Wire schematic for 1962 rude. available?

[rickou812]

Looking for a wire schematic for a 1962 28hp evinrude, is there anything available online?

And while on the subject, what the heck is the "Vacuum switch" for?

Thanks,
Rick

 

[tx1961whaler]

Re: Wire schematic for 1962 rude. available?

If the throttle is closed while the motor is operating in neutral, crankcase suction may become abnormally high. This high suction (vacuum) will cause erratic functioning of the carburetor,allowing the motor speed to increase. The function of the cut-out switch is to short out the breaker point from the lower cylinder momentarily when crankcase suction increases, preventing the lower cylinder spark plug from firing and thus reducing motor speed.

 

[rickou812]

Re: Wire schematic for 1962 rude. available?

If the throttle is closed while the motor is operating in neutral, crankcase suction may become abnormally high. This high suction (vacuum) will cause erratic functioning of the carburetor,allowing the motor speed to increase. The function of the cut-out switch is to short out the breaker point from the lower cylinder momentarily when crankcase suction increases, preventing the lower cylinder spark plug from firing and thus reducing motor speed.

Extremely interesting, How is this over come in other engines?
The 1962 28hp is the first I have ran across with this device.

 

[tx1961whaler]

Re: Wire schematic for 1962 rude. available?

Extremely interesting, How is this over come in other engines?
The 1962 28hp is the first I have ran across with this device.

Beats me. My little motors have not had one. All of my 40 HP's have had them. I assume that the real new ones have an over-rev cut out in the electronic ignition.

 

[rickou812]

Re: Wire schematic for 1962 rude. available?

Beats me. My little motors have not had one. All of my 40 HP's have had them. I assume that the real new ones have an over-rev cut out in the electronic ignition.

Maybe they are specific for the model of motor. I think was produced from 1962 to ?65/66 and came in 28, 33, and 40hp.
Never the less, it is good to know that this item can be the cause of a single cylinder misfire..