1974, johnson 115 hp won't start

[sv3100]

I have had trouble starting my outboard the last 3 times i took it out. I get it in the water and it won't start. I can get it started out of the water with some effort but in the water, it sounds like it wants to start, then after a few trys, nothing. How can I check to see if all 4 cylinders are firing? I did have the carb. rebuilt. No change. Fuel pump works fine, new spark plugs, battery charged. Im at the point of selling the motor and buying another one. Help please.

 

[12Footer]

Re: 1974, johnson 115 hp won't start

When it does finally start, does it run on all 4?<br />Does it reach it's high RPM?<br />Does the primer ball get hard when you pump it up?<br /><br />If so,a good place to start looking for the problem is at the kill switch.<br />Then,the ignition switch itself.<br />The contacts corrode,and it'll drive you nuts. Also,look for corsosion at all the connections at the engine.<br />Good luck.