Water pump help

[Glasspardude87]

Got a 1973 glasspar 140hp I/o mercruiser they guy I purchased it from said he had a new water pump put in last year but just got the boat back from the shop today and the mechanic says I need a new one. I took the lower end off to look at the pump with the thought that I would just replace it
Myself but the thing does look new. What are your guys thoughts? Says my picture is to big to upload I am doing it from my phone so can't
Post a pic just yet

 

[Bt Doctur]

So the shop dropped the lower to tell you it needs a new one, reassembled it telling you it needed a new one and your dropped it to inspect it ?
For $60 just replace it.
Not my kind of shop.

 

[Glasspardude87]

Ok thanks!

 

[stonyloam]

OK the water pump is on the front of the engine and circulates water through the block, the impeller is in the outdrive and pumps water to the engine. If the mechanic said you need a new "water pump" rather than a new " impeller" you should make sure you are talking about the same thing. An engine that old may indeed need a new waterpump. It is important to get the terminology correct with a boat. Agree if he was talking about the impeller without asking when it was changed or looking at it, find a new mechanic.

 

[Glasspardude87]

Well I changed out the impeller it needed it. Did it exactly how the manual said. I have it hooked up to muffs and have the water on where should the Pee hole be at? And will it pee without the motor running?

 

[Bondo]

Ayuh,.... There is no pee hole on outdrives,...

Fire it up on the muffs, 'n see how it does,...

 

[Glasspardude87]

You bindi did what you told me and ran into another problem /pull my hair out! I can get it to start in forward and reverse no problem but it won't run in neutral acts like its fuel starved

 

[Glasspardude87]

I have to push the button in middle
Of shifter then put it into gear and then it will start and run just gotta adjust throttle for rpm but I know it's not supposed to work like that. Any thoughts from the boat masters?

 

[Glasspardude87]

Ok so here is a full break down after spending all day on this thing. I found out about neutral detent switch on my throttle if push it in and move throttle forward a bit and it starts but move it back into neutral position and the motor dies so that is problem 1...Problem 2 I replaced the water pump/impeller in lower end today got everything bolted back up and put muffs on and got it running despite problem one wanted to see how the water flow looked going to motor so I took off all the hoses and thermostat housing to check and no water through there. Is there a different place where water is sucked up into the motor or does it need the circulating pump on the front end to pull it from lower end? or did I put the lower water pump in wrong? seems like the actual water pump that is on motor is not circulating anything. All I know is I keep running into problems lol was hoping to get everything done this weekend but looking like a bigger project then I anicipated. here is everything I got done to it so far. I put new plugs wires cap rotor condensor changed gear oil in lower end put ne pump and impeller in lower end all new gaskets as well didnt reuse old ones. feel free to text or call me even if I need to explain something better lol 913-705-0853

 

[Bt Doctur]

If you installed the impeller correctly and installed the lower unit into the upper correctly you will have plenty of water at the housing.
If there is no water, you missed something in the assembly.. copper tube, water inlet tube, impeller keyway.
On most control boxes you push the button in to have " throttle only " for starting and warm up. you not shifting into gear untill you pull the throttle back to idle and the button pops back out, then your able to shift into gear and apply throttle.

 

[Glasspardude87]

There was no copper tube in my kit just a white tube that I put from the upper unit to the bottom unit yes when Inpull the throttle back after it is warmed up it dies

 

[Glasspardude87]

It seemed like it fit fine in the lower pump but there was a rubber grommet Inhad to pull out of the upper unit so the white tube would slide in I'm guessing now I should not have done that. I am guessing that the white tube isn't "snug in the upper unit and letting water spill back into the cavity

 

[Bt Doctur]

Sounds like you dont have a manual ,Drain the oil in a clean container to reuse it. shift into fwd , drop the lower unit.
you will find a copper tube most likely stuck in the upper unit. It is held there by a rubber bushing.
On the top of the water pump body is where the plastic guide tube goes, there also is a rubber bushing inside the pump cover.lightly grease it.
Install the lower unit with the splined shift shaft turned fully clockwise so that the prop is locked CCW and guide the copper tube into the plastic guide tube
slightly turning the prop CCW about an inch or less to line up the driveshaft splines and align the brass shift shoe onto the splined shift shaft.

http://www.boatfix.com/merc/Servmanl/6/6A3R3.PDF upper

http://www.boatfix.com/merc/Servmanl/6/6C3R3.PDF lower

 

[Glasspardude87]

Ok yea the bushing in the upper is what I removed and just used the white guide tube there was no copper tube when I disassembled it. Could that be why it was not sending water to motor because there was not a good seal from the pump to the upper unit?

 

[Bt Doctur]

the rubber bushing in the upper(water pocket cover) is where the copper tube goes, no copper tube ,no water flow into engine..
the copper tube is about 8 inches in length..it is inserted into the upper unit.When you mate the units the copper tube goes into the plastic guide tube that is pushed into the top cover of the water pump.It mates when the 2 units are bolted together

 

[Glasspardude87]

Awesome well I know where I messed up thanks for all the clarification. Hopefully it will be smooth sailing from here