28 johnson 4 cycling below 3000 rpm

[shaffer]

I have a 28 hp 1992 johnson.It acts like it is 4 cycleing be low 3000 rpm. I runs great afer 3000 rpm .It is link an sycn to the specs. Carb has a new kit in it. New spark plugs.New gas. What else could it be.

 

[etracer68]

Re: 28 johnson 4 cycling below 3000 rpm

Im not sure what you mean by "4 cycleing",

 

[steelespike]

Re: 28 johnson 4 cycling below 3000 rpm

4 cycling is usually from being too rich. the motor stutters kind of like its firing on every other stroke.
Older motors some times 4 cycle when the throttle is advanced after an extended idle speed operation.
Some motors have a bleeder valve that drains excess fuel out of the crankcase. If the 28 has one perhaps its plugged.
Older motors dumped the fuel overboard newer motors recycled it and burned it.Don't know about the 28.
Or if a malfunction could cause 4 cycling.Some carbs have a midrange jet that might cause trouble.
I wonder if a float set a little high might cause a problem.

 

[shaffer]

Re: 28 johnson 4 cycling below 3000 rpm

Thanks for the advice.