Chrysler 115HP - Installing new tilt and trim

[dan1979]

I recently bought a 1980 Chrysler 115HP outboard. The motor has Tilt & Trim but it needed replaced as the original was beyond repair. I bought a new unit from outboardparts.com and unsure how to set up correctly.

Below is a picture of the trim motor/reservoir I bought. Connecting the wires and hydraulic lines seems simple, but I'm unsure if I have everything I need. Do I simply take the top (or cap, that has the 4 screws) off the old one, connect hydraulic lines, and fill new one with hydraulic fluid?

Any help on this would be greatly appreciated, this is my first run at working with installing a new Tilt & Trim motor.

Thanks,

Dan

 

[RRitt]

Re: Chrysler 115HP - Installing new tilt and trim

that's not quite the right motor. see how the reservoir is longer than your original? That makes the oil tubes miss the ports. The stainless oil tubes are way harder than the aluminum valve body. You would not believe how many stripped ports I see from people who try to force the tubes to line up by using the threads on nut. so ... be careful not to strip your threads. bend tubing first. tube nuts should spin by fingertips until they are alomst all the way to bottom. get strong pliers and bend tubing if you need to.

otherwise, yes. exactly as you say.

 

[dan1979]

Re: Chrysler 115HP - Installing new tilt and trim

RRitt,

Hey thanks for the tips. Luckily, I didn't have to bend any of the tubing in order to match up male and female ends. But I did run into another problem. After I placed the bottom valve cap (piece that contains the female holes for the 4 hydraulic lines) and then tightened up the screws I gave it a test. Everything worked perfect.. So then, I went to tighten up the 4 screws that connect the bottom valve cap to the reservoir/motor and apparently I tightened 1 to much (didn't feel like it though) and fluid just dripping out. It seemed like the threads got stripped.

Is there a way to fix this? Also, how much hydraulic does it need? Do I fill it all so the reservoir is full, or fill it up until it reaches the pressure release valve that is located at about the halfway point on the reservoir?

Thanks,

Dan

 

[RRitt]

Re: Chrysler 115HP - Installing new tilt and trim

takes anywhere from a cup to a pint.

use a katsup bottle and squirt it into reservoir up to filler plug. run up & down a few times. lower fully and refill. If it stops raising about halfway up on the first time or two then it may need more fluid. Just keep going up & down and topping it off. Eventually it won't have any air bubbles and the fluid will be up to filler port.

 

[dan1979]

Re: Chrysler 115HP - Installing new tilt and trim

Thanks for the tips on fluid amount. However, I am unable to get a proper seal around the valve piece that connects to the reservoir. It only leaks when the motor is all the way down. One of the 4 screw holes acts like it is stripped near the bottom so I am unable to fully tighten. Does anyone have any suggestions on how to fix this?

I thought about using a different, slightly larger screw. Might be my only option.

Thanks

 

[RRitt]

Re: Chrysler 115HP - Installing new tilt and trim

put pump in vice - upside down - so that you can clearly see what is going on. One of four holes stripped out should not make it leak. If everything is right then it only take two screws to make a seal. Granted, they would eventually wallow out and come loose but for testing purposes you only need two.

 

[dan1979]

Re: Chrysler 115HP - Installing new tilt and trim

Before I installed the tilt trim motor I put everything together just to make sure it fit, it looked good from what I could tell. But the only thing that seemed odd was the size of the gasket.

On the valve piece that is screwed on to the reservoir there is a very small/thin rubber gasket that is in set a bit. Is there supposed to be another gasket that is flat? Much like a gasket on the fuel pump.

Thanks

 

[RRitt]

Re: Chrysler 115HP - Installing new tilt and trim

the gasket between vavle body and reservoir is an oring. It is very big of round and very small of diameter. I'm guessing here ... 3" around and 1/16" thick.

Did you use new screws? The original screws on chrysler were self-tapping. The aluminum reservoir was not threaded. If you used new machine screws then they may not be seated. Use original screws if you can. If not, then carefully tap out the holes (i think they are 10-24). Don't tap too far or you'll push out bottom of hole and/or crack reservoir.

