175 hp omc stringer electric will lock up in drive but not in reverse.

[cm96s10]

I have a 1975 omc electric stringer. I was on the water a week ago and the drive started to slip. Then stop slipping and start going again. then started slipping again. And then it locked up everything going from netual to drive. But reverse worked just fine.
So I reverse the wires next to the engine(the blue and green wires) and I got the forward gear working but if I put it in reverse it locks the engine and everything else up again

Ps I had the lower unit of the out drive looked at and resealed
That checked out good no problems.


Does anyone have any clue why since is happening?

Any help would be great

 

[southkogs]

Re: 175 hp omc stringer electric will lock up in drive but not in reverse.

Do you have type C lube in the lower unit?

 

[cm96s10]

Re: 175 hp omc stringer electric will lock up in drive but not in reverse.

Yes

 

[Roadrager50]

Re: 175 hp omc stringer electric will lock up in drive but not in reverse.

It sounds like you have a bad forward coil. There are two magnetic coils in the lower unit,one for the forward spring clutch and one for the reverse clutch. I am working on a 190 OMC in a 1977 Thunderbird Cathedral Hull. I have the outdrive off and am doing the same thing. I have to still get the waterpump,then I can tear into it and see what is there.

 

[southkogs]

Re: 175 hp omc stringer electric will lock up in drive but not in reverse.

I'm leaning the same way ... just don't know if I want to encourage you to crack into that thing just yet

No metal flakes upper or lower unit lube?

 

[cm96s10]

Re: 175 hp omc stringer electric will lock up in drive but not in reverse.

If I reverse the blue and green wires forward works. And reverse locks up
But no flakes or metal

 

[Redrig]

Re: 175 hp omc stringer electric will lock up in drive but not in reverse.

that has to be some electrical problem like your switch if it makes the reverse act up when you swap the wires.

grab a random wire and take it straight from your + battery to the F or R, green or blue lead (one at a time of course, never both at same time) and see if that fixes the problem, if it does there has to be an issue with your remote control.

also check the purple wire coming from your remote control and verify that it has a good connection on a switched 12v source.

EDIT - I am not sure if your 75 the power wire will be purple, it is on my 77. either way trace down the wire that powers the control itself, probably hooked to the Run position on the key switch.

also check the ground cable on the drive itself.

 

[southkogs]

Re: 175 hp omc stringer electric will lock up in drive but not in reverse.

I think - if you disconnect your shift wires from the drive. Turn your key to the "on" position, but don't start the motor. Push your throttle lever forward, you should read 12v on the green wire. Push your throttle back (reverse) and you should read 12v on the blue wire. You can test that up at the shifter too.

 

[cm96s10]

Re: 175 hp omc stringer electric will lock up in drive but not in reverse.

Sweet, ill try that ! If both wires have 12v in drive. Or reverse at the same. I should replace the controller? i remember. Seeing a purple wire under the dash t the front of the shifter switch.

 

[southkogs]

Re: 175 hp omc stringer electric will lock up in drive but not in reverse.

Sweet, ill try that ! If both wires have 12v in drive. Or reverse at the same. I should replace the controller?

Maybe. It'll mean you have an issue somewhere from the controller forward. I'd hate to see you not track the actual problem down ... hunt for a replacement controller all over the world and pay through the nose for the one you find, and then that doesn't solve your problem.

If you happen to find one, reasonably priced that you're pretty sure works ... grab it. You'll likely need it eventually, and it'll give you another to test with.

 

[Howard Sterndrive]

Re: 175 hp omc stringer electric will lock up in drive but not in reverse.

use an ohmmeter to test resistance from the blue/green knife connectors (unplugged from the controller harness) at the transom to ground (batt negative terminal). should be 5 to 7 ohms. Don't forget to make sure your ohmmeter reads zero when the probes are touched together- if they don't , subtract that not-zero reading from your measurement
A bad ground from the drive to the intermediate can cause both coils to engage, when you select one.
Make sure the stainless bonding wire is present and well connected between the drive and intermediate housing (clean connection), and greasing the trunnion bearings helps that electrical path too.