1996 48hp johnson extreamly high rpm

[midnight rambler]

I have a 1996 johnson 48hp that when stared will scream at a very high rpm moving the throttle won't do anything when I go to shut the engine off tutning the key or pulling the saftey off won't shut off the motor I have to disconnect the gasline and let it run out of fuel. Any suggestions?

 

[rickdb1boat]

Re: 1996 48hp johnson extreamly high rpm

Look into the carb throats and see if the throttle plates are fully closed when the throttle is in neutral.

 

[Silvertip]

Re: 1996 48hp johnson extreamly high rpm

Have you been messing with linkage or cable adjustments? If it won't turn off with the key you have an electrical problem as well. Disconnect the large harness connector at the engine. Check and clean terminals and give it a try.