Dumb Question on Evinrudes..

[MTboatguy]

Well I am still having problems after doing all of the troubleshooting and parts replacement on my '73 Evinrude 50 hp Model 50373, I am wondering if there is a seperate kill switch on this motor I am not finding, I have the 73 controls on it with the key switch but I am not seeing a kill switch besides the key on off start positions, I keep reading about a clip, but don't see one, so perhaps it is not on this motor. Compression on my tester is 95 pounds upper and lower cylinder.

I am confused to say the least, new power pack, both coils check out, turns over fine with plenty of speed. I am starting to think I just won't be able to get it on the water this year...

Thanks guys.

 

[Bosunsmate]

Have you disconnected kill wire to power pack and retried?

 

[MTboatguy]

Have you disconnected kill wire to power pack and retried?

Yup, have done that a couple of times just to double check, still no spark. I am really confused on this one.

 

[flyingscott]

You should not have a lanyard on that control box so no extra switch. Have you tested the key switch? Do you have a wiring diagram?

 

[Vic.S]

ITYWF that the manual start version has a simple push button stop switch but that the electric start version is stopped by turning the key switch to off

disconnecting the black/yellow wire from the powerpack should disable the stop function of the key switch and any additional safety kill switch which has been added.

You may find the wiring digram in the manual on the Boatinfo website useful
http://www.boatinfo.no/lib/evinrude/manuals/1971-1989johnsonevinrude.html#/622



























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[racerone]

Compression should be way higher.----Test with another gauge.

 

[Joe Reeves]

Having just 95 psi compression on a 2 cylinder 50hp model indicates (to me) possibly that one of two (or both) problems exist............

1 - Either, regardless of how fast you think the engine is cranking over, it is not... and the slow cranking rpm would be responsible for the low reading of 95 psi... PLUS... It is a fact that the engine must crank over at least 300 rpm in order for the stator to generate the proper AC voltage to the powerpack's capacitor, needed to energize the powerpack.

With the spark plugs removed in order to obtain the highest cranking rpm, check the spark. If no spark via the electric starter... crank it with a rope. It'll be cranking over a shorter amount of time BUT via the rope method, at a much higher rpm rate.

2 - If the quoted exact psi reading of 95 psi is indeed exact... one cylinder duplicating the other... that usually indicates that the head gasket is faulty between the cylinders resulting in a bleed over from one cylinder to the other.