Re Combi slipping.

[utupua4]

Thanks Wilhelm, Chris and others,

I am inclined unfortunately to agree with Wilhelm. The shaft has
slipped off it's key and has moved back at least 1 inch. Here the
situation today. I went to the boat and experimented with the
combi. I was able to feather the engine into forward in the
following manner. Removing the cable from the operating lever
and removing the cam from the oposite side I was able to control
engine speed as I pushed the lever approx 20 degrees beyond
its normal range. When I manually let the engine rev I noticed
that I had sucessfully feathered the prop into Its forward position.
I reattached the accellerator cam in the new position, reflecting
that neutral was now at 2:30 as opposed to 12:00 on the cockpit
control arm.
Thus by advancind the contol lever 20 degrees beyond it normal
position resulting in the control sleeve moving back an extra inch
or so engages forward motion.

The diver who released the dockline suggested 2 things.
1. The line was not seriously fouling the prop.
2. The line had wrapped itself tightly around the shaft between
the propellor hub and the hull. He had some difficulty removing it.
It was COLD, too.

Thus I am inclined to believe the drive shaft has thrown its key
and shifted a small amount towards the stern of the boat. The
control sleeve and the mechanism operate properly as the
combi was greased I have visually confirmed the above.

Wilhelm, That magical little door where the shaft enters the
engine, does it exist on the MD6A. If so, the solution may be to
put the driveshaft back in it's original position......by force ....if
necessary!

Best Regards
Antonio

 

[wxt8981]

Antonio:

I didn't have an MD6A engine, hence I don't know what these
doors look like (there should be 2 doors, one left, the
other on the right side)

You need to loosen the bolts holding (fasten) the shaft,
find the key. put the key into the groove, and then push
the whole assembly (prop, shaft, sleeve) forward. It can be
done when in the water, but because you and the other
person at the prop need to communicate (to line up the key
on both sides of the two grooves- one on the shaft, the
other whatever comes from the engine)- it's done much
easier outside. But then, miracles happen all the times-
I've never done it in the water, I've done it when the boat
was hauled.
When the shaft is in the correct position, don't forget to
fasten the two bolts holding the shaft.

If you find any water that came into the boat from between
the sleeve and the shaft- take the boat out get all
O-rings; they cost very little, but you'll be thanking me
for that!

Wilhelm, V-257

 

[chris20636]

Antonio,

If you haven't already seen it, go to the AlbinVega Yahoo group site
and look in the files section. There is a file called "Combi
Instruction.pdf" or something close to that. It is a PDF file so you
will need acrobat reader to view it. It has instructions and
exploded view on taking the combi apart.

I have the whitworth wrenches, mentioned in the article, for
loosening the clamp nuts. I also had a small plate of 1/4" steel
made with holes drilled to match the hole pattern of the boss holding
the shaft. I positioned the plate over the end of the shaft and put
bolts through the plate and boss. By tightening the bolts, this
pressed the shaft back into the boss. If you can't find the right
tools, or can't get the shaft to move through the collar, send me an
email offline, and I could ship the items to you, to borrow.

Chris
V2933 Renee
Solomons, MD, USA