Newbie Help!, Prop won't turn when in the water
Thomas Ruark
forward or reverse when in the water. Her dad and I are now trying to
diagnose the problem, on dry land, and could use some help.
We put the boat in gear and turn the prop and can hear the gears turning
in the outdrive, forward and reverse. Should we be able to turn the prop
at this point? If I am in gear aren't I directly turning the engine at
this point? I am not super man ya know.
My sources so far tell me it is the prop or a rubber coupler at the
engine/outdrive connection. I bought the repair manaul last night and
can see no discussion of this rubber coupler from the engine to the
outdrive. How do I get to this coupler? Remove the outdrive? Remove the
engine? What is the connection from the engine to the outdrive? It looks
like a direct shaft but the manual gives no details at this point.
Please help. All the boat repair shops are full in my area and I have a
house boat rented for next weekend.
Thanks in advance.
Tom Ruark
tru...@adobe.com
Thomas Ruark
Inboard 1986 Merc V6 with an Alpha outdrive.
Marshfield Mass.
engine should be turning. if the prop turns but the driveshaft doesnt, the
props hub is spun. if the driveshaft moves but the engine doesnt, the engine
coupler is defective. to replace coupler, sterndrive must be removed and
engine must be moved forward or removed.
--
Jim Clark
Custom Yacht Services
Marshfield, Massachusetts
(EMAIL) custom-yac...@worldnet.att.net
(WEB PAGE) http://home.att.net/~custom-yacht-services
Thomas Ruark wrote in message <35B62C...@adobe.com>...
JJames915
The 2nd is on the engine where the shaft from the outdrive connects to the
flywheel. (this presumes you are working on an i/o) You can usually just
see/reach the shaft as it goes into the flywheel. You could turn the prop in
gear and see if the shaft turns at the back of the engine. Be aware that some
outdrives like merc alphas the gears are only engaged in one direction at a
time. In other words they will skip if you turn the opposite way even in gear.
Try turning both ways.
JJames915
removing both the out drive and the engine on many boats.
Browrg
or stay put
hidda
>
> I forgot some details.
>
> Inboard 1986 Merc V6 with an Alpha outdrive.
Hold on everybody. Before you have this guy pulling the engine and leg
there are a few things to check first.
Tom, is the engine overheating? In other words, when you attach the ear
muffs to flush the engine, does the water flow through the engine and
out the exhaust? If the water does flow out, then that means at least
the parts above the lower gear case are operating. Remember, the Alpha
leg has the raw water pump IN the leg. If the u-joint or the engine
coupler is bad, then the guts of the leg may not turn, thus the pump
will not pump the water up to the engine to cool it off.
Regarding the coupler, I don't believe it will fail so badly that it
will not turn the leg at all. If it did, then you should hear a racket
at the transom shield area. Also, if the u-joint failed, chances are,
parts would have been flying around and would have torn up the bellows,
or at least you should again be hearing a racket back there.
At any rate, if the water is pumping through the leg, but it does not
spin the prop when in gear, then the dog clutch is not being activated
and it's staying in neutral. Check the shift cable to make sure it is
working and it is activating the shift in the leg. If the cable is
working, then the problem is in the lower gear case and that will
probably have to be removed, assuming the shift linkage INSIDE the leg
is operational.
If you can spin the prop easily in either direction while the shift is
in either forward or reverse, it definitely is not a spun prop. I've
had spun props and if you can turn it by hand and make the hub slip,
then the damage to the rubber insert will be quite obvious. That means
the prop is barely hanging on and should be wobbling. Otherwise, even
if you spin a hub, it will still have enough bite left for you to limp
home at low rpms. I don't believe you can easily spin a spun prop
around the hub with your hands. I've never been able to. So, I don't
believe this boat has a spun prop according to the symptoms. If the
prop is spun and you can spin it by hand, put the leg in gear and spin
the prop in both directions. The center hub should spin in only one
direction. If it spins in both directions with shift in gear, then
problem is not the prop.
So, bottom line is, if the water pump in the leg is operating normally,
then the leg is either not going into gear, or the shaft/gears/clutch
below the water pump is not operating normally. This could be caused by
bad shifter at the helm, bad shift cable, bad linkage at the transom,
bad linkage in the leg, or busted gears/clutch in the lower gear case.
At any rate, if it's busted gears or busted internal shift linkage, it's
probably beyond your capabilities because it will require disassembly of
the leg. A good mechanic with a good shop manual and willing to follow
the Merc procedures could probably do the job himself.
