oil seals and
water seals. These involve the main drive shaft (between the crankshaft
that the gearcase), the water pump which sits on top of the gearcase, and
maybe even an exhaust conduit.
Not knowing your level of experience, I'll advise you that when you
finally pull the lower unit you might have this cast thing, roughly from
the cavitation plate down to the skeg, that has some very long stainless
steel parts sticking up that are 20" or so long. I'm telling you this
because many people expect to be holding just the lower unit in their
hands. The main drive shaft comes away with the lower unit, and so does
the shift shaft.
Art
|
| 1077.3 | Ayuh! Time to call Dr. OMC in Milford, NH | GLITTR::JOHNHC | | Mon Jul 19 1993 11:01 | 1 |
| .1 has it right!
|
| 1077.4 | drive shaft not clamped | ROBOAT::HEBERT | Captain Bligh | Mon Jul 19 1993 11:02 | 7 |
| By the way, once you disconnect the shift shaft, there's nothing else
holding it together. The drive shaft has a spline at the top which
matches up with the crankshaft, and that could be a tight fit. It's not
bolted or clamped, though, just a matchup between a splined shaft and
socket (maybe an O-ring to slide through).
Art
|
| 1077.5 | Stuck Spline | SALEM::GILMAN | | Mon Jul 19 1993 12:29 | 11 |
| My bet is that the spline which inserts into a mating female socket at
the bottom of the crankshaft maybe corroded. This would explain your
problem. Are you SURE you have the shift linkage disconnected? The
water pump pipe plugs into a rubber socket and probably isn't the
problem. My bet is its a corroded spline. How do you get it
apart if its corroded? I would take it to a pro because beating
on the lower unit will pound hell out of the engine bearings.
Rick isn't always around. I needed him too but couldn't raise him.
Jeff
|
| 1077.6 | Thanks so far... | BONNET::STRATMAN | Peter Stratman @VBO | Tue Jul 20 1993 14:46 | 58 |
|
Thanks for the advice I got so far...
I haven't called Rick, because I don't exactly live next door (this is from
Valbonne, France), and well, I don't feel too good about calling him, since
the chances I'll ever get him some real business are pretty slim, aren't
they ?
> problem. Are you SURE you have the shift linkage disconnected? The
> water pump pipe plugs into a rubber socket and probably isn't the
> problem. My bet is its a corroded spline. How do you get it
Well, the shift lever is off, and the vertical gear which slips onto that
is off. The horizontal gear which is on the gear shift shaft does
move up and down slightly on the shaft, but I can't actually get it
off because I can get no grip on it. This is what it looks like (in my
best line-art) :
||
|| Vertical Horizontal
Lever|| Gear | Gear
|| ____________ v | ____________
|| | | [- | | |
||-|----------|-[- v | |
||-|----------|-[-|||||| | |
| Lever | [-______ | |
| shaft ------||---- |
\ ||<- Gear shift shaft
\______ || _______/
| :: |
It doesn't look like anything except the vertical gear is used to keep the
little horizontal gear stuck on the shaft, and it DOES move on the shaft.
There is no bolt in sight, and no observation plate on the side on this
model.
I have seen the water pump pipe and the rubber socket. A good pull
should get that pipe out.
Remains the spline... The fact the the engine itself won't come off from
the top either seems to prove that it must be stuck to the main shaft...
What does the linkage like ? I can't remember from the last engine
I took apart. THAT engine was REALLY corroded EVERYWHERE but not
the main drive shaft. The power head came off really easily...
> .. I would take it to a pro because beating on the lower unit will pound
> hell out of the engine bearings.
Yeah, I've been pounding on the the thing way too much already for
comfort... I have to admit though that I'd really feel stupid taking a
fully unbolted engine to a repair shop though !! :^}
Thanks for your ideas, keep them coming if you have any others...
Peter.
(Hoping I'll get this fixed before winter comes...:^[ this is my MAIN and
ONLY engine!!!)
|
| 1077.7 | Cut it | SALEM::GILMAN | | Tue Jul 20 1993 15:50 | 13 |
| Hows' it going Peter? I know what you mean about taking a disassembled
engine to a repair shop. Embarrassing. This is an extreme idea but it
will work:
CUT the drive shaft.... with an oxyacetylene torch if necessary. THEN
you will be able to pull the cut shaft and engine off the lower unit.
You will be able to get AT the stuck shaft/spline and work on it.
The way it is now you have no access.
Yes, you will have to replace the driveshaft. Compared to a useless
engine you can't get apart I don't see an alternative, do you?
Jeff
|