Out drive, water impeller question.

[glennj3]

I can not get the water to come from the water hose, muff, up to the water impeller. I have the boot off the out drive, replaced the impeller pump unit. I burned the first one up before I found out the water was not coming up. I can see the vents with the pump off. Have I done something wrong putting the water impeller in. This is my first time doing it but I have removed and put back on about 8 times now trying to get her right.
Any help will be appreciated greatly!

Glenn

 

[Volphin]

Re: Out drive, water impeller question.

Check the tube. It is not seated.

V

 

[Bifflefan]

Re: Out drive, water impeller question.

You may have missed a old piece of impeller that dropped down or got pushed up into the hose. Try following the hose from the out drive to the motor and remove it from the motor, remove the lower unit and see if you can get water to flow backwards out of the drive. If not its plugged.

If yes,
Here are the steps to change the impeller:

1
Place the throttle into forward gear by pressing it toward the front of the boat. This is required to remove the lower outdrive unit from the upper.

2
Locate the drain screw on the bottom cone of the outdrive. Place a container under the drain hole. Loosen and remove the drain screw with a flat screwdriver. Allow the gear lube to drain from the outdrive before reinstalling the drain screw with a screwdriver.

3
Remove the bolts that attach the lower unit of the outdrive to the upper unit using a wrench. The bolts are located between the fins in the middle of the outdrive. There are two bolts on each side.

4
Slowly pull the lower unit of the outdrive off the upper unit. Use extreme caution to avoid damaging the spindle gears as the lower unit is removed. Place the lower unit onto a flat surface.

5
Locate the water pump impeller housing on the outdrive. It is bolted to the outdrive with four bolts. The drive shaft spindle extends out of the housing. Remove the bolts with a wrench and pull the housing cover off of the outdrive with your hand.

6
Grasp the water pump impeller with your hand and pull it up the drive shaft spindle and out of the outdrive. The water pump impeller is a round object with fins.

7
Place the new water pump impeller onto the drive shaft spindle. Reinstall the housing cover and tighten the bolts with a wrench.

8
Place the lower unit back into position on the outdrive. Install the bolts and tighten them using a wrench.

9
Remove the drain screw on the outdrive and place the gear lube hose connection into the outdrive. Slowly pump gear lube into the outdrive until the lube seeps out of the vent hole on the top of the outdrive. Remove the gear lube hose connection and install the drain screw. Tighten it using a screwdriver.

 

[Don S]

Re: Out drive, water impeller question.

you have the pump assembled incorrectly.
Go to the link below and download the instructions.
http://forums.iboats.com/showthread.php?t=387864

 

[glennj3]

New water impeller, problems....

New water impeller, problems....

I swear I posted this but can not locate it and got no answers so will try again.
My 170 MC ran hot a couple weeks back, stopped soon enough not to have damaged the engine. I decided to replace the water impeller my self for the first time (owned the boat since 1990). Dropped the boot, changed out the entire impeller pump. Replaced unit, used the water hose, muffs, cranked and ran her, got hot fairly fast 175 F. stopped, no water coming from the housing of the boat near thetransomm, water just spraying out of the intake from the hose.
I pulled the unit again, checked the impeller, it had gotten hot and was no good. Got all new kit and replaced again. This time decided to check the unit on the ground. Water hose, muff, no water comes up through and out of the water pump brass tube section. I removed the pump and repeated with the water hose. Watefinallyly came up to the water pump area. I replaced the pump but no water comes up to it.
One mechanic told me the water will not come up without the engine running, makes sensence, the pump can burn up in less than a minute if no water is there and if the hose will not push it up sitting in a lake certainly will not.
The other mechanic said the water should come up through the pump with the hose.

I can see down to the water vents in the boot with the pump off so it is not clogged up at all.

I plan to take the boot to the mechanic Friday and get his eye on it.

Anyone ever heard of this before?

Thank's

Glenn

 

[glennj3]

Re: Out drive, water impeller question.

Thanks for the assisstance Don and everyone, the directions are pretty strait forward and no surprises found. I have removed the boot and the pump several times and can find no problem with it. Just no water will come up through the pump with the water hose and muff on. Burned up the first new one while on the boat and water hose. I now have the boot off the boat with the new impeller on it, water will not come up through the pump.
I did not remove the pump housing beneath the impeller, was told I did not need to remove it as it only covers gears etc.

Glenn

 

[kidafa]

Re: Out drive, water impeller question.

probably a stupid suggestion, but the keyway is in place yes?

Was it all operational then you went to change it and it stopped working?

 

[FirstieRinker]

Re: Out drive, water impeller question.

i agree, check for your woodruff key and make sure that your impeller is spinning the correct way with the driveshaft.

 

[Bondo]

Re: New water impeller, problems....

Re: New water impeller, problems....

One mechanic told me the water will not come up without the engine running, makes sensence, the pump can burn up in less than a minute if no water is there and if the hose will not push it up sitting in a lake certainly will not.

Ayuh,... Sittin' in the lake, the pump is Underwater....

Did ya get the drive key, inside the impeller,..??
Do ya have the impeller twisted the right way,..??

 

[Don S]

Re: New water impeller, problems....

Re: New water impeller, problems....

If you keep burning up impellers, you obviously have the key for the impeller in place, or the impeller wouldn't spin and burn up.
Since you have burned up several impellers at this point, I would have to guess the pump housings (Upper and lower) are probably warped and melted as well. If the pump sucks air due to a warped or melted housings, It won't pull water up.
Post some pictures of the housings.