If it is busted gears, then pull the oil drain plug and check the oil
for any metal pieces. If there is a magnet in the drain plug, it will
pick up any bits of broken gears. If no metal, then probably gears are
okay and you're back to shift cable or linkage problem.
Dennis
Thomas Ruark
Shaft turns at the prop. The prop is not wobbling and looks solid.
When I turn one direction I here the ratcheting of the gear, when I turn the other
direction I can here the gears turning up through the out drive. When I shift from
forward to reverse I get the opposite effect. This tells me that the shifting
mechanism is working. Correct?
We have two theories going at this time.
Theory One: Sis' was having troubles that day and the boat is fine. Hard to prove
when the boat is in the driveway.
Should I be able to turn the prop when in gear both directions?
I understand why it ratchets, because the way the gear is made, but the other
direction should not turn. Correct?
Does this test prove that my Sis' was _not_ having troubles and the boat is
broken?
I would like to avoid going back to the lake, dropping it in the water, and having
the same problem.
Theory Two: Coupler at the engine is broken.
Pull some covers off the engine/out drive mount and see the shafts/coupler in
question?
Do some more tests to prove the problem?
Thanks for your help.
Marshfield Mass.
--
Jim Clark
Custom Yacht Services
Marshfield, Massachusetts
(EMAIL) custom-yac...@worldnet.att.net
(WEB PAGE) http://home.att.net/~custom-yacht-services
Thomas Ruark wrote in message <35B773ED...@adobe.com>...
Kevin
This might sound real stupid-simple, but...
Does your throttle have a button right at the pivot where the handle goes
forward and backwards? This is used for priming the engine and increasing
the RPM for cold start ups WITHOUT allowing the prop to turn.
Check the button to make sure it's not stuck on the IN position!
Kevin
VDRJR
with the boat in forward, engine off, you simply have to readjust the shit
cable because as you said, the prop should not spin at this time. the cable is
not allowing the shift rod to full engage.
jim horgan
the props have a rubber slevr in them so if you hit somthing you dont damagr the
out drive or the gears or shafts, take it to a prop shop or prop recondisher to get
it checked out.
omar...@gmail.com
> My sister in law was the last to use the boat and said it wouldn't go in
> forward or reverse when in the water. Her dad and I are now trying to
> diagnose the problem, on dry land, and could use some help.
>
> We put the boat in gear and turn the prop and can hear the gears turning
> in the outdrive, forward and reverse. Should we be able to turn the prop
> at this point? If I am in gear aren't I directly turning the engine at
> this point? I am not super man ya know.
>
> My sources so far tell me it is the prop or a rubber coupler at the
> engine/outdrive connection. I bought the repair manaul last night and
> can see no discussion of this rubber coupler from the engine to the
> outdrive. How do I get to this coupler? Remove the outdrive? Remove the
> engine? What is the connection from the engine to the outdrive? It looks
> like a direct shaft but the manual gives no details at this point.
>
> Please help. All the boat repair shops are full in my area and I have a
> house boat rented for next weekend.
>
> Thanks in advance.
> Tom Ruark
> tru...@adobe.com
Tim
Wayne.B
>>> i need help my prop wont spin during flushing. Even if i put into gear. it makes sounds put no prop movement. Any suggestions. I have a 2006 mercury 75 2 stroke engine.
>>
>>I didn't know that M<Mercury still offered a 2 stroke in 2006, anyway....Does it work while launched? probably not. You might have a shift linkage broken or out of adjustment. What kind of a 'sound' does it make while this is going on?
>
>a 50.
>
>My question to the OP is "did you work on this before it broke" (drop
>the foot)
>It sounds like the coupler in the shifter is not connected.
>The default position if the shift cam fell off is forward so the cam
>is there or the shift bullet is jammed. If that is the case, it will
>not shift into reverse.
>With the dog at the limit of the spring, you are in forward. The cam
>pushes it back to neutral and then reverse.
>This is either a rotating cam or a vertical sloping cam. I think all
>of the 75/90s use the rotating cam design. The 50 my buddy has uses
>the vertical cam. My 75 used the rotating cam.
>
>Of course there might be something buggered in the foot. You are going
>to see a bearing carrier puller if that is true. (generally not fun).
===
Your expertise in these matters never ceases to amaze me. :-)
Welcome back.
Wayne.B
>I loved New Zealand. It is amazing. Just a short trip through the
>Panama canal and you are sailing the right ocean. Go on down next
>winter. It is better than the Cape. Just be sure to take plenty of
>money. It is a pretty spendy place.
===
We're going through the canal later this year on a big sailing cruise
ship but that's as far as we go. Looking forward to it. I spent some
time in the Panama Canal Zone as a little kid and have never been
back.