70hp johnson stalls only at idle

ryanr623

Chief Petty Officer
Joined
Jul 11, 2008
Messages
489
Like the title says. If I leave the warm up lever on it will keep running. If it stalls at idle, i need to put the full choke on to start it back up. It will run with warm up lever down only if i have it in gear and giving gas. 1975? Johnson 70hp 3 cylinder. BTW Compression test was EXACTLY 130 PSI across all three cylinders.
 

tashasdaddy

Honorary Moderator Emeritus
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Messages
51,019
Re: 70hp johnson stalls only at idle

sounds like either dirty carb, or idle speed stop screw needs adjusting. you should be idling, in the water, in gear, 650-750 rpms. great compression, have you check spark and all 3 cylinders?
 

ryanr623

Chief Petty Officer
Joined
Jul 11, 2008
Messages
489
Re: 70hp johnson stalls only at idle

I am doing that today (checking spark). I am changing plugs because they looked bad....black. I will check the spark at that time.

BTW BEAUTIFUL dog. Pure Siberian? As soon as I move out of my twinplex (too small) I will be getting one of my own.
 

tashasdaddy

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Re: 70hp johnson stalls only at idle

pure siberian. was abused, i rescued her. sweetest thing in the world. loves boats.
 

ryanr623

Chief Petty Officer
Joined
Jul 11, 2008
Messages
489
Re: 70hp johnson stalls only at idle

God bless you, how could anyone abuse such a beautiful dog. Any animal really. I have a very low (no) tolerance for animal abuse
 

clemsonfor

Lieutenant Junior Grade
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Sep 19, 2005
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Re: 70hp johnson stalls only at idle

my abused (not by me) rescued dog loves boats also!

-nate
 
Joined
Jul 15, 2008
Messages
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Re: 70hp johnson stalls only at idle

Hi i have a 1974 checkmate boat with a 1984 235 evinrude outboard. When ever the boats trim is all the way down and its running at idle it cuts out. what can i do to stop this problem
 

tashasdaddy

Honorary Moderator Emeritus
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Re: 70hp johnson stalls only at idle

zebrowskicheckmate, start your own thread, hijacking some one elses is very rude. thank you.
 

Scottycat

Cadet
Joined
Jun 20, 2010
Messages
24
Re: 70hp johnson stalls only at idle

Ryan:

Did you ever find the problem?
I have the same issues, exactly, and trying to fix.

I hate when things don't run right.
-Scott
 
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