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1961 Johnson 2 cylinder water pump check

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pete

Member
I just bought a 1961 Johnson

I just bought a 1961 Johnson 5.5hp 2 cylinder and was wondering if anyone could tell me where the water pump water inlet and outlet is located. I started the motor using a water tank but was not able to determine whether the pump was actually pumping water. How do I verify that the pump is operating? Any information would be very helpful

Thanks
 
" Pete.... There will be a wat

" Pete.... There will be a water intake just above the prop at the rear of the cavitation plate, and another intake just above the cavitation plate on one side.

The water outlet will be just above the prop, but the main outlet that will keep you advised of the water pump pressure is the hole at the rear of and halfway down the exhaust housing (the hsg between the powerhead and the lower unit). If no water comes out that hole, the water pump is not operating properly.

The water pump is located directly on top of the lower unit, so have the water level about 3" higher than where the lower unit bolts up to the exhaust housing when being run.

Joe (30+ Years With OMC) "
 
" Thanks Joe,


I'll pu

" Thanks Joe,


I'll put it in the tank tonight and check it out again. Do you know if this model has a thermostat? "
 
"Thermostat is under the plate

"Thermostat is under the plate that's attached to the top of the head with three bolts.

Joe
"
 
" Once again thanks Joe,

Do

" Once again thanks Joe,

Does the thermostat allow any water to flow even if the motor is cold? Is there a bypas that allows water to flow out of the hole half up the leg but not the motor? I guess I'm confused how the water can be flowing if there is a thermostat in series that's cold

One last question, One of the manuals at the library says that Johnson motors 1956 to 1963 should have an oil/gas ratio mixture of 24 to 1 and motors after 1963 should be 50 to 1. A local shop told me 50 to 1, do you waht the proper ratio should be? My motor is a 1961 "
 
"Pete.... That engine's be

"Pete.... That engine's bearing setup does not consist of "all" roller and/or needle bearings, but rather has some bronze sleeve type (babbit) bearings.

A rule of thumb is to use 24/1 mixture on any babbit type bearing engine, and 50/1 on any engine that consists of "all" roller and needle bearings.

Bottom line... use the 24/1 mixture on your engine (1pt of 50/1 oil to 6gal of gas, 87 octane gas will be fine).

Water bypass? I don't have the book in front of me, and frankly I don't remember exactly how the water flows in that engine. Again, rule of thumb is to replace the water pump assy and the thermostat.... the lesser of two evils cost wise.

Joe (30+ Years With OMC)"
 
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