Need help with 1956 johnson

[aaind]

Ok
my fav 15 hp 1956 johnson was not pumping water ,so put it away the last fall ,over the winter got yet another
so today i got new one out ,got it running and it stopped pumping water ,got old one out and put in new impeller ( dont like that job ) but the old one looked ok and new one dint pump either ,so today I GOT 3 THAT ALL DID THE SAME THING
7.5 also was running great!
the other 15 impeller looks ok also
There feels like lot of air moving but no water,what else could it be

Thanks

 

[lindy46]

Re: Need help with 1956 johnson

Are you running it in a test tank? Is the lower unit deep enough in the water?

 

[aaind]

Re: Need help with 1956 johnson

Are you running it in a test tank? Is the lower unit deep enough in the water?

Yes more than enough
Can or do the lines inside power head plug up?

 

[twocyclemania]

Re: Need help with 1956 johnson

Any possibility the thermostat is frozen shut? Try running the motor with the thermostat cover off and see if it's pumping up to that point.

 

[aaind]

Re: Need help with 1956 johnson

Any possibility the thermostat is frozen shut? Try running the motor with the thermostat cover off and see if it's pumping up to that point.

Where is that ??

 

[Steve A W]

Re: Need help with 1956 johnson

I don;t think the 56 has a thermostat.
Is the pump housing pitted or scored?
How are the tube grommets?
Good Luck.

Steve A W

 

[bplayer405]

Re: Need help with 1956 johnson

Couldn't get my 57 johnson 18 hp to pump water either until I got the pump itself under water. They wont prime from just having the lower inlets under water-my mistake. Make sure the whole lower unit is a few inches under water. Not to say that's it but it is easy to overlook.

 

[lindy46]

Re: Need help with 1956 johnson

No thermostat on that motor. Try rigging up a garden hose to the copper water intake tube and see if water flows through the system.

 

[aaind]

Re: Need help with 1956 johnson

I try that , thanks