Replacing the tilt trim motor on a 2002 Mercury 90 hp outboard
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- čas přidán 29. 08. 2024
- As newbie boat owners (back in 2001) we didn't know to change out the zincs and the trim motor housing rusted out over the last 14 years.
Changing out the motor and motor housing was pretty easy and here's a shout out to marineengine.com for their site and service. I received the parts three days after I ordered them, and the site allows you to search by your engine's serial number. They also provide schematics for each motor system. Tell them I sent you and maybe they'll give me free stuff, who knows.
Don't forget to lock the engine in the up position using the tilt stop arm or chain it up before you start. And I'm not a mechanic, I just play one on CZcams.
Good video, I just changed one on Mer. 115 hp. One tip you might want to try when threading the wires from the new tilt/trim motor up through that split grommet is to thread one wire at a time through and put a bit of grease on the wires. It makes threading them through the grommet a lot easier. I also used some very stiff wire and shaped it onto a long thin hook and used to pull all the other cables and wires out of the way when threading the tilt/trim wires through. That way the tilt/trim wires came right up through with no hindrance from all that clutter in the way. It will safe you removing the oil tank.
For all those asking. YES you can remove the four screws without all the extra work of pulling the assembly. You need a long skinny 1/4” with a 5mm ball Allen head. I can do this in about a hour. You just have to dig in your tools for the right combo. A long 1/4” driver with a socket hole in the handle is best. Just put the two rear bolts in the housing and lower it down in place carefully. The ball allens may not necessary but help
While your method is fine, the two locking pins that were twisted out are sacrificial and designed to shear off. You use a large brass punch and hammer; and a firm blow to the end of the pivot pins and those small locking pins will shear off and allow the pivot pins to be easily removed. They are also designed for one time use and replaced with new when reassembling the trim unit. Learned this after completing the same project. Though I still wish I saw your video first.
I was thinking I needed to replace mine because it sounds awfully loud. But after hearing your new one I think its just the normal sound. Thanks for posting!
Do not do what i did by taking the trim unit off the vice and put it on an angle to so its easier to put more fluid in without it coming out and making a mess. My motor blew up like a firework. Cracked right by the screw in the resevoir. Believe because i overfilled it.
Service manual says fill up to the bottom threads of the resevoir.
Also always check/add oil when the ram is all the way up. Do NOT add oil when its in down position. How it works is when its down all the oil is in the resevoir. So if you overfill it and the ram goes down all the oil pumps into the motor resevoir and it will crack/explode. Only add oil on motor or on bench vise on leveled surface to prevent overfilling.
For those if you who missed it, the small black thing is the one protruding in the center of the underside of the trim motor, or could be left protruding near center of the pump. In case it's missing, the Trim Motor replacement part I ordered from Crowley Marine includes a spare of this shaft in three different sizes. The function of this is to connect the motor to the pump. You will definitely know that you missed this part when you assemble everything and filled up the Steering fluid /ATF, and you test the trim motor, the sound of the trim motor will sound much higher in pitch (which means it has no load) and the arm will not move. This simple means the shaft is missing. If this happens, just remove the fluid and unscrew the trim motor again and have this placed on hole at the near center of the pump that matches the shaft. Then put back the trim motor. Be careful with the rubber gasket alignment when putting back the trim motor. Make sure it's well sitted before tightening the screws. I hope this addtional information helps. Thank you
TheFritz423 for making this video. This really helped me big time! Cheers!
How do you know which pin to use?
@@Pet-Sets The right fit is the shortest spare shaft... the key in finding the right size to use is, when you assemble everything back, the shaft is long enough for the motor (upper part of the trim motor,) to reach the (lower part) pump and short enough to be able to assemble it all back and close it... this is a bit of a challenge too since the shaft should align perfectly to the hexed hole that spins the pump. I hope this helps.
Hello from UK,
Thank you so much for taking the time to make this video, it really helped me out. Geoff
I have heard from other sources on CZcams that the bolts holding the sacrificial anode are opposite thread… in other words, lefty tightie, righty loosie… could be why they broke off
good info. Thanks, guys like you make doing maintenance so much easier because you took the time to show us.
Thanks for this video. I built a special tool ( #5 socket attached to a #five allen key, after cutting the curved handle off and an extention) that allowed me to remove the four allen screws. This cut a lot of time. The only issue I ran into was the wiring, So I spliced the new wires into the old wires so I wouldn't have to pull them through the engine. Once its installed I did the fill /bleed, zip tie and your ready to roll.
This is great idea! I'll try it tomorrow.
Thank you very much for posting this video.. Replaced the motor in an hour 1/2.. The marina could not get to it for 2 weeks.
thanks for this video. I was able to replace mine. I followed your lead and changed mine in about an hour.
