Mercury Outboards: Lower Unit Locked
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- Опубліковано 24 гру 2019
- Silver Block came into inventory with the lower unit completely locked. In this video we do a procedural walk-thru to diagnose and repair the lower. Tried pulling the oil seals first so the carrier would not be disturbed. Will the oil seal removal work? Why is it locked? Here are the results. Enjoy.
I remember not having the right tools back when I had a bobcat and tipper.
Your work area is a testimony to your professionalism. Very well organised Sir.
Like the puller, I wondered what it was going to like, one I'll send you a photo of my work station when I finish all the other stuff.
You nailed your autopsy! Just think what the average person is actually buying when they don't know.
Bobby P
I'd love to see you putting it all back together! Merry Christmas!
Happy Holidays Jason!
Thanks for doing this video, as I have been stuck with the same problem. Unfortunately I couldn’t get the round nut out as easy as you! But that’s another story. I couldn’t figure out why it happened until you mentioned the seals, I now understand the how now the next is finding the parts which are becoming rarer in Australia. Most appreciated it.
What is exactly the issue?
I have been assisting my neighbour with his 50 hp Mercury and when he bought the secondhand boat, the leg had been already removed. The motor was complete. He assumed that the previous owner had removed it to replace the impeller. The drive shaft and prop shaft were seized solid. I drained the leg and more water came out than gear oil! I removed the round nut which was seized by using a dremel tool to cut the ring and I’m just about to remove the prop shaft. I expect with all the water it’s probably a write off and he’ll have to buy a reconditioned leg, but I’ll get it apart anyway first. Thanks for your response, I appreciate it.
Just replace the crown nut and all of lower seals. Money saved. Son
Awesome custom carrier remover!!
Your videos are so helpful keep it up I have a 69 thunderbolt with lots of issues
Excellent video thank you!
Thank you. Son
Hi! Do you have forward a reverse gear for 2020 90hp Efi mercury outboard?
I like the carry bearing puller
I enjoy your videos. Thanks for making them. They inspired me to work on my Mercury. It's a '87, 90 HP that I got from a friend that was headed to the trash. It was seized. But compression is good. I un-seized it with Sea Foam and have been taking apart the lower unit with the intention of replacing gaskets, bearings and rings. Thanks, for your tip on removing the bearing casing. I got that off with a make-shift puller but I can't get the propeller shaft out. Any suggestions? The gears appear to be in neutral. Drive shaft and propeller shaft turn. Thrust washer seems fused to casing. I have applied heat to the outer lower unit casing but with no luck.
Are you trying to get the prop shaft out or the propeller off?
@@MerCSonL6 Thanks for your quick reply! I got the propeller off: no problem. Trying to get the propeller shaft out to check out gears. Basically, trying to disassemble lower unit to make sure all gears are good, nothing is damaged by rust or wear, and replace everything that requires it and lubricate everything appropriately. In your video on the three lower units, it looked liked the propeller shaft comes out relatively easily (after releasing the bearing casing). Another issue is the shifter doesn't seem to engage gears. I've taken it out but can't seem to see a problem. But I am hoping to figure out that problem once I can get the propeller shaft out. Any suggestions are appreciated with getting the propeller shaft out. Thanks.
I'd love to see a video and replacing the seals in one of these. I can't find any on UA-cam. And the seal on the shift lever.
Seals are easy. Son
I would love to have you put my old 74 merc 650 lower unit back together. What would cause my main driveshaft that goes into powerhead not to spin. With the prop shaft and internals removed? Love your videos.
Is your lower locked up?
Great video as always. There’s one thing I don’t understand however. When I try to use a puller like the one you got, I can’t seem to keep it centered on the top of the prop shaft. As soon as I start applying enough pressure and the chains get taut, the threaded puller shaft will start bending to one side and after a while it slips off the top of the prop shaft. How do you keep it straight/level while tightening it down?
The length of the chains ⛓ has to exact. Sounds 1 is off and it's causing you grief. Hope this helps. Son
@@MerCSonL6 Nah mate, it’s not that. They are the same length alright, and the puller is not leaning “left or right” but rather “backward and forwards” , ie in the two directions where the chains aren’t attached (it’s a two-armed puller).
@@xy8691 ah, perhaps try a 3 chain pulley?
nice work, thank you for sharing, question ? Do I have to take the lower foot to take out the gear like you did. Thank you
You do not. It just makes it easier. Son
@@MerCSonL6 oh thank you. I did took it out and found out that the plastic nut is stripped so when your put in reverse. It push the nut right out so it won’t go into reverse, the spring is so stiff that it pushes right it out. Also no keys on the gear shaft. Thank you for the reply. Much appreciated
Does anyone know what the part # is for the bearing carrier?
Checking it out again
Hi great video just a question i have a 210 Quintrex legend center console boat with a 60 hp Mercury engine i think its a bigfoot its hard to shift in to gear i have taken control cables off and it shifts smoothly so must be at the engine end any ideas i can do to make it change smoother thank you
Change the shift cable my friend
@merCSon L6 i have an mercury 850 and it runs fine on the flusher but when you put it in gear it just bogs and dies.. I cleaned carbs and changed spark plugs at no avail. I was thinking a link and sync and a fuel pump diaphram. Your thoughts? Its the coil pack motor
Sounds like its not getting enough fuel or needs a link and sync. Make sure you do not have any air leaks from the tank to carbs. Can also try turning each carb 1/4 turn out (together) to richen up the mixture. Let me know. Son
@@MerCSonL6 i got it dialed in tonight turns out it was the timing advance screw the previous owner had it set to 0° advance at idle
@@MerCSonL6 thanks for the reply man I'll let you know how it does in the water
I was changing my water pump on a 78 35hp evinrude and the driveshaft popped out. Now I cannot completely seat it back into the gearcase.
Gearcase might be stripped. Not what you want to hear but the crown nut should tighten the carrier. Son
@@MerCSonL6 Yup. Good and tight now with a new gearcase housing 💖
great video! What is best method to inspect gears for cracks when there is a prop strike?
Pull out the barring carrier and visually look for abnormalities. Son
@@MerCSonL6 magniflux or dye?
@@russbrown3159 bent gears... which is seldom. Son
@@MerCSonL6 thx
can you help me out Merc Force 40 go's into R but no Fwd says needs top mounts replaced? is this expensive to replace. what else can cause it not to go into FWD
Who said mounts need replaced? Top mounts have nothing to do with shifting.
number 9 wrench to work gear forward or reverse. I tried metric and US wrench. none fitted. Suggestion?
Vise grips. Son
Does the lower unit need to come off to pull the shaft and carrier out? Thanks!
I strongly recommend it.
And how far or tight should my thrust washer be on reverse gear should it be snug I'm going to go through your videos I'll be watching your play list one by one hehheeh
The thrust washer is the washer put on before the prop. No specs required. It keeps your prop from grinding on your lower. Son
i have a 150 optimax 1999..when i took out the bearing carrier the prop shