Shift solinoids

papion007

Cadet
Joined
Feb 28, 2006
Messages
17
Hi Boaters Please help..I am looking for the shift solinoids in the lower end of a 1969 55 HP johnson, Hydro shift.And is there a lot of trouble replacing them,or is it even worth it.<br /> Engine runs o.k. just no neutral.Also where around TERRELL TEXAS can I find a repair shop.<br /> <br /> Many thanks
 

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: Shift solinoids

Did you check for 12Volts on the green wire with the control in neutral? Here is a post by Joe Reeves on checking the electric shift soleoids. Maybe it will help.<br /><br />(Hydro Electric Shift)<br />(J. Reeves)<br /><br />The shifting setup of the lower unit is what's called a "Hydro Electric Shift", which is quite complex consisting of voltage being applied to solenoids in the lower unit which in turn change oil passages via a oil pump that supplies various pressure on a spring loaded shifter dog. The wires leading to the lower unit (at the powerhead) are "Green" and "Blue". The engine must be running or cranking over in order to shift out of forward gear.<br /><br />You CAN NOT use HI VIS lube in that lower unit. You MUST USE what OMC calls "Preminum Blend" lube, commonly called "Type C". (A thinner lube) <br /><br />In neutral, you need 12v to the "Green" wire. <br />In reverse, you need 12v to both wires, the "Green" one and the "Blue" one. <br />In forward, there should be no voltage to either wire. (The spring loaded shifter dog forces the unit into forward gear) <br /><br />To check the lower unit for proper shifting to make sure you have no trouble there, remove the spark plugs to avoid problems and to allow a higher cranking speed. <br /><br />This next step eliminates the actual shift switch in case problems may exist there.... Disconnect the blue & green wires at the knife connectors (the rubber insulated boots) leading to the lower unit at the powerhead, then using jumpers, take voltage direct from the starter solenoid to apply voltage to the "Green" wire for neutral, then both wires 'Green" & "Blue" for reverse (Remember the engine must be cranking over in order to shift).<br /><br />With no voltage applied, the unit should be in forward. No need for a ground jumper... the lower unit's already grounded. You may crank the engine with the key switch or by energizing the starter solenoid with a jumper wire.
 

papion007

Cadet
Joined
Feb 28, 2006
Messages
17
Re: Shift solinoids

Thanks I did the tests you said and all voltages were correct,I also checked the ohms at the leads going down to the solinoids,it was about 6-7 ohms on both solinoids.What else can I do.? The engine is not in a test tank,just earmuffs.Does it have to be in the water for the prop not to spin while in neutral.Thanks again
 

saxis

Petty Officer 2nd Class
Joined
Feb 18, 2005
Messages
100
Re: Shift solinoids

Quick question (not meaning to hi-jack though):<br /><br />Does this voltage test apply exactly the same to the Selectric Shift models also? Sounds very similar, but I don't remember seeing this detailed in my Seloc manual.
 
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