Mercury Power Tilt problem

[Island_oki2000]

Anyone,

I got a boat from a guy on trade and the tilt does not work, it only clicks when you hit the up button and nothing when you hit the down button.

The one I have states only use with MERC 1400 and 1500. I have an 1975 850. When the guy went to show me the tilt he was surprised it did not work, said it worked about 2 months ago. The boat has been sitting for a year outside. When I took it out, I noticed all the connections, screws wire are very rusted and corroded.

COuld this be a simple fix of replacing the wires and connections?

ALso, I notices a bunch of oil mixed with water where the PTT is mounted, how do I check the oil level?

Thanks in advance for all the help.
Kyle
sniderr1974@earthlink.net

 

[Chris1956]

Re: Mercury Power Tilt problem

As far as I know, any PTT unit for the Merc 1500 will fit your '75 850 fine. Those motors share a lot of parts, including PTT.

That PTT unit should be 2 trim cylinders with brackets, 4 trim hoses and a pump/resvoir unit. The slotted aluminum screw on the top right of the resvoir is the fill point. Use 5W-30 motor oil or ATF, depending on what is alread in it.

Electrical issues are ususally due to bad solenoids, bad wiring or a bad PTT motor. Some PTT units had a single soenoid for up. some PTT units had dual solenoids. Disconnect the battery and check for contuity between the PTT motor green and black wire and the blue and black wires. Black is ground. Green is for down and blue is for up. If you have continuity on the PTT motor, it is likely the solenoids or more likely the wiring is corroded.

 

[Island_oki2000]

Re: Mercury Power Tilt problem

Thanks, before I go any more, I need to make sure I know what is the motor and what is the solinoid. If you have a diagram that would help me identify the parts, if not, if you have an e-mail I can send you some pictures of the unit.

Again, thanks. The fluid that came out of the unit was red, so I think that is ATF correct?

Kyle

 

[Chris1956]

Re: Mercury Power Tilt problem

The motor is the cylinder sticking out of the pump unit. The solenoid is teh small round electrical device mounted on the PTT bracket.

Red clear fluid is probably ATF.

 

[Island_oki2000]

Re: Mercury Power Tilt problem

OK, thanks, that is what I thought. Just wanted to be sure. How do you check each connection to see if they are good? Can I use a multimeter and look for a certain reading at each point?

Thanks for all the info.

 

[Berninger349]

Re: Mercury Power Tilt problem

Had this same problem a year ago.

Depending on the year, most PTT operate with the help of either a solenoid or relays. These are electrical components that operate the PTT. When you press up or down switch on the shifter, you are really operating the up or down relays. They in turn activate and send power to the PTT to do what you ask. They are linked together so that you can not activate the up and down simultaneously.

Check with your local marina for relay replacements. They are very common and he should have a generic to fit your outboard. You should replace both since they are linked together. Relays cost about $25 each.

 

[Island_oki2000]

Re: Mercury Power Tilt problem

Thanks for the replies,

I took the whole thing off and took the solinoid off and did as one suggested and put direct power to the motor and nothing happened. I opened her up and this thing was a mess inside, very dirty insode and very corroded. One of the wires, wich looked like it used to be connected to someting was rusted off. I think I read somewhere that I could take it to a place the rebuilds alternators and they could possible rebuild it. Not sure, I'm gonna take it to the marine dealership here close to my house and see if they can do something with it.

If you have any ideas, please share.

Thanks,
Kyle

 

[Chris1956]

Re: Mercury Power Tilt problem

That motor may have had a bi-metal overload switch on the inside of the casing. That is the debris you may be seeing. I would clean it up the best you can, and bypass the overload, to see if you can get it to work.

Alternatively, you may be able to buy a replacement motor and resevoir unit from ARCO. You will need to swap over the bottom of the pump resevoir to the new unit.

I recommend you try to locate the ARCO unit at a local marine store. Next remove the resevoir bottom, and note where the end of the motor armature is, in relation to the bottom of the pump/resevoir. Now you can see if the ARCO unit will replace it. The replacement unit may have an armature extender fitting as well, to adapt it to several models of pump.

 

[Island_oki2000]

Re: Mercury Power Tilt problem

Chris, there is a number on the side of the motor, looks like it was pained on, no engrave or stamped like that. I can read most of the number except for the last two numbers/letters. Any idea if that is the model number of the PTT unit? I'm gonna take the whole thing to the marine dealership and see if they might be able to recommend anything.

If I don't want to spend the money to rebuild this unit, what is your recommendation on a new pump. Hopefully one that would connect directly to the 4 lines already connected to the cylinders.

Anyway, thanks for your help.

I have another thread about my motor not idleing, if you have a chance and know what I can do, that would be great.

 

[Chris1956]

Re: Mercury Power Tilt problem

Look up the Part num of the PTT unit on the crowleymarine.com web site. Next get on the ARCO web site and see if they make an aftermarket replacement for that unit. You will need to swap over the bottom of the PTT unit (8-10 screws and a gasket), and control valve.

 

[Island_oki2000]

Re: Mercury Power Tilt problem

Thanks Chris,

I'll check that here in a few.

BTW, I took the boat out yesterday. Started pretty good, little choke and 3/4 throttle. Have to shift really fast into neutral then in gear to go. I didn't want to do that to much because it sounds like it could be bad on the gears. Anyway, after a little sputtering, she got up on plane and ran pretty good. But, she will still not go into full idle. There was a point where I could bring the throttle to about 1/4 and she was idleing real slow and smooth, in gear. But when I pulled all the way back to neutral, instant die. I tried to hit the choke also to keep it running and that didn't work. Gonna, look over the fuel lines to the pump and pull the carbs to clean them.

Also, I might have a starter problem, all day started and turned over fine, then the last time just before going in all it did was click. I thought it was battery, so swapped it out and still same thing. I tapped it, very lightly with a hammer and blame, turned over like no problem.

Any ideas?

Thanks,
Kyle

 

[Island_oki2000]

Re: Mercury Power Tilt problem

Chris,

Any recommendations for either rebuilding the trim motor or just buying a new one. I've done a search and a new one will cost around $600, but I can't find any info or pricing on a rebuild.

Also, I looked on the ARCO marine web site and their is no aftermarket replacement for my exact pump. Part number according to crowleymarine.com is 92975A32. The old number is 64461A1. If anyone has one for sale, please let me know.

Is the another pump out there that takes 4 hydralic lines and possibly same wiring that could be used as a replacement. I know the one I got is more power than what is needed, it sates for Merc 1400 and 1500. Since I only have an 850, I could probably uses a smaller unit.

Thanks,
Kyle

 

[monk-monk]

Re: Mercury Power Tilt problem

Heres the best thing you can do...there is a guy on ebay who specializes in these pumps, I believe the ebay ID is fuller4099, he can supply just about any pump or pump part that you need. I have several friends that bought pumps from him and they worked great.

 

[Chris1956]

Re: Mercury Power Tilt problem

I really thought ARCO or some other aftermarket pump would fit.

Try the rebuilder. He will be much less than $600. I have an entire PTT system to fit that motor. I cannot vouch for it's quality, however.

 

[turbinedoctor]

Re: Mercury Power Tilt problem

I had the same problem about two years ago, rebuilt it myself and haven't had a problem since. Here is where I got my parts.

http://www.mercruiserparts.com/Show...esc=HYDRAULIC+PUMP+ASSEMBLY+(METAL+RESERVOIR)