On Sun, 16 Mar 08, Frank wrote:
I made sure the water level in the barrel was well
above the water intake.

Make sure it's higher than the impeller. There's no mark on the
outside of your lower unit indicating where it is, you'll just have to
estimate. But some impellers won't suck up water if they're above
water level.
Second thing, remove the thermostat. It might be stuck closed. It
won't hurt to run the engine without it. If that's the problem, you
can replace it later.

Rick

Should still be a very small amount of water flow even if stuck closed .
There is a small bypass hole to allow a small trickle to pass. I would
recheck the pickup tube from the impeller housing to the power head to make
sure it's plugged in properly at both ends.
Jim
wrote in message
...
On Sun, 16 Mar 08, Frank wrote:
I made sure the water level in the barrel was well
above the water intake.

Make sure it's higher than the impeller. There's no mark on the
outside of your lower unit indicating where it is, you'll just have to
estimate. But some impellers won't suck up water if they're above
water level.
Second thing, remove the thermostat. It might be stuck closed. It
won't hurt to run the engine without it. If that's the problem, you
can replace it later.

Rick

On Mar 16, 4:53*pm, "Jim Northey" wrote:
Should still be a very small amount of water flow even if stuck closed .
There is a small bypass hole to allow a small trickle to pass. I would
recheck the pickup tube from the impeller housing to the power head to make
sure it's plugged in properly at both ends.
wrote in message

...



On Sun, 16 Mar 08, Frank wrote:
I made sure the water level in the barrel was well
above the water intake.

Make sure it's higher than the impeller. There's no mark on the
outside of your lower unit indicating where it is, you'll just have to
estimate. But some impellers won't suck up water if they're above
water level.
Second thing, remove the thermostat. It might be stuck closed. It
won't hurt to run the engine without it. If that's the problem, you
can replace it later.

Rick- Hide quoted text -

- Show quoted text -


Thanks for everyone's suggestions. I tried again. This time bringing
the water level in in barrel as high as possible, making sure it was
well above the water impeller. Same thing, no water is expelled. I'm
going back to take apart the powerhead and see if anything is blocked
there. Though, there is no thermostat on the Merc 3.3hp as far as I
know. Again, thanks everyone.

Rick, Jim, or anyone else,
Wouldn't the same volume of water flow thru the pump and out the discharge
(part of which would be indicator stream) regardless of the state of the
thermostat ? I had assumed the thermostat merely diverted cooling water to
the powerhead , as needed. I don't know for sure, but would like to know, if
someone can say.
A few years back, my first ebay purchase was for a kit to force a regulated
amount of fresh water back thru the "pee tube" to flush out the outboard
motor. At the time, i was skeptical whether this would flush out more than
just the water pump, but figured what the heck.
I'm still skeptical, so would appreciate it if someone who is familiar with
these cooling system could tell me.

wrote in message
...
On Sun, 16 Mar 08, Frank wrote:
I made sure the water level in the barrel was well
above the water intake.

Make sure it's higher than the impeller. There's no mark on the
outside of your lower unit indicating where it is, you'll just have to
estimate. But some impellers won't suck up water if they're above
water level.
Second thing, remove the thermostat. It might be stuck closed. It
won't hurt to run the engine without it. If that's the problem, you
can replace it later.

Rick

The thermostat is in a small housing that the discharge hose is attached to
so it's kind of like closing a valve on you garden hose, water pressure is
still there but can't get out. So if the stat is stuck shut all the impeller
is doing is churning water with a small dribble ...( much like a 90 year old
guy peeing) coming out the discharge tube. The rest stays in the block
getting hotter. Now this is all in relation to a 25 hp merc but I've seen
and worked on some of the smaller and larger 2 strokes and they have been
basically the same. If there is a stat housing it will be a noticeable part
bolted onto the powerhead with a 90 deg fitting threaded into it. If its an
earlier model, early 90's or before if I remember right, the fitting is
threaded into the block , no extra bolt on housing. That style will not have
a stat. Now as Rick said the quickest way to tell if the stat is stuck, is
to take it out and try it. If still no flow then the feed tube inside the
leg may not in position at the powerhead or at the impeller end. That tube
can be a bitch at times to get in place as your working almost blind and buy
feel. Another problem may be the key that locks the impeller to the
driveshaft. I've forgotten that a time or two but usually notice it sitting
on the bench before it's all back together :-) Other than that the only
other thing I can think of is it may have a massive blockage of mud or
whatnot in a 2 part sandwich kind of part that is one side coolant flow and
the other side exhaust flow. It's at the back of the block on what would be
a cars driver side.
Jim
"Garland Gray II" wrote in message
...
Rick, Jim, or anyone else,
Wouldn't the same volume of water flow thru the pump and out the discharge
(part of which would be indicator stream) regardless of the state of the
thermostat ? I had assumed the thermostat merely diverted cooling water to
the powerhead , as needed. I don't know for sure, but would like to know,
if someone can say.
A few years back, my first ebay purchase was for a kit to force a
regulated amount of fresh water back thru the "pee tube" to flush out the
outboard motor. At the time, i was skeptical whether this would flush out
more than just the water pump, but figured what the heck.
I'm still skeptical, so would appreciate it if someone who is familiar
with these cooling system could tell me.

