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  How can I keep my Johnson up?

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Author Topic:   How can I keep my Johnson up?
Jiles posted 07-20-2002 09:43 AM ET (US)   Profile for Jiles  
I have an 86 model Johnson with a Prestolite Tilt-Trim unit. How does this unit operate? The motor will raise and lower just fine, but will go all the way forward under power. Is it working properly?
mtbadfish posted 07-20-2002 10:15 AM ET (US)     Profile for mtbadfish  Send Email to mtbadfish     
Is this a chronic problem?
Jiles posted 07-20-2002 12:48 PM ET (US)     Profile for Jiles    
I have only had the boat for a short time.It is a 40 H.P. Motor I dont know how this is supposed to work. I think it is to raise the motor in shallow water and for adjusting the trim rod. I have raised the motor, and with considerable force, I can push the foot down.(VERY SLOW). In two outings, it worked the same. I can also raise the motor fully and the unit will not bleed down any over a period of one week.
Tom Byrum posted 07-20-2002 01:17 PM ET (US)     Profile for Tom Byrum  Send Email to Tom Byrum     
Try Viagra.
Jay A posted 07-20-2002 01:22 PM ET (US)     Profile for Jay A    
"How do you keep your Johnson up?" I have to agree with Tom ! But I would see your doctor first!
Hank posted 07-21-2002 12:38 AM ET (US)     Profile for Hank  Send Email to Hank     
I'm not sure I understand your description of what is happening. You say that you can raise and lower the engine allright but something happens under power.
When under power I assume your engine is down. What happens ? Does it move down more ?
Is that what you mean when you say the engine moves forward?
You further state that you can force the engine down, manually. There is normally a pressure release valve screw which would enable this to happen. The fact that you can move the engine down manually, without releasing the hydraul;ic prssure surprises me.
Perhaps this release valve is not closed all the way.


JohnAz posted 07-21-2002 01:10 AM ET (US)     Profile for JohnAz  Send Email to JohnAz     
i have one of those tilt trim units on a 40 and they leak down when under way when old,,probably a seal or an O ring,,i just use it to tilt the motor up and manualy adjust the tilt rod
whalersman posted 07-21-2002 01:46 AM ET (US)     Profile for whalersman  Send Email to whalersman     
My wife keeps my Johnson Up....
EddieS posted 07-21-2002 02:48 AM ET (US)     Profile for EddieS  Send Email to EddieS     
Personally never had any problems wtih keeping my Johnson up! Keep it well lubed and it should last you a lifetime!
Jiles posted 07-21-2002 10:23 AM ET (US)     Profile for Jiles    
When I said the motor goes forward, that is to say the foot moves toward the front of the boat. No Trim. When I try to Raise the motor, to get on plane, the unit will not move the motor. I have adjusted the screw and when I turn it counterclockwise, the motor will lower.
JFM posted 07-21-2002 10:32 AM ET (US)     Profile for JFM  Send Email to JFM     
My old Johnson does the same thing, it bleeds back in under WOT. Like JohnAZ, I just moved my stop bolt back.
Can you bring it back up after plaining at lower RPM's?
Bigshot posted 07-22-2002 10:16 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
You have to figure out if it is power "tilt" or power tilt AND trim? My bud had a 87 Yamaha that only had power tilt. Would not tilt engine on plane. Power tilt will usually just have one speed. Power tilt and trim will have slow for trim and fast for tilt.
frank_king posted 08-27-2002 10:24 PM ET (US)     Profile for frank_king  Send Email to frank_king     
also if the engine has only one "ram" in the midsection it is tilt only. if the engine has tilt and trim it will have one center "ram" and two little "sticks" to trim the motor with.

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