choke on 1988 evin. 120hp

[mikmax]

I recently bought a boat with a 1988 evinrude 120 hp motor. It has a fast idle lever but no visable choke button. Is it automatic or what? Someone told me it may be one that you push the key in while you crank it to choke it. Please help!!!

 

[Joe Reeves]

Re: choke on 1988 evin. 120hp

Pushing the key in activates the fuel primer solenoid.

(Fuel Primer Solenoid Function)
(J. Reeves)

The RED lever...... The normal operating/running position is to have that red lever positioned over top of the solenoid and aimed at the other end of the solenoid, gently turned to its stop. This is the normal/automatic mode position. Pushing the key in opens the valve within the solenoid allowing fuel to pass thru it in order to prime and start the engine. Looking upon this solenoid as a electric choke results in a better understanding of it.

Having that red lever turned in the opposite direction, facing away from the solenoid, allows fuel to flow thru it to the crankcase area. One would only turn the red lever to this position in a case where the battery might go dead and the engine had to be started via the rope pull method. Look upon putting the red lever in this position as moving a choke lever on a choke equipped engine to the full closed position. Either one would supply fuel to the crankcase/engine for starting purposes BUT if left in that position while running would flood the engine.

The later model primer solenoids are equipped with a schrader valve, used for attaching a pressurized can of fogging oil etc, available at your local dealership with complete instructions.

Pumping the fuel primer bulb up hard fills the carburetor float chambers of course, but that process also applies fuel pressure to the primer solenoid.

The two small hoses leading from the primer solenoid branch off via tees to each fuel manifold section that would feed fuel to the individual cylinders.

Pushing the key in activates the primer solenoid to allow fuel to flow thru it to the intake manifold passageways. Cranking the engine over causes the fuel pump to engage which in turn sends fuel pulses to the primer solenoid via the 3/8" fuel hose.

Some engines incorporates the "Fast Start" feature which automatically advances the spark electronically so no advance of the throttle is required for starting.
Engines that do not have the "Fast Start" feature will be required to have the throttle advanced slightly.

Starting procedure: pump fuel bulb up hard, crank engine and push the key in at the same time. When the engine fires/starts, release the key so that it falls back to the run position.

Bottom line..... Look upon the primer solenoid as an electric choke.

 

[James R]

Re: choke on 1988 evin. 120hp

Remote controls for your motor and masses of others used the push key in to operate choke.
Turn the ignition on and push the key in. You should hear the choke solenoid click on the motor.

 

[dragonfly 200]

Re: choke on 1988 evin. 120hp

That uses a primer system, with the key on, push in on the key and you should hear a clicking sound back at the engine, It sprays a small amount of fuel into the intake to aid in starting, after the engine starts you can push the key if it starts to die until it warms up enough to run on its own.
If this has set for a long time I'd replace all the hoses and make sure you don't have any leaks, fires are no fun. You can search threads for "primer system" on the drop down box at the top of the forum to find more detailed threads on this subject. Good luck

Dragonfly 200
89 200 V6