1972 Johnson 100 HP not firing constantly

57 7.5

Petty Officer 3rd Class
Joined
May 25, 2007
Messages
93
Ok I've posted several different post for this motor and finally got it running. Now I have a new problem, I have all new batteries for starting and trolling to let everyone know. I can go out one day and start the motor and it run fine and start with just a turn of the switch once it warms up. Then I can go out the next day and it won't fire, just turns over. I don't have a spark tester yet but believe i'll get one soon since it seems I need one. I did a compression test and all cylinders have 120 psi except the bottom cylinder on the bottom right it's 110 psi. When it's running the boat (16 ft f/s) will do 40 mph with two people, full tank of gas and all the gear I have stored and one live well full of water. Also have pulled a tube with two people and still got 35 mph. So I'm not sure where the problem is, if it's the coil or the pulse pack, I have a used remanufactured power pack and coil that I got a good deal on just to have in case. Any help would be great.
 

57 7.5

Petty Officer 3rd Class
Joined
May 25, 2007
Messages
93
Sorry for the double post, was having an problem while posting.
 
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