Trim and Tilt problem - What is this noise?

[BOAH]

When I use the trim and tilt, it makes a noise that I don't have a clue about. To hear it, watch the attached video. The noise happens at the 20 second and the 30 second mark in the video.

[video]https://vimeo.com/user3430902/review/91510804/5f99dbf62f[/video]

Also, I have a leak at the top of the tilt piston. Is this hard to rebuild?



I've cycled it and have tried adding fluid a number of times but it seems to be getting worse.

And I know that this isn't an Evinrude or Johnson but the the mechanics have to be pretty much the same on these units and the people in this forum are much more responsive than the Yamaha forum.

Thanks for your help!

 

[phillnjack2]

Re: Trim and Tilt problem - What is this noise?

first off it sounds like you have air in the system, so it needs to be fully up,cochoked up in place then open the filler cap and top it off.
leave it like that for about 15 mins before putting cap back on and lowering it down etc.
also the noise could be from a semi-corroded main tilt tube !!!!.
have you greased the main tilt tube ? it could be that its going rusty and getting caught up at a certain spot.
this would explain why it does it at both ends of the tilt cycle.

just a thought. i would look at tilt tube as first port of call.
if corroded by a new one made of stainless and fit a grease cap on the end to keep it all nice.

could be wrong but well worth checking it out.

phill

 

[BOAH]

Re: Trim and Tilt problem - What is this noise?

Thanks, Phil

That definitely helps with the noise temporarily but it seems to keep happening. That's why I'm thinking about putting in a seal kit. That top seal in the tilt tube is definitely leaking. How hard is it to do this? I haven't found a lot of good instructions on it for some reason. I have a Clymer manual and it tells me how to rebuild the motor but just about nothing on taking the tilt assembly apart.

Thanks again

 

[BOAH]

Re: Trim and Tilt problem - What is this noise?

bump....

 

[71Windsor]

Re: Trim and Tilt problem - What is this noise?

Definitely sounds like air in the system. As far as rebuilding it goes its a basic hydraulic piston on mine I drained it out propped the motor up to keep it out of the way. You will need a micrometer the new packing kit which typically includes seals and o rings the rebuild kit will include all the needed parts. You will need the appropriate spanner wrench try to stay away from pipe wrenches as they can bent or twist the casing once you separate the top cap from the cylinder you will need to use the micrometer to verify how much wear if any has occurred. Take reading at various places on the piston and rod the inner case to the cylinder the hold the piston exits at the top. Knowing the OEM specs would be helpful if you can find them if not a good rule of thumb is to check multiple places and hopefully all your reading for that area are very very close. For example I would measure the bottom of the rod the piston is attached to the part that doesn't exit the cylinder as this will have the least wear and then work your way up. Once you verify you dont have any bad wear or bends. Clean everything up you do not want any particles of debris between your cylinder and piston other wise you will destroy your new parts.
Remove the old o rings seals and any nylon wear rings that may be present and replace with new. Be careful when you put the new on if you knick them they will be useless. Put the piston back in fill to capacity allow it to sit making sure all air bubbles work there way out check and top off as needed. Its very straight forward heres a picture of what to expect when you crack that puppy open. You'll see the rod piston o ring seals ect. But this will give you a heads uo for what your going to be seeing. This is not yours exactly just a generic picture of a cylinder I found.

 

[BOAH]

Re: Trim and Tilt problem - What is this noise?

Thanks, 71Windsor

When you rebuilt yours, you just lifted the motor to keep it out of the way and and didn't mess with removing the entire assembly, correct? Doesn't sound that bad.

I'll give it a shot. Thanks for your help!

 

[71Windsor]

Re: Trim and Tilt problem - What is this noise?

Correct once I propped the motor up fully and drained it of hyd oil I pushed the ram all the way back down into the cylinder to allow for more room to squeeze past my engine. Now I can't say for sure you will have enough room to do the same because our engines are different. But by the looks of your photo you'll be fine doing it the same way. Just make sure that cylinder you leave behind gets cleaned thoroughly and capped off I used a Ziploc bag and duct tape to make sure nothing got I there including moisture.

 

[BOAH]

Re: Trim and Tilt problem - What is this noise?

And what did you use to clean it?

Thanks

 

[71Windsor]

Re: Trim and Tilt problem - What is this noise?

As long as there is no large debris or rust which there shouldn't be unless you have taken it apart and left it exposed. I take a lint free cloth wipe it down very well I dont generally like to use any solvents when I clean mine unless there's buildup some where. If there is you can use some thing like 2+2 carb cleaner I actually prefer CRC electronic cleaner to remove light oils like in this application because it dries fast and has very few abrasive components in it. If you decide to use any type of degreasing / cleaning solutions make sure prior to installation of your rebuilt cylinder you apply hyd oil to all the surfaces saturate the inside of the cylinder and the ram / piston. Some people will apply petroleum jelly on the o rings to help get the piston back into the cylinder do not do this unless you absolutely think your going to damage the new o rings and seals when putting it together. I put the new o rings and seals on the piston and soak them in a container of hyd fluid for a minute or two then slide it back into the cylinder.

Again try to stay away from putting any type of petroleum jelly, or any other grease on the new parts. Reason being after the install that grease has to go some where and wont mix with hyd oil. Also those compounds are much heavier weighted then oil and could actually create a small gap in the seals which would allow oil to pass from one side to the other of the piston and this will cause the hydraulics not to hold there position.