Glad to hear it! Happy boating...
@@TheFritz423bypass valve, do you mean the manual release valve?
Thank you for sharing your video. I believe it helped me to be to fix my buddies mercury tomorrow
Fingers crossed.
Thank you for the video.bottom pin was also FUN for me.
Bottom shaft (big pin) is what I am having trouble with. What did you get to help? Mine won’t budge even after soaking with PB Blaster and applying heat. I have removed the entire “anchor bracket” at this point.
Absolutely brilliant. Thanks.
Great video thanks. I’ve ordered the motor and will be attempting this over the next few days. 👍
I appreciate that. Just what I needed to see.
I appreciate you appreciating it. That is just what I needed to see.
Can take out 6 bolts at base to gain access to 4th alan bolt if necessary. Dont touch the pivot pins because have to buy new ones to replace.
Here`s a tip if you see a tube of GOO PRODUCT Theres Shoe goo ,, Marine Goo , Pool Goo many more find some Marine Goo They are in a toothpaste tube container hardware stores sell it Canadian product However using gloves spread Marine Goo all over the trim motor housing ELIMINATES this forever it`s like a plastic cast over top and stays hard till you remove it by doing a cut down the side like an egg shell .I added some of this to my lid for a sealent 15 yrs ago never had to open it again .
Replaced and working. Thanks for the Video. 👍🎣🍻
Glad to hear it, brother!
Great video mate. Well done and thanks
Thanks for the video. It saved me $$.
Great video, thank you for sharing
Hi Fritz, any helpful tips on removing the lower pin. I have the same system as yours and I cannot remove the lower pin. I’ve tried WD 40 as well as a punch with a 4lb hammer. It will not budge. I removed the whole assembly with the inner bracket, but I still need to remove the pin to replace the motor. Any tips would be very appreciated.
Punch it very hard. That solves my problems.
Thanks fritz that was perfect!!
Very detailed video on how to. Where did you purchase your pump unit? I have same tilt trim unit. Thanks
Marineengine.com, I also use boats.net
Excellent Excellent Video. Question: Can you just change the motor , without actually taking off the whole assembly?
Yes. I have done several. Biggest gotcha is rear allen head screws drop of tool and the gasket moving. Easy to overcome with Tranny Assemblee Goo. Dab will do yah.
@@herewegofans Hi, I am going to try to do just the motor replacement on mine without removing the whole assembly.. seems like allot of work. The only question I have if I am successful replacing in place, is how do you bleed the system with the piston ram still attached to the mount assembly? Thanks.
@@bartw1047 I was successful at completing without removing. And unit is self bleeding. On level ground, manually raise to max, fill reservoir with hydraulic oil, apply power, lower w key, raise w key until "whining". Check fluid, apply as needed to full. Manually raise, repeat until unit successfully raises to full height cut out. Motor swaps take about 45 mins and bleeding took me about 20 mins. Let rest 24 hours and recheck fluid level. Add fluid if needed and repeat if was very low on that check. Hope that helps.
Thanks great video
Muchas gracias estuvo muy bien explicado como remover el trim
Muchas gracias por tus lindas palabras!
Any videos of mercury 60hp 2 stroke possible 80s or early 90s
I cracked the reservoir housing of a brand new motor, I think by overfilling it. What is the correct procedure to replace the hydraulic fluid? VERY expensive mistake.
This just happened to me the motor basically blew up i also think by overfilling it
good video, thanks for posting.
Thank you!
Una pregunta mi power trim cuando llega arriba le cuesta un poco piensaba cambiar el aceite...cuanto aceite tengo que poner?
Any chance you have the part number on the new anode? Great video
Where did you buy your zinc plate from? I need to replace all my zincs i believe and also the trim motor housing is rusted through.
I buy mine from the local mercury dealer. They are cheap and OEM is always best.
Greg O’Hare thank you for your response
hi, I need your help, I have a mariner efi 4 stroke 40 hp but my trim is broken, what model can I order online, I've looked at many but I don't know what kind of one it should be, it's completely rusted
Find the serial number of your engine and input that at marineengine.com, boats.com, or similar websites. They all have parts lists that will help you identify the part(s) you need. Free and simple.
@@TheFritz423 thanks for your help you the best
I'm trying to add fluid as my last resource before I replace the motor. However the engine is stucked in the down position. I tried to release the pressure but the screw head is destroyed. I don't know what to do. Can't get to the trim motor at all.
I see what you mean. I assume the bypass relief screw is buggared. Have you tried hammering a chisel into it to open it? It's plastic...
