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Removing Trim Tilt Piston Pin

Old 09-13-2019, 05:36 PM
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Default Removing Trim Tilt Piston Pin

I have been having a leak in my trim tilt system, so I bought a seal kit so I could fix the issue. I need to get the top trim piston out, but there is a pin holding it in at the top that I cannot get out. I have used PB Blaster, my O/A torch, and of course a hammer to get it out. Anyone have any suggestions or experience to help me out with this? There were two retaining clips that I removed, so there is nothing else mechanically holding it in as far as I can tell. I think the issue is galvanic corrosion between the stainless pin and the aluminum engine.


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Old 09-13-2019, 06:08 PM
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Trying to remove Yamaha tilt trim, bottom pin wont budge
Old 09-13-2019, 06:09 PM
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What motor is it? Bet itís a Evinrude/Johnson. When I had my Evinrudes it took me three days of PB Blaster, torch and a 3lb hammer to remove it. As long as you have the retainer rings removed it will come out. Keep going at it...it will budge.
Old 09-13-2019, 06:18 PM
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Originally Posted by 03Scarab29 View Post
What motor is it? Bet itís a Evinrude/Johnson. When I had my Evinrudes it took me three days of PB Blaster, torch and a 3lb hammer to remove it. As long as you have the retainer rings removed it will come out. Keep going at it...it will budge.
Ocean pro 225, I guess I'll just have to keep at it!
Old 09-13-2019, 06:34 PM
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Originally Posted by BostonWhalerSeaHunt View Post
Ocean pro 225, I guess I'll just have to keep at it!
make sure whatever rod you are using to pound the hammer against to knock the pin out is metal/steel. When I started pounding mines out I was using a thick aluminum rod and that didnít work well as the aluminum was absorbing lots of the strike force. Needs to be metal.
Old 09-13-2019, 06:40 PM
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Originally Posted by 03Scarab29 View Post


make sure whatever rod you are using to pound the hammer against to knock the pin out is metal/steel. When I started pounding mines out I was using a thick aluminum rod and that didnít work well as the aluminum was absorbing lots of the strike force. Needs to be metal.
I'm using a big steel rod, but I think that is absorbing a lot of it, I think I will go out and buy a deadblow hammer.
Old 09-13-2019, 06:47 PM
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Originally Posted by BostonWhalerSeaHunt View Post
I'm using a big steel rod, but I think that is absorbing a lot of it, I think I will go out and buy a deadblow hammer.
i used a very thick piece of rebar...worked great. The shorter the better too.
Old 09-13-2019, 07:00 PM
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1/2” bar stock held in place by a friend and a full handled sledge hammer removed mine.

Last edited by Bryan A.; 09-14-2019 at 05:54 AM.
Old 09-13-2019, 07:53 PM
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I ended up heating the aluminum casting as much as I could around the pin with a propane torch. Lots of hammering and penetrating oil as well. Finally budged.

Be careful not to mushroom the pin by hitting it with too large of an implement.

I used a large punch and a 3 lb. sledge. Over and over. With heat.

Now I keep it well-greased!
Old 09-13-2019, 08:22 PM
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Or you could just unscrew the gland cap and pull the unit off the piston, that is what I did on my Johnson 48 SPL. I guess you want to replace the seal in the cap so be careful when you take the piston off, all those springs and check balls in it go everywhere. If you do this be sure to push the piston a good way into the cylinder before you tighten the cap when you reinstall it. Otherwise you might damage the tip of the plastic relief valve that sticks out of the top of the piston. As they say. ask me how I know. Also replace the O ring on the manual release, all those go bad at the same time.
Old 09-13-2019, 08:38 PM
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Ok I have another question, does the actual piston come off the shaft? It doesnít for the lower pistons but I donít see how I can get the cylinder out of the cap unless it doesnít. I canít weld stainless so I would have to take it to a shop to weld the top piece back on if the piston doesnít unscrew.
Old 09-13-2019, 08:39 PM
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My manual release valve seized up a very long time ago.
Old 09-13-2019, 09:40 PM
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When I had my Evinrudes, I removed the entire unit and sent it to a guy in Port Richey that rebuilds them. Donít remember what he charged but hereís his info: https://five-star-marine.myshopify.com/

He was knowledgeable, fast and provides warranty.

make sure you have a wedge thatís holding up the motor as you pull the pins.
Old 09-13-2019, 10:57 PM
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Mine is a small single piston unit but yours should be similar. The piston is held onto the rod with a nut. It requires a good pull to break it loose. I used a three ft piece of pipe on my pull handle. Check YouTube for videos, I found one that showed one like mine being taken off and re installed. Good luck.

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