Replaced impellor, telltale sputters water?

C

clemsonfor

Lieutenant Junior Grade
Joined
Sep 19, 2005
Messages
1,011
Ok since this got buried in the other thread about the shift linkage , I thought I would start it's own thread.

I have a 1998 60hp evinrude. I just got the motor. It had a weak but solid stream, and was not over heating the trip I took it out on when I purchased it.

Impellor was very old and looked like it had been dry started with the melted parts of the fins. No big deal got the kit replaced everything but the plate as it was not the right one but the impellor and housing were. Put it back togeather and I get an intermittent pulsing stream. I pulled it back apart, tube is going into the housing , the grommet is in the inside of the tube. All parts replaced that came off? Tore it back doen. Fins the right direction, key in right reassemble it and same thing?

This is on a hose, I have weak water pressure but neither my other 60hp or my 150GT have trouble shooting a solid stream?

Here is a video of it.
https://youtu.be/PFJ17sL9s1w


Any thoughts?
 
T

thegipper

Petty Officer 1st Class
Joined
Jul 16, 2015
Messages
236
Interesting. My 1970 60hp Johnson does the exact same thing, maybe even worse. It doesn't matter if its on the lake or has the muffs hooked up, the tell tale (which I added) sputters. I used my infrared temp gun and the head is 124 deg, the thermostat housing is 120, and the water that does come out measures 104 degrees. This is after the motor has been idling for a good 10 minutes. This motor never had a tell tale so I'm not sure if this is normal or not.

The previous owner had the carbs rebuilt, new impeller and a few other things just a year ago.

Hopefully someone with knowledge on this issue can chime in and let us know why a tell tale would sputter like that. Maybe there is some kind of blockage or something?

Here is the video of mine: https://www.youtube.com/watch?v=B5uhqJuZpEU
 
C

clemsonfor

Lieutenant Junior Grade
Joined
Sep 19, 2005
Messages
1,011
I have a 1981 2cyl 60hp and there is a strong stream no sputtering? And like I said the previous impellor was a steady stream, just weak.
 
oldboat1

oldboat1

Fleet Admiral
Joined
Apr 3, 2002
Messages
9,612
If the old impeller disintegrated, there may be bits and pieces in the passages (may flush out). If it were mine, I would find a big trash barrel to test it, or back it into the lake. Lower unit has to be sunk reasonably deep (few inches over the impeller). Just let it idle.

Another option is to pull off the lower unit again, and flush up the water tube. If you pull the thermostat, you can also flush down from the top. Just back flushing the tell tale will sometimes do it, of course -- probably already tried that.
 
C

clemsonfor

Lieutenant Junior Grade
Joined
Sep 19, 2005
Messages
1,011
oldboat1 said:
If the old impeller disintegrated, there may be bits and pieces in the passages (may flush out). If it were mine, I would find a big trash barrel to test it, or back it into the lake. Lower unit has to be sunk reasonably deep (few inches over the impeller). Just let it idle.

Another option is to pull off the lower unit again, and flush up the water tube. If you pull the thermostat, you can also flush down from the top. Just back flushing the tell tale will sometimes do it, of course -- probably already tried that.
Click to expand...

I am taking it to the lake when I get a chance this week to sink and run it idle on the trailer. Hooking a hose to the tube and pulling thermostat is next.

The old impellor wasn't really disinterested, the tips of the fins where they touch the top of the cup were more like meter from heat, but all rubber looked accounted for, just deformed.

I am hoping it is just something weird with the hose and pressure and with it submerged it pumps normal. It did like to be in water before to pump as well, didn't like to pee on his muffs but was a steady stream in the water, I just assumed his muffs were junk.
 
T

thegipper

Petty Officer 1st Class
Joined
Jul 16, 2015
Messages
236
How would you back flush a 1970 60hp johnson? I am wondering if I have some debris somewhere in the cooling passages and maybe that is why my tell tale sputters. Some people say to remove the thermostat and back flush through there but how exactly do you do it? Do you just put a hose in the house and run water through it or is there some kind of hose hook up setup you can use to get some pressure in there?

I forgot to mention, I did add a tell tale by removing the plug at the top of the cylinder head where a tell tale can be added. Can I hook a hose up in this location to back flush it?

Thanks
 
Bayou Dave

Bayou Dave

Lieutenant Commander
Joined
Dec 13, 2012
Messages
1,780
Can you pull the telltale piece off? Mine gets clogged now and then with little bits of debris. I just pull it off and clean it out.
 
T

thegipper

Petty Officer 1st Class
Joined
Jul 16, 2015
Messages
236
The tell tale piece itself is not blocked at all, I'm assuming there is some kind of blockage in the system which is why it sputters. In the video I posted in my above post, you can see the water sputtering into the clear tube from the brass fitting where I added the tell tale. I guess my question would be, can I back flush through that fitting?

Or should I back flush through the thermostat housing and if so, how?
 
T

thegipper

Petty Officer 1st Class
Joined
Jul 16, 2015
Messages
236
On the top of the cylinder head near the lifting hook. There was a threaded plug that can be removed to add a nipple and hose, thus giving you a tell tale.
 
jakedaawg

jakedaawg

Rear Admiral
Joined
Jun 26, 2012
Messages
4,275
I believe this motor calls for an updated thermostat housing, spring and stuff. Oem.

Was the water pump oem?

racerone I believe is the one who originally posted this service bulletin. Maybe he will chime in here.
 
C

clemsonfor

Lieutenant Junior Grade
Joined
Sep 19, 2005
Messages
1,011
DRS4164 said:
Can you pull the telltale piece off? Mine gets clogged now and then with little bits of debris. I just pull it off and clean it out.
Click to expand...

Pulled it off where it connects t the side in the cooling passage and it sputters there. Thought about that. Stupid dirt daubers clog my 150GT up every year!!
 
C

clemsonfor

Lieutenant Junior Grade
Joined
Sep 19, 2005
Messages
1,011
So until I take it to the lake to sit it in water, some suggestions, some are from another boating forum are....

Hook a hose to water pipe with lower unit off, crank it up to see if telltale changes and amout out of prop changes.

Pull impellor housing off and put housing back on while I twist housing instead of impellor into housing and onto the drive shaft because they were not sure the fins were right although I know they are and I can see them looking down through the tube but if I get apart I will do. I didn't do this way like I have on others cause the fins I couldn't compress with my hand were pulling the housing o ring out of the groove.

Pull powerhead to check for blockages.

Pull thermostat and look for blockage and backflush.
 
T

thegipper

Petty Officer 1st Class
Joined
Jul 16, 2015
Messages
236
I apologize for hijack! I originally posted because we were having the same issue but got side tracked. If I can't figure out my own sputtering issue, I will make a new thread.

Again, sorry for the confusion!
 
You must log in or register to reply here.
Top