Burning up shifting coils

[Tomcat4621]

I have a 1970 model 60Hp Evinrude and I've already burned up three neutral coils. what I've found out so far is that when I turn on my key, I have 12 volts going to it.When I start it up, I get approximately 60+ volts and even more when I open up the throttle.Can anyone tell me whats wrong?Thanks.

 

[rodbolt]

Re: Burning up shifting coils

your clipper circuit is fried<br /> its feeding stator voltage directly to the coil. not long after that they fry. there is an old tech bulliten about it and how to remove and bypass the clipper . looks like a blob of poo near the flywheel. maybe Joe Reeves will remember how. out of memory I cant.

 

[R.Johnson]

Re: Burning up shifting coils

I'm lost with the neutral coils! what are they? Where did you pick up that 60 volts?

 

[rodbolt]

Re: Burning up shifting coils

R>Johnson<br /> the hydro electric units use 2 solinoids to control a set of rods to close hydraulic valves and move the shift clucth with oil pressure. one coil energized is neutral, both coils is reverse. no coils or a fried coil will give ya fwd gear<br />its a suprise at docking sometimes come in hot and grab for reverse with some throttle and find its still in fwd almost as funny as watching the old "dock buster" mercs coming in .

 

[R.Johnson]

Re: Burning up shifting coils

rodbolt: I still have a 1972, 125 hydro-electric shift engine that I have been running for a good number of years, I know how they work. 12 volts to the solinoid is all you are going to get from the battery, and where can that 60 volts come from, along with the amp's to destroy that solinoid. You need a dead short for those kind of amp's. This does not ring up right. That clipper circuit protects the pulse pak from a voltage spike from a bad ground, or a bad battery with an internal short, or an intermittent open. It is not going to shoot 60 volts, along with the amp's to destroy that shift solinoid.