Water flow question

[oakie]

Get no water flow from telltale. Inspect water pump and looks ok? When I blow air into telltale I can hear and feel some air flow around the pump discharge tube, but if I plug the pump discharge tube the air still flows?? Used inspection camera and may have a split tube. How difficult is it to remove and inspect??

 

[Dukedog]

good ta know what motor ya have???

 

[oakie]

Merc 850

 

[oakie]

Merc 850

1974 model I believe

 

[airshot]

Best to drop the leg and replace water pump and inspect the rest to be safe. If above your pay grade, find a service dept to do it for you.

 

[oakie]

Best to drop the leg and replace water pump and inspect the rest to be safe. If above your pay grade, find a service dept to do it for you.

THANKS, water pump replacement underway but I'm still thinking I need to inspect the water flow from pump to power head, the tube up through the drive shaft housing. Does that require removal of the power head??

 

[Chris1956]

The copper water tube fits into a rubber gromet at the base of the powerhead. It is hard to reinsert if it is pulled out, so do not do that unless absolutely necessary. You may need to pull the powerhead to reinsert it.

My suggestion is to drop the gearcase. Put a garden hose on the water tube, without any clamps. Now turn on the water just a bit and see if it flows thru the motor easily. Pull the telltale hose on the cylinder head cover and see if water streams out. Water should also tumble down from the powerhead.

If the water seems restricted maybe the water tube is clogged with the rubber grommet material or something else.

 

[oakie]

The copper water tube fits into a rubber gromet at the base of the powerhead. It is hard to reinsert if it is pulled out, so do not do that unless absolutely necessary. You may need to pull the powerhead to reinsert it.

My suggestion is to drop the gearcase. Put a garden hose on the water tube, without any clamps. Now turn on the water just a bit and see if it flows thru the motor easily. Pull the telltale hose on the cylinder head cover and see if water streams out. Water should also tumble down from the powerhead.

If the water seems restricted maybe the water tube is clogged with the rubber grommet material or something else.

Again, thanks for the info. I ran a camera up the tube as far as the bottom of the power head and it appears clear. This tube is black plastic. Looks like the power head needs to come off. Thanks