If aluminum is stripped then get an oil tight seal with three. Once you have established this then take valve body off and wash out fourth hole with good solvent (acetone, phosphoric acid, naptha, etc). Use a dab of JBweld to build up a thread forming base and tap in some threads. Reassemble. When goiung back into stripped hole be careful not to use too much torque. The other three holes are doing the work. This hole is just balancing out the load a little. Maybe another dab of JB to make sure it stays in place?

 

[dan1979]

Re: Chrysler 115HP - Installing new tilt and trim

I was able to use the original screws. I do see a rubber gasket in the valve body, but is in-set a bit and is angled. Doesn't look like much of a gasket really.. I will probably take it apart again tonight and post up a photo.

At first, I put to much hydraulic oil inside the reservoir. I filled up almost all the way and then put it together. It operated fine, but later found out I only needed to fill it up the reservoir about halfway (just to the release valve). Would this have screwed something up?

Thanks

 

[RRitt]

Re: Chrysler 115HP - Installing new tilt and trim

you should not re-use the oring that goes between pump and reservoir. Try a hydraulics store. Wholesale is about 0.12 ea (bought in 100's). Mercury sells them F17522 ... but ... for $12.68 ea!

 

[dan1979]

Re: Chrysler 115HP - Installing new tilt and trim

This link seems right I guess.. There's no picture though..

http://www.boats.net/parts/detail/merc/M-F17522.html

I will also call some local shops to see if anyone has it in stock. Hopefully this fixes the problem. Thanks for all the help!

 

[dan1979]

Re: Chrysler 115HP - Installing new tilt and trim

Ha, just called a local shop and they have them in stock.... for a whopping $.75 each.. Its cheap, and glad to know I don't have to wait for a shipment. Thanks again for all your help RRitt, much appreciated.

 

[dan1979]

Re: Chrysler 115HP - Installing new tilt and trim

Hello,

Re-issuing a few day old thread here, sorry. For a quick recap of below; I bought a new tilt & trim motor for my Chrysler 1980 115. The tilt & trim motor has the reservoir built into it. (see pic in first post) When I first installed it operated fine, but I think I put to much fluid in it as it started leaking (quite a bit) where the valve body meets the reservoir, when the motor was all the way down.

Initially, I thought 1 of the 4 screws holes got stripped, but was told it could contain a full seal with only 2 screws in tact. I just took the valve body to inspect the gasket and all seems well. So I am confused as to why its leaking. It only leaks when the motor is all the way down, in the operating position. And I am now using the proper amount of fluid.

The O-ring seems kind of small, or thin. I attached a picture to this post, does that O-ring look correct?

Thanks!

 

[RRitt]

Re: Chrysler 115HP - Installing new tilt and trim

that is correct oring.

take motor & pump off of boat. place motor into vice upside down. put valve body onto motor. spin valve body until it drops down onto shaft. align valve body with side ports facing bracket. install screws.

 

[dan1979]

Re: Chrysler 115HP - Installing new tilt and trim

RRitt, thanks again. The process you described is what I did initially, the only difference is I didn't use a vice to hold the motor in place. When placing the valve body onto the motor I made sure it lined up with the shaft so I was able to make it drop down and become snug with the motor. The funny thing is, the o-ring looks great, no cracks or breaks.

Thanks,

 

[RRitt]

Re: Chrysler 115HP - Installing new tilt and trim

if you took valve body off while tubes were attached then it is extremely difficult to get correct seating again. My thoughts are that you tried to re-use an old oring and it leaked. You replaced the o-ring but did it while on boat and the valve body is not properly seated onto armature.

If not then your reservoir is probably cracked or bent. If so, then you need to find that same size o-ring in a four lobed quad-ring. If you use a larger size then armature can jump out of gear under load.

 

[dan1979]

Re: Chrysler 115HP - Installing new tilt and trim

When I put the valve body the motor was off the boat, the O-ring hasn't been replaced yet either. I will replace the O-ring just in case and re-install, hopefully this fixes it.

The reservoir looks in great condition, no cracks, and lines up perfectly with the valve body. Thanks for all your help RRitt