hydroelectric reverse issue '71 johnson 50hp

[1961glastron]

i'm having issues with this reverse on my hydroelectric shift johnson,,,i know theres alot of info on here covering it already but not really helping out much,,i already tested the switch in the control box(all good)i checked the 2 wires going to the lower(all good as stated in the other posting)I noticed today that forward works good ,,nuetral works good,,but when on the hose reverse works but when throttled up alittle it kicked out till throttled bad down,,,when in the water i get nothing in reverse,,i'm gonna do the jumper wire test in a minute and see if that helps but i dont think i should use the hose but to use a barrel instead cause of the pressure of water,,i can here the sylonoids working,,yeah i'm runiing type c unit oil also,should i drop the lower and look around some if the jumper dont helpdo the sylonoids ever stick or the pump get gummed up cause the las owner put hi-vis lube in it right before i bought it please help me out,but i switched it all out to type c

 

[boobie]

Re: hydroelectric reverse issue '71 johnson 50hp

Not saying this is the problem, but the screen in front of the oil pump could be dirty or the plunger in the pump could be sticking or the oring around it is worn.

 

[Daviet]

Re: hydroelectric reverse issue '71 johnson 50hp

I have seen the time when you could fill the lower unit with ATF and run it on the hose to flush and clean the lower unit internals. You must fill the lower unit with the type "C" after you drain the ATF out. Cheap to do, may or may not help.

 

[Joe Reeves]

Re: hydroelectric reverse issue '71 johnson 50hp

With the shift wires CONNECTED going to the lower unit..... check that the voltage going to both wires, in reverse, is actually 12 volts on both wires... NOT 10.0 or 10.5 volts, BUT actually 12 full volts! Anything less than 12 volts presents a problem. This can and usually is due to a faulty shift switch. This can be proven simply by disconnecting the shift wires that lead to the lower unit and running jumper wires directly from the battery to both of those those shift wires (at the same time). If with the jumper sires, you have reverse and do not otherwise (with the switch), then obviously a problem exists with the switch or wires associasted with the switch.

If the voltages are okay.... a full 12 volts on both wires at the same time (with the wires connected), do the following test.

Disconnect the shift wires that lead to the lower unit and take a Ohm Reading on both wires that lead to the solenoids in the lower unit. What readings do you receive? If memory serves me right, I think it should be about 8 ohms but if I'm incorrect, I'm sure (hopefully) another member will enter that information.

 

[1961glastron]

Re: hydroelectric reverse issue '71 johnson 50hp

i just did the ohm test just before reading ur reply,i got 5.9-6.0 ohms on both wire so is that telling me that the solenoids are both bad,,i also tested the switch from the box and it all was good,,then tested the wires form the box to the motor and was recieving 12.3-12.51volts on both wires,,,any ideas on them both going out

 

[orbanp]

Re: hydroelectric reverse issue '71 johnson 50hp

i just did the ohm test just before reading ur reply,i got 5.9-6.0 ohms on both wire so is that telling me that the solenoids are both bad,
...

Why do you think the coils are bad? That value is right in the ballpark! Electrically, the solenoids are fine!
Now, as mentioned before, do you get all the 12V on the coils? And does the plunger move freely?

Good luck, Peter

 

[Joe Reeves]

Re: hydroelectric reverse issue '71 johnson 50hp

i just did the ohm test just before reading ur reply,i got 5.9-6.0 ohms on both wire so is that telling me that the solenoids are both bad,,i also tested the switch from the box and it all was good,,then tested the wires form the box to the motor and was recieving 12.3-12.51volts on both wires,,,any ideas on them both going out

My original quote of the ohm reading was as I stated in not so many words a guess as I didn't have the book right at that moment. The proper ohm reading of the shift solenoids (as per OMC's manual) is 5 to 6 ohms, meaning your solenoids should be okay.

If you have the proper lube (Type C), the proper voltage (12v), and the solenoids both check out to 5-6 ohms, the unit should shift UNLESS someone has changed the height of the plungers within the solenoids, OR the wave washer is not installed on the top solenoid, OR some unknown factor exists within the lower unit.

Have you run jumper wires from the battery directly to the lower unit shift wires yet to see if that causes reverse to shift properly?

 

[1961glastron]

Re: hydroelectric reverse issue '71 johnson 50hp

yes i have jumpered the wires and it goes right into reverse,,,but it also does with the control box too but as soon as i put it in water i get nothing off the control box in reverse,,,,i need to throw it in the water and use the jumper wire to see if reverse will work that way,,if it does then what?

 

[1961glastron]

Re: hydroelectric reverse issue '71 johnson 50hp

update,,,i just tested the wires again from the starboard to the switch,,in reverse i have 12.35v to both wires as should,,,in neutral i have 12.35v to the green,,,but bout .5v to the blue(should have none here)when in forward i have 1.20+/-v to the green and .5v to the blue so that is telling me that the switch is faulty am i correct Joe,thanks for all the help

 

[Joe Reeves]

Re: hydroelectric reverse issue '71 johnson 50hp

update,,,i just tested the wires again from the starboard to the switch,,in reverse i have 12.35v to both wires as should,,,in neutral i have 12.35v to the green,,,but bout .5v to the blue(should have none here)when in forward i have 1.20+/-v to the green and .5v to the blue so that is telling me that the switch is faulty am i correct Joe,thanks for all the help

Disconnect the wires leading to the lower unit, then recheck the voltage action of the switch as you've done via the above quote. If you're still getting voltage to the wires when in forward and .5v to the blue when in neutral, then I would agree that something has gone wrong with the switch.

But before making that decision, run those jumper wires to the lower unit with the engine in the water to see if that results in having proper reverse action. If reverse is okay in the water with the jumpers.... that would pretty well assure a faulty switch.

 

[1961glastron]

Re: hydroelectric reverse issue '71 johnson 50hp

will do,,,i also was told to hook the wires up and fire it up,put it in reverse and check my voltage at the starboard,and he said he bets its not reading 12v cause of the switch having an open circuit,,i also ran a jumper to them both today and had my bother in law snap the throttle pretty hard and it stayed right in reverse,,and it wont do that with the forward controls

 

[1961glastron]

Re: hydroelectric reverse issue '71 johnson 50hp

i have also checked the connections about ten times and still getting the same readout,,i always like to be sure of things like that,,thanks joe ur the best,,,i will have another switch tomm hopefully and will post an update

 

[FISTer]

Re: hydroelectric reverse issue '71 johnson 50hp

Any more updates? Just found your thread, and I'm having the exact same issue on the same motor.