86 Johnson 60hp runaway Rpm when starts

[Camshaftkirby]

I just bought my first boat and it has a 1986 Johnson 60hp outboard. When I start the motor it starts reving up to extremely high speed. Can anyone help?

 

[boobie]

How do you get the RPM down or don't you ??

 

[fhhuber]

Possibilities include stuck carb butterfly.. air leak between carb and reed valves.

I'd pull the cover pieces off the carb(s) and start looking there.

I'll assume you killed it with the ignition switch.
a runaway can destroy the engine if you don't shut it down fast.

 

[jimmbo]

Does it only do that when you enable the starting throttle linkage? Or, does it always happen?

 

[Nawages]

Was there an answer to this question

I have same engine and it only runs away after goin to full throttle
rins fine as long as I don’t go to full throttle

and all my linkage Is fine an goes back to closed position

 

[GA_Boater]

Was there an answer to this question

I have same engine and it only runs away after goin to full throttle
rins fine as long as I don’t go to full throttle

and all my linkage Is fine an goes back to closed position

4 years ago the OP started a thread and didn't answer any questions. Don't expect an answer unless you start a thread.

Closed.