1972 100 hp johnson stuck in gear

[irinka_85]

could any one help what should i look for when the gears are stuck and it doesnt go into neutral ?

 

[dew2]

Re: 1972 100 hp johnson stuck in gear

That is elec.shift Right? first you need power to the motor to shift.Do a search on this site,there are instructions of which wires to electrify for gears. But if its not shifting and no batt is hooked thats your first step.

 

[F_R]

Re: 1972 100 hp johnson stuck in gear

There are tons of threads on this site about the Hydro-Electric shift.

1. It must be full of the correct oil, and no water or grit in the oil.

2. It must be running in order to shift. It is not "Electric Shift", it is "Hydro-Electric" shift. It is shifted by hydraulic pressure provided by an oil pump. If it is not running, the oil pump isn't turning, and there is no oil pressure. The electric portion only works a couple of solenoid-operated oil flow control valves.

3. If it still won't shift, check out the electrical system.

4. If it still won't shift, the problem is in the lower unit.

 

[irinka_85]

Re: 1972 100 hp johnson stuck in gear

is there any way to by pass the green and blue wire that goes into the tranny ?

 

[TJShag13]

Re: 1972 100 hp johnson stuck in gear

The green and blue wires go to the solenoids that shift the lower unit. These intructions are from one of Joe Reeves posts:

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). 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.