I recently bought a pontoon with a 1996 25hp mercury.
Motor starts but no water came out hole.
I shut off immediately. Replaced water pump impeller. Still starts fine
but no water out of hole, only some blue smoke. There appears to be some
bubbling coming up from prop area while motor is running.
I blew thru lines prior to replacing impeller. Motor has spent a fair
amount of time with lower unit in water. There was some scum on leg. This
motor has been fresh water use only.

Any ideas????

"mike olson" wrote in message
...
I recently bought a pontoon with a 1996 25hp mercury.
Motor starts but no water came out hole.
I shut off immediately. Replaced water pump impeller. Still starts fine
but no water out of hole, only some blue smoke. There appears to be some
bubbling coming up from prop area while motor is running.
I blew thru lines prior to replacing impeller. Motor has spent a fair
amount of time with lower unit in water. There was some scum on leg.
This
motor has been fresh water use only.

Any ideas????

Plugged pee hole.

mike olson wrote:

I recently bought a pontoon with a 1996 25hp mercury.
Motor starts but no water came out hole.
I shut off immediately. Replaced water pump impeller. Still starts fine
but no water out of hole, only some blue smoke. There appears to be some
bubbling coming up from prop area while motor is running.
I blew thru lines prior to replacing impeller. Motor has spent a fair
amount of time with lower unit in water. There was some scum on leg. This
motor has been fresh water use only.

Any ideas????



Clear the tell-tale line & fittings w/ fine wire, maybe an aerosol
cleaner. It's not unusual for it to get blocked by sand, or other small
matter.

The tell-tale is not an absolute indicator of cooling performance. Hook
up a flush-muff and check for proper operation that way.

Rob

Frequently mud dauber insects delight in plugging up the sprew hole. A
tooth pick, small nail, piece of wire, etc will usually clear the hole.

The only purpose of this water outlet is to give you a visual indication
that the water pump is working correctly. If it is plugged, it will not
affect the cooling of the engine. Naturally it would be best to clear it,
so you can observe your water pump working correctly.

Don Dando




"mike olson" wrote in message
...
I recently bought a pontoon with a 1996 25hp mercury.
Motor starts but no water came out hole.
I shut off immediately. Replaced water pump impeller. Still starts fine
but no water out of hole, only some blue smoke. There appears to be some
bubbling coming up from prop area while motor is running.
I blew thru lines prior to replacing impeller. Motor has spent a fair
amount of time with lower unit in water. There was some scum on leg.
This
motor has been fresh water use only.

Any ideas????

"mike olson" wrote in message ...
I recently bought a pontoon with a 1996 25hp mercury.
Motor starts but no water came out hole.
I shut off immediately. Replaced water pump impeller. Still starts fine
but no water out of hole, only some blue smoke. There appears to be some
bubbling coming up from prop area while motor is running.
I blew thru lines prior to replacing impeller. Motor has spent a fair
amount of time with lower unit in water. There was some scum on leg. This
motor has been fresh water use only.

Any ideas????

Blue smoke coming out of telltale hose is not a good sign. There is an
internal pipe that proceeds up the foot of the motor and connects to the
water pump. This pipe may not have seated into the top of the water
pump when reassembled.

CN