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Motor tilt cylinder cap is stuck

Old 11-25-2018, 04:45 PM
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Default Motor tilt cylinder cap is stuck

One of my motor tilt cylinders is leaking hydraulic fluid from the top so I ordered o-rings to repair both of them. I bought the wrench designed for removing the cap and they seem to be on there pretty tight. Is it ok to apply heat to the cap where it threads into the cylinder? This is a 2005 Mercury Verado 200.

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Old 11-25-2018, 04:49 PM
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we ended up having to use a breaker bar and that tool... seemed like the cap would never come off but it did. the problem we had was keeping the tool level with the cylinder, it was definitely a two man job. we broke two pins and ordered replacements. eventually we won and the cylinder does not leak anymore.
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Old 11-25-2018, 04:59 PM
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Pretty common problem. Why they cannot come up with a better system to get the caps of is beyond me. I have the same tool, it works but you still need a few tricks.

1) Soak with PB blaster for a day or two. Just spray around the entire cap perimeter, some should find its way in there. However the trick to this is give it time and let its do it job, not an instant fix.
2) It's a 2 man job most times. That tool doesnt not like to stay level with the cap. You will need an extra set of hands as said above to help keep it pushed down flush to the end cap so the pins dont pop out
3) Cheater pipe on the breaker bar. Sometimes this works sometimes it doesnt, if its really stuck you will most likely pop the pins out of the cap even if someone is holding it down.
4) Best solution I have found is take that tool alone, no breaker bar or ratchet. Simply put the tool on the end cap and take a hammer and begin to hit the side of the tool to turn it counter clockwise. This is like an impact wrench and SHOULD work.

Not sure if you can heat it, I always shy away from heat on outboards.
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Old 11-25-2018, 05:03 PM
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Watch the video that Marine tech Tools has on YouTube. They show an air powered tool you can use. It is destructive, but you can order a new cap for cheap and can make the air tool yourself with a grinder. It is 100% easier than a breaker bar.

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Old 11-25-2018, 05:06 PM
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Make sure system pressure is relieved. Use a hot air gun to heat the cylinder. Use some dry ice to chill the cap.

A piece of PVC pipe can be split to go around the tilt ram to hold the tool firmly onto the cap. Apply torque and hold it for a period of time. The cap should start to break free.
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Old 11-25-2018, 06:07 PM
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These all look like great suggestions, thanks to everyone who replied!

Neither of us know why my wife has a can of PB Blaster, but she did, it was in the laundry room. I went out to the boat and sprayed that on the caps to get the process started..
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Old 11-25-2018, 06:42 PM
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Even though the pins on the tool are offset from the square drive, couldn't you still use a low-torque electric impact driver with it to help convince unscrewing? Or possibly put a piece of wood over the cap and hit it with a hammer 1st to "get its attention?"

Is there an o-ring seal on the cap that could be affected by heat?
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Old 11-25-2018, 08:32 PM
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Most repair shops figure wasting hours on the cap costs more than just hitting it with an air chisel and replace the cap.
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Old 11-26-2018, 05:37 AM
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I saw a neat idea that should help

Raise motor up, Lock it with the manual lock, then lower trim motor a 1" or 2". This makes sure there is no pressure on the cylinder. Next cut a piece of PVC pipe to fit around the cylinder shaft and up against the motor and tight against the top of the tool, This should hold the tool down so it does not pop up and out and break the pins while you apply the high force that may be required to break it free.

I read about this trick as I was staring to research the same repair I need to do to my boat. I have not done mine yet. Trying to find someone that has a tool to lone me. Wish you were local I would help so I can learn and borrow a tool. There has got to be someone around that has the tool. Just have not found them yet

Good Luck.
Let us know how it goes.

PS. I need to do it on a lift over water, that always adds to the enjoyment of such tasks.

Highflier
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Old 11-26-2018, 06:01 AM
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Originally Posted by v12mac View Post
Most repair shops figure wasting hours on the cap costs more than just hitting it with an air chisel and replace the cap.
Not really, most boat owners get upset when we cut something that could have been saved. I'll grab an air chisel or grinder in a minute if something is stuck. And although most boat owners are scared of a torch, heat is the first means to free up something that is frozen. But for all of you do it yourselfers, grab that can of snake oil and have a blast.
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Old 11-26-2018, 07:45 AM
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Originally Posted by mikek3363 View Post
Watch the video that Marine tech Tools has on YouTube. They show an air powered tool you can use. It is destructive, but you can order a new cap for cheap and can make the air tool yourself with a grinder. It is 100% easier than a breaker bar.
I just did this, worked great but it did destroy the cap. $60 for an OEM replacement on eBay. The air hammer I bought came with a few chisels, and one of them was exactly like the one in the Marine Tech Tools video.
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Old 11-26-2018, 07:53 AM
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Do yourself a favor and order a new cap. High probability if its stuck on it will take some beating to get free.
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Old 11-26-2018, 08:00 AM
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I just did that job on the trim caps. I applied PB Blaster, tapped the caps on the top, then tightened the cap slightly with a breaker bar. Once I tightened it a hair, I was able to loosen them with no major effort.




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Old 11-26-2018, 10:07 AM
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Air chisel and a new trim cap. Those things are a nightmare
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Old 11-26-2018, 02:37 PM
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Must be "mystery" caps.

To backyardigans they are a PIA to remove. To a trained mek-a-nik they are a piece of cake.
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Old 11-26-2018, 05:22 PM
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Originally Posted by alloyboy View Post
Must be "mystery" caps.

To backyardigans they are a PIA to remove. To a trained mek-a-nik they are a piece of cake.
Can you help me? How does PB Blaster make it past the oring on the cap?
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Old 11-26-2018, 05:38 PM
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Originally Posted by Mud Runner View Post
I just did that job on the trim caps. I applied PB Blaster, tapped the caps on the top, then tightened the cap slightly with a breaker bar. Once I tightened it a hair, I was able to loosen them with no major effort.
Originally Posted by alloyboy View Post
Must be "mystery" caps. To backyardigans they are a PIA to remove. To a trained mek-a-nik they are a piece of cake.
Originally Posted by pstephens46 View Post
Originally Posted by alloyboy View Post
Must be "mystery" caps. To backyardigans they are a PIA to remove. To a trained mek-a-nik they are a piece of cake.
Can you help me? How does PB Blaster make it past the oring on the cap?

Think you have alloyboy & Mud Runner confused.

In reference to your question?
It doesn't unless the seals are broken.

As already advised: Air chisel
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Old 11-26-2018, 06:31 PM
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Originally Posted by pstephens46 View Post


Can you help me? How does PB Blaster make it past the oring on the cap?

It's not about the O-ring, it's to get to the threads on the cap.
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Old 11-26-2018, 06:53 PM
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Originally Posted by Mud Runner View Post
It's not about the O-ring, it's to get to the threads on the cap.
What he's saying is it has to get passed the o ring to get to the threads. Can't do that. Penetrating oil is not going to help here. It's time for the big boy tools.
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Old 11-26-2018, 07:57 PM
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Big-ass pair of knipex pliers and a new cap works as well if no access to air tools. I had to do one like that on my F250 on a trip once, but I own an auto repair shop, so I usually have all the good stuff.
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