New 1971 Johnson 6HP - How hot should she get?

C

Caseyuconn

Seaman
Joined
May 1, 2011
Messages
61
Just purchased what appears to be a nearly brand new 1971 Johnson 6HP.
There is no telltale on these small motors but I see water pushing out of the exhaust port.
What temperature should the block be when running this motor?
What temperature is the thermostat of these motors set to open at?

I noticed the entire block is cool to the touch while running except for a small part on the starboard side is fairly hot (Can keep your fingers on it for +/- 10 seconds)

I want to ensure that I am not going to fry this motor unknowingly while running it and would like to ensure it is operating correctly.

Thanks
 
D

DJ

Guest
Re: New 1971 Johnson 6HP - How hot should she get?

The part that gets hot is the exhaust cover.

It's good you can touch the head, etc and not burn your fingers and you seem to have water flow.

The typically run about 130-145*.

If the engine is new to you, I would still replace the water pump impeller and the lower unit lube, with new fill/drain plug seals. All that is about 1/2 hour and $20.00
 
cajuncook1

cajuncook1

Chief Petty Officer
Joined
Sep 3, 2009
Messages
559
Re: New 1971 Johnson 6HP - How hot should she get?

As always, DJ, gives good sound advice.

Here is an article about your motor that is a good read. Parts for your motor like ignition parts, water pump impeller, carb kit, fuel pump, and more is availabe on this site.

http://www.sschapterpsa.com/ramblings/OMC_6hp.htm

Here is two links for an electronic parts diagram for your motor.

http://www.marineengine.com/parts/johnson-evinrude-parts.php?year=1971&hp=6&model=6R71E

http://www.boats.net/parts/search/BRP/JOHNSON/1971/6R71E 1971/parts.html

Good luck....great little motor you have there!!
 
C

Caseyuconn

Seaman
Joined
May 1, 2011
Messages
61
Re: New 1971 Johnson 6HP - How hot should she get?

Thanks for the info. I think I will do the water pump just to be sure.

I wanted to attach a picture just to show how clean this motor is. On top of the shape, it was a STEAL at $250.

She will look nice on the back of my Montauk.
 

Attachments

  • IMG_5172.jpg
    IMG_5172.jpg
    141.8 KB · Views: 0
D

Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: New 1971 Johnson 6HP - How hot should she get?

Man, that really is a nice looking engine. If given proper maintaince those engines will last several lifetimes.
 
You must log in or register to reply here.
Top