PS: is the lower unit what you are referring to as the boot?

 

[Bondo]

Re: New water impeller, problems....

Re: New water impeller, problems....

you obviously have the key for the impeller in place,

Ayuh,... I guess without further edittin', my post don't make alota sense, after I merged his 2 threads about this...
Oh well....

 

[glennj3]

Re: Out drive, water impeller question.

Yes the key is in place turns clock wise. Water will not move up through the boot ( lower housig) using the water hose with muff over water intake. The impeller & housing should not prevent water from coming up through the pump. Backed me. Will let a mechanic check in in am & will let y know!

 

[Fishermark]

Re: Out drive, water impeller question.

Perhaps a dumb and obvious question... but do you have the water turned on hard enough with enough pressure? Sometimes you will see someone posting not to turn the water on too hard as it will blow out a seal or something. Forget that. If it is too hard, it will simply flow out the sides of the muffs.

 

[glennj3]

Re: Out drive, water impeller question.

Well I can only turn the water on full. Period. i.e. If I put the boat in water, h2o should flow up to the water level, this is very little water presure. Once the impeller spins it will pump water on through out the hx.
Point is water should flow without hindrance via water hose.mine did not do that.Remember, the boot is separated from the out drive & is on the ground.

 

[Bondo]

Re: Out drive, water impeller question.

Remember, the boot is separated from the out drive & is on the ground.

Ayuh,... It's a lower unit, not a Boot...

Put it together, 'n Start it...

Why are ya tryin' to pump water through it on the ground anyways,..??

 

[Drewmeister]

Re: Out drive, water impeller question.

What Glenn is saying is fairly clear to me, but I don't understand what is going on. He is saying that with the lower drive off the boat, he has installed a near pump impeller and has muffs connected to the water intake and even turning on the hose with standard residential water pressure no water is coming out of the water pump draw tube. Gotta be a clog somewhere Glenn. I know you said you can see the water intake when you look through the pump from the top.

Here's a question for you. Have you reassembled the drive, taken off the water outlet tube to the HX (which has an ID big enough to fit the male end of a garden hose into) and turned the water on to see if it comes OUT the intake gills? I did this the other day myself (as you know we are facing similar issues right now!)

My problem was that the water transfer tube from the upper drive to the bell housing was badly dry rotting and not allowing water from the pump to get to the boat.

Drew...

 

[glennj3]

Re: Out drive, water impeller question.

Bond-o, Drew, thanks for helping. I previously said the first new impeller burned up quickly because no water came up through it (with water hose on). So I figured I would like to check the lower unit out first. That is why it is on the ground. I did pour some water through the plastic guide next to the impeller housing and water did trickle down and out of the water intake.
Tomorrow I plan to check it again in the day light, if water does not come up from the intake through the pump I will head on up to see a mechanic.
Someone told me I should remove the housing below the impeller housing, that is has seals that could be bad. My mechanic told me not to remove it as it only covers some gears. Anyone know what is under that housing?
Also thought I would put the water hose up into the upper housing drive unit on the boat, up on the brass tube, let the water flow and see if it circulates to the HX. Not sure where all it goes before it comes back out of the engine but would assume it would come out of the exhaust ports at the transom? Thermostats only work on the internal closed system, right?

 

[Pikey23]

Re: Out drive, water impeller question.

There are 2 seals under the housing. The top one stops water from going down into the oil. The bottom one stops oil from going up into the water.
http://www.perfprotech.com/store/assembly/GEAR-HOUSING-(DRIVESHAFT)---R,2203-90.aspx

 

[Drewmeister]

Re: Out drive, water impeller question.

Glenn,

Path of cooling water is as follows: Inlet at lower drive gills, up through water pump and draw tube to upper drive - through supply hose through transom - at engine, tube goes near starter and behind the voltage regulator (which it also cools I believe?) and then into the HX on the left side (looking at HX from side) - Through HX and exhausts on right and tube goes up to the exhaust elbow. Mixes with exhaust and goes out the exhaust bellows and exits outdrive through the prop with the exhaust.

Drew...

 

[glennj3]

Re: Out drive, water impeller question.

Fine detain Drew and thanks. Update as follows.
Took the lower unit to my mechanic, we took the pump out, all looked fine to him and we put her back together.
Came home disconnecteded the hose from the water cooled regulator ( I previously changed the charger system to the updated external alternator with fan belt) the hose and water still goes through it and then on to the HX. I pulled the hose off at the front on the regulator, put a hose to the out drive pickup tube (the brass one) and turned on the hose, water came through with no problem. So the regulator may be plugged up since it did melt down some time back.
Tomorrow I plan to just replace the entire hose from the transom to the H
x bypassing the old regulator).
Now I should be able to just loosen the hx plate up front and the water should go through it too if the regulator if it not plugged up.

I think is all clear to say the truth. So that would take me back to my lower unit. Guess I will put her back together, use the water hose and crank her up. If water does not come through the 3/4 inch hose I disconnected then I will turn her off quickly and the problem is with the lower unit pump area.
Just hate to put her back on just to take her off again!
Possibly I did not get the pickup brass tube in place in the pump, but sure thought it was in place. I put it into the outdrive first, then use the plastic guide on the lower unit to slip her on.

Glenn