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1952-1967 Evinrude and Johnson 3 HP Lightwin Tune Up Project
1954-1964 Jonnson CD Series 5.5 HP Seahorse same as Evinrude Fisherman Tune Up Project
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From: edward
Date: 20 Oct 2008
Time: 15:16:11 -0500
Remote Name: 76.216.106.44
the motor runs good fast when you try to idle or run at a idle after a bout 2 or 3 min. it acts like it runs out of gas it will start right back up if you chock it but it will not idle till you run it fast for a min. or 2 any help will be appreciated edward
From: Tom Travis
Date: 29 Jun 2005
Time: 14:57:08 -0500
Remote Name: 63.252.160.20
From what I understand, you have to have 65 psi in order to have combustion. 85 is about average for the older motors. Newer motors have around 110 to 115 but the older motors were not designed for that. I am getting ready to put new rings in my 5.5 HP motor. I don't know what my compression is currently but I have gas sputtering out of the front of the carburetor which leads me to believe that there is too much pressure blowing by the pistons into the crank case. Rings are hard to find for these old motors. I know of one place but they seem to be expensive and I am still shopping. I've got someone who is going to help me with the ring job and I intend to write it up for this site.