83 Envinrude 25hp Water Pump???

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redfish10

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Just fired up a 83 Evinrude 25hp model#E25RLCTE and I'm only getting drops out of the cooling pisser. I'm suspect to say water pump but is there anything else I can check before droping the lower unit. Not very familiar with this motor and could use as much help as possible. Thanks.
 
jbjennings

jbjennings

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Re: 83 Envinrude 25hp Water Pump???

Those pisser hoses are notorious for getting stopped up. Run some weedeater line through it and then try it. Or you can even take the hose off the nipple in the exhaust cover and see if it spits out water hard there.
If still no water you should probably drop the lower unit. You should always replace the impeller in a motor new to you anyway. I believe the shift shaft disconnect under the intake screens has a plasic "keeper" under the 2 nuts you'll have to take off to drop your lower unit.
Good luck,
JBJ
 
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redfish10

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Re: 83 Envinrude 25hp Water Pump???

I disconnected the hose from the block and still only had drops no steady stream of water. I guess I will replace the water pump. When you refer to the [shift shaft disconnect under the intake screens has a plasic "keeper" under the 2 nuts you'll have to take off to drop your lower unit.] do you mean the water intake screen on the lower unit. This motor only has one that is on the left side of the motor (looking at motor mounted on the boat)
 
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redfish10

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Re: 83 Envinrude 25hp Water Pump???

OK I have the lower unit off and the impeller out of the water pump housing. I have two questions. The impeller looks fine all veins in tack but it fits extremely tight inside the housing almost like the rubber veins are swollen. When I re-installed the impeller into the water pump housing I have to almost force it into the housing. Should the fit be that tight.

Question two. Should I be able to pull the drive shaft out of the gear case.
 
jbjennings

jbjennings

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Re: 83 Envinrude 25hp Water Pump???

You have the older lower unit, so no intake screens on both sides like the newer one. The impeller should be a tight fit---you should have to turn the driveshaft clockwise and push down a little on the housing to get it to go in. I like to lube the impeller veins a little before installation. It's normal for the driveshaft to come out. Just put back in and if it goes in all the way back and you can turn it with no grinding you're fine. Did you get the impeller drive pin back in right? Make sure you get that water tube back in the water pump grommet properly and make sure your shift shaft groove is lined up perfectly with the hole in the connector and you should be o.k.
If it were me, before installing the lower unit I'd put a piece of 3/8" fuel line on the water tube and duct tape the other end to a water hose and crank it up with the hose pushing water through the power head to make sure there are no obstructions since your impeller was o.k. to begin with.
Good luck,
JBJ
 
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redfish10

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Re: 83 Envinrude 25hp Water Pump???

Thanks JBJ I will do that. The impeller looks fine with no signs of wear. I will try to flush the power head as stated. If I still have no water what would be the next step of troubleshooting. Thanks for the help so far. I greatly appreciate it.
 
jbjennings

jbjennings

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Re: 83 Envinrude 25hp Water Pump???

I'd cross that bridge when I came to it. Hopefully the problem is in the lower unit. If there's an obstruction in the powerhead, I'd take the thermostat out and see what it looks like. Has the motor ever been run in saltwater? I'd try the water hose again with the thermostat out and see if it's getting to the thermostat. If I had to, I'd take the exhaust cover out and look there. If it's blocked in the powerhead, I might just bite the bullet and take the powerhead off and see if the upper water tube grommet is in good condition and then take the exhaust cover and head off and check all the water passages. But like I said, I'd cross that bridge when I came to it. Normally if all of your impeller fins were intact then there's a good chance your powerhead will be clear. Have your ran it into any sand on the bottom? Sometimes it will suck up sand and it can get in the water jackets and block them.
Hope you figure it out,
JBJ
 
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redfish10

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Re: 83 Envinrude 25hp Water Pump???

Call me dumb but where is the thermostat located. Is it something easy to remove . Or do I have to remove the head cover or anything like that to get to the thermostat.
 
jbjennings

jbjennings

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Re: 83 Envinrude 25hp Water Pump???

There's a cover on top of the cylinder head you must remove to get to it. You won't have to remove the head but if you take it off you WILL have to most likely replace the gasket unless you're lucky and careful.
Maybe this will help:
http://www.crowleymarine.com/brp_parts/diagrams/27056.cfm

Part #14 is the thermostat.

Don't take it out unless you have to. I believe even if the thermostat is shut, you'll still see water out the tell-tale.
Later,
JBJ
 
Mas

Mas

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Re: 83 Envinrude 25hp Water Pump???

redfish10 said:
When I re-installed the impeller into the water pump housing I have to almost force it into the housing.
Click to expand...

Did you replace the impeller...or just put the old one in? Hopefully, you put a new one in.

MAS
 
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redfish10

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Re: 83 Envinrude 25hp Water Pump???

MAS, Im going to replace it due to the fact that I have no idea on how old it is.
 
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redfish10

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Re: 83 Envinrude 25hp Water Pump???

Is there a trick to getting the water tube back in the water pump grommet properly.
 
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redfish10

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Re: 83 Envinrude 25hp Water Pump???

Ok. I connected a 3/8" piece of fuel line to the water tube with lower unit off. I still just get fast drops of water from the pisser. If I pull the pisser line from the manifold I have water shooting out 10', connect it back up and still only have fast drops. I also ran a piece of weed eater lin through the pisser line to clear any debris. Is this just normal for this motor to just drip fast when on a set of muffs or with a hose directly to the water tube. Any more input great appreciated.
 
jbjennings

jbjennings

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Re: 83 Envinrude 25hp Water Pump???

I don't fully understand what you wrote, but here goes.
If you hooked the water hose up to your water tube and water shot out of the pisser line nipple then your power head is clear and the problem lies in the lower unit. If the pisser tube is clogged or being pinched or kinked it won't let water out.
THere should be a hard stream of water out of the pisser tube whether on muffs, in the water, etc., if your water pump is working properly. If not then your pisser tube is kinked, pinched, or clogged.
JBJ​
 
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redfish10

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Re: 83 Envinrude 25hp Water Pump???

JBJ. Thanks I need to pull the pisser tube and check that again. I will let you know what I find out.
 
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redfish10

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Re: 83 Envinrude 25hp Water Pump???

Ok have everything back together and working. Problem found. I believe that there was an obstruction in the power head and the pisser nipple on the bottom part of the motor cover was obstructed. Reinstalled new impeller and reinstalled lower unit and everything seems to be working fine. Thank you all for time and help.
 
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