Disengaging the PTT on 1975 135 HP Johnson

[jbailey07]

I have a Calco trim motor that does not function. I have cleaned and tried everything. Hydraulics work but the trim motor is bad. Instead of purchasing a replacement, what is the best route to disengage the PTT so that I can run it, until I am ready to install new? My thought was to remove the tilt and trim cylinders along with the motor and resivoir, and put a pin in place to prevent overtrim of the motor while in operation (like I did in the old days). Or is it better to leave the hydraulic fluid in place with cylinders and just seal up the resivoir? Will I have to remove the travel lock as well? Everything in place now is factory. Any help would be appreciated.

For the more "seasoned folks" did this PTT system have one or two solenoids for the PTT operation? My Clymers manual shows only one.

 

[emdsapmgr]

Re: Disengaging the PTT on 1975 135 HP Johnson

I'd be inclined to leave all the hydraulics in place and remove the lift bracket from the swivel bracket. These early systems only had a single solenoid, wired for the up movement only. (that's the movement that takes all the currrent.) The down movement was hard-wired directly to the switch on the dash. You can check out the factory exploded parts diagrams for this system at: epc.brp.com

 

[jbailey07]

Re: Disengaging the PTT on 1975 135 HP Johnson

I'd be inclined to leave all the hydraulics in place and remove the lift bracket from the swivel bracket. These early systems only had a single solenoid, wired for the up movement only. (that's the movement that takes all the currrent.) The down movement was hard-wired directly to the switch on the dash. You can check out the factory exploded parts diagrams for this system at: epc.brp.com

Great information. Thank you. Which one would be the lift bracket specifically?

 

[ezmobee]

Re: Disengaging the PTT on 1975 135 HP Johnson

You might want to check with an auto electric place (they rebuild starters and alternators) to see about having your pump motor rebuilt. Those pre-'78 TnT systems are tough to come buy and worth a pretty penny.

 

[emdsapmgr]

Re: Disengaging the PTT on 1975 135 HP Johnson

The lift bracket is the large, wide metal piece that spans between the two lift pistons. If is bolted to the engine's swivel bracket. You can see the diagram of the part at the factory parts list site, mentioned above.

 

[jbailey07]

Re: Disengaging the PTT on 1975 135 HP Johnson

Thanks for all the helps fellas. This board is very useful and full of lots of info.

I rebuilt the the starter motor myself and the tilt and trim ran for a couple of days, now its dead (bushings gone and several broke internal parts including ammature). No parts available to rebuild it. What would be the best method for modifying it to accept a more up to date version?

Would a stern drive motor and resevior work, and run the lines through the transom?
Someone previously had mentioned something about a stringer pump?

The way it looks, I would be able to mount a motor and resevoir in place of the old unit and hook up a couple of lines and I would be in buisness. My guess is that it can't be that easy or everyone would be doing it.

I have left everything intact, except the lift bracket. I removed it so I could run it the old fashioned way, however it is a very heavy motor. Going to need something soon as I am not built for that kind of excercise...lol

 

[ezmobee]

Re: Disengaging the PTT on 1975 135 HP Johnson

Send a private message to member RRitt, he rebuilds these and may have some info for you.