I replaced the trim motor and had the hydraulic unit rebuilt on a mercury 40hp two wire tilt and trim just like the one you have. I filled the reservoir on the bench and installed the unit on the engine. In my inexperience and ignorance I didn't realize I should have bleed the unit and continued to fill until it worked properly on a bench. Now that it is on the boat is there a good way to fill the unit and bleed all the air out? You talk about a bypass valve, where would that be?
I think I may have been filling through the bypass valve according to your video.
Thank you!👌
Thanks for making and posting this video, very good. I was wondering if you did any diagnostics on the motor after you removed it? And, if you had long enough allen wrenches, could you remove the motor without taking the whole assembly off? (not that cleaning up the pins wasn't a good idea anyway)
The motor was fine, I replaced it because the housing was so badly rusted it was a matter of time before it ruptured. As far as I can tell they dont sell the housing separately.
You know, I read your post again and see now that I missed your point. I don't see why you couldn't remove only the housing except the rear Allen screws are tight against the transom.
HI, thanks for the video. After I replaced my trim motor and watched the video gone last time, I noticed you briefly mention the shaft adapter. I didn't know what these were for, but they came with my replacement motor. Where does the shaft adapter go? If nothing fell out of mine (like it did yours) could it be my shaft adapter is still in place? I just don't want to remove the new motor to put in a "shaft adapter" if i don't need to.
Where did you run the leads coming out of the trim motor? My new motor has 2 leads (blue and green) but my old has 3 (blue, green and black)
What size and year motor?
Merci pour cette vidéo 👍
Bon Jovi!
So my motor still makes noise when I flip the switch (sounds like it is turning) but the ram does not move. I can order a new motor online but I am not sure the motor is my issue, since it seems to be working. I can lift the motor by hand and the ram goes to full extension. Not sure where to go from here.
Check if the bypass valve (see video) is completely closed. If not the motor will run without effect.
@@TheFritz423 It is screwed all the way in so I assume it is closed. With it removed, the cylinder ram will still not move by hand. It is stuck in the down position.
drain your hydraulic oil and refill, symptoms indicate not enough oil
What was the problem/solution? (Mine does the same thing). Is not bypass and is full of fluid.
@@stevecrowley8906same problem as you, new motor fixed it even though the old one was making noise.
Oh wow....
What was the part number and how much was this part?
will good video, thanks for .
Foça Dalış Merkezi 6
My lower tri lobe pin does not have a head on it, how do you suggest removing it?
I would remove the upper trilobe pin, swing the whole assembly out and down, and punch the pin out from the top,
@@TheFritz423 The unit will not swing down very far only about 4 inches or so. I tried to punch out the tri lobe but I guess my punch was too small and split the tri lobe pin. Being stubborn I continued to try to punch it out but mostly enlarged the hole in the soft metal to the point that I can no longer see the pin. Now what. Drill it or perhaps take to a machine shop.
It appears the tri lobe pin was put in from the top down.
All I want to do is replace the seals in he piston as I have water in the unit.
@@grahamhardy1612 Ouch! I guess I would try to drill it out from the bottom and replace it. As long as something holds the swivel pin in place you should be okay.
hey mate could you please give me a link to where you bought the new unit.
cheers
MarineEngine.com
TheFritz423 what about the link for the part it’s self sorry mate
How long does it usually take to replace a motor trim.
To replace this one took about 4 hours. Of course I had never done it before.
Allen wrenches exist (HARBOR FRT) that are about 8" long with a 3/8 or 1/2" socket end that allows removal by reaching the back of the motor. Saves a LOT of time!
I have a 99 same process I expect.....
I tried this but I was unable to remove the unit from the engine.
Can I do this without removing the assembly? (Change the pump motor)
Someone else asked that same question- I think you could if you could get to the back screws.
It will rust anyway.
You can replace the motor without doing all you did.
porboysdream how so? Welcome your input.
I am trying to remove the Mercury 150-horsepower trim motor, but when I raise it by hand, the trim stops halfway up and stops.
Even after removing all hydraulic oil, stop halfway up.
Do I need to switch manually? Is there any other way ??
I'm not an expert, but is there a bypass valve on the base you can turn to open?
There are bolts with snap rings, though not exactly.
I've already opened it and moved it, but it does not move.
You need a better mechanic than me! Can I suggest you ask the question to Dangar Marine here on CZcams. He is a great source of boat engine repair wisdom.
Mr fix it🤘
0:10
What did the assistant do...?
😆
Technical advisor
@@TheFritz423
Hahahaha. 😆
How tf are you supposed to raise it up it the motor won't work :(
You'll have to turn the bypass screw on the bottom side of the housing and oomph it up. Otherwise you have to remove the upper hinge pin. Be careful!
Why would you not check the brushes while having the unit off🥱not sure what was the problem in the first place that you took it off🤔
I do not think that word means what you think it means.