wrote in message
...
On Sun, 16 Mar 08, Frank wrote:
I made sure the water level in the barrel was well
above the water intake.

Make sure it's higher than the impeller. There's no mark on the
outside of your lower unit indicating where it is, you'll just have to
estimate. But some impellers won't suck up water if they're above
water level.
Second thing, remove the thermostat. It might be stuck closed. It
won't hurt to run the engine without it. If that's the problem, you
can replace it later.

Rick

On Sun, 16 Mar 2008 15:19:08 -0500, lid wrote:

I made sure the water level in the barrel was well
above the water intake.

Make sure it's higher than the impeller. There's no mark on the
outside of your lower unit indicating where it is, you'll just have to
estimate. But some impellers won't suck up water if they're above
water level.

Second thing, remove the thermostat. It might be stuck closed.

I don't believe in coincidence. The thermostat wouldn't stick closed
at the exact time you dropped it over the side.

won't hurt to run the engine without it. If that's the problem, you
can replace it later.

Casady

On Mar 18, 9:14*am, (Richard Casady)
wrote:
On Sun, 16 Mar 2008 15:19:08 -0500, wrote:
I made sure the water level in the barrel was well
above the water intake.

Make sure it's higher than the impeller. There's no mark on the
outside of your lower unit indicating where it is, you'll just have to
estimate. But some impellers won't suck up water if they're above
water level.
Second thing, remove the thermostat. It might be stuck closed.

I don't believe in coincidence. The thermostat wouldn't stick closed
at the exact time you dropped it over the side.

won't hurt to run the engine without it. If that's the problem, you
can replace it later.

Casady


I took the powerhead off the Merc 3.3hp engine tonight and followed
the entire cooling system throughout, checking for any blockages.
There was none. I also discovered there is no thermostat on the 3.3
hp. I didn't think there was, but I'm a rookie with engine repair so I
wasn't sure.
When I opened up the powerhead I found plenty of fresh water still
not dried out. Indicating to me that the powerhead was getting cooling
water but for some reason it just wasn't coming out the water pump
indicator hole. Which I did clear out with wire when I was trying to
run the engine in my back yard. Everyones suggestions on these posting
I did check out. Still nothing. This is the damnedest thing.

On Tue, 18 Mar 2008 16:24:06 -0700 (PDT), Frank
wrote:

On Mar 18, 9:14*am, (Richard Casady)
wrote:
On Sun, 16 Mar 2008 15:19:08 -0500, wrote:
I made sure the water level in the barrel was well
above the water intake.

Make sure it's higher than the impeller. There's no mark on the
outside of your lower unit indicating where it is, you'll just have to
estimate. But some impellers won't suck up water if they're above
water level.
Second thing, remove the thermostat. It might be stuck closed.

I don't believe in coincidence. The thermostat wouldn't stick closed
at the exact time you dropped it over the side.

won't hurt to run the engine without it. If that's the problem, you
can replace it later.

Casady


I took the powerhead off the Merc 3.3hp engine tonight and followed
the entire cooling system throughout, checking for any blockages.
There was none. I also discovered there is no thermostat on the 3.3
hp. I didn't think there was, but I'm a rookie with engine repair so I
wasn't sure.
When I opened up the powerhead I found plenty of fresh water still
not dried out. Indicating to me that the powerhead was getting cooling
water but for some reason it just wasn't coming out the water pump
indicator hole. Which I did clear out with wire when I was trying to
run the engine in my back yard. Everyones suggestions on these posting
I did check out. Still nothing. This is the damnedest thing.


Well, if there isn't any water coming out the bleed hole then
something is wrong. The only solution is to start from the bottom and
work up.

I have had this symptom and went through all the hassles of reaming
out holes and so on. In my case when I finally pulled the leg I found
that several fingers were broken off the water pump impeller. I was
also able, once, to install the impeller without the key (doesn't work
either). I sympathize with you but the engine is so simple that it
should be easy to locate.




Bruce-in-Bangkok
(correct email address for reply)

Bruce in Bangkok wrote:
On Tue, 18 Mar 2008 16:24:06 -0700 (PDT), Frank
wrote:

On Mar 18, 9:14 am, (Richard Casady)
wrote:
On Sun, 16 Mar 2008 15:19:08 -0500, wrote:
I made sure the water level in the barrel was well
above the water intake.
Make sure it's higher than the impeller. There's no mark on the
outside of your lower unit indicating where it is, you'll just have to
estimate. But some impellers won't suck up water if they're above
water level.
Second thing, remove the thermostat. It might be stuck closed.
I don't believe in coincidence. The thermostat wouldn't stick closed
at the exact time you dropped it over the side.

won't hurt to run the engine without it. If that's the problem, you
can replace it later.
Casady

I took the powerhead off the Merc 3.3hp engine tonight and followed
the entire cooling system throughout, checking for any blockages.
There was none. I also discovered there is no thermostat on the 3.3
hp. I didn't think there was, but I'm a rookie with engine repair so I
wasn't sure.
When I opened up the powerhead I found plenty of fresh water still
not dried out. Indicating to me that the powerhead was getting cooling
water but for some reason it just wasn't coming out the water pump
indicator hole. Which I did clear out with wire when I was trying to
run the engine in my back yard. Everyones suggestions on these posting
I did check out. Still nothing. This is the damnedest thing.


Well, if there isn't any water coming out the bleed hole then
something is wrong. The only solution is to start from the bottom and
work up.

I have had this symptom and went through all the hassles of reaming
out holes and so on. In my case when I finally pulled the leg I found
that several fingers were broken off the water pump impeller. I was
also able, once, to install the impeller without the key (doesn't work
either). I sympathize with you but the engine is so simple that it
should be easy to locate.




Bruce-in-Bangkok
(correct email address for reply)

I have a Honda 8 HP. There is a hose from the engine to the
"P" hole at the back of the cover. With out that hose the water
would run down the front of the shaft, but you wouldn't see it.
Maybe there is water flowing through your motor but its not
coming out where you expect.

LdB

On Wed, 19 Mar 2008 22:54:40 -0500, L D'Bonnie wrote:

Bruce in Bangkok wrote:
On Tue, 18 Mar 2008 16:24:06 -0700 (PDT), Frank
wrote:

On Mar 18, 9:14 am, (Richard Casady)
wrote:
On Sun, 16 Mar 2008 15:19:08 -0500, wrote:
I made sure the water level in the barrel was well
above the water intake.
Make sure it's higher than the impeller. There's no mark on the
outside of your lower unit indicating where it is, you'll just have to
estimate. But some impellers won't suck up water if they're above
quite a lot snipped

Well, if there isn't any water coming out the bleed hole then
something is wrong. The only solution is to start from the bottom and
work up.

I have had this symptom and went through all the hassles of reaming
out holes and so on. In my case when I finally pulled the leg I found
that several fingers were broken off the water pump impeller. I was
also able, once, to install the impeller without the key (doesn't work
either). I sympathize with you but the engine is so simple that it
should be easy to locate.




Bruce-in-Bangkok
(correct email address for reply)

I have a Honda 8 HP. There is a hose from the engine to the
"P" hole at the back of the cover. With out that hose the water
would run down the front of the shaft, but you wouldn't see it.
Maybe there is water flowing through your motor but its not
coming out where you expect.

LdB

On the 3 HP there is a fitting on the side of the block and a plastic
hose connects to that and exits at the rear of the plastic engine
housing.

I hope the guy was doing his trouble shooting with the covers off.


Bruce-in-Bangkok
(correct email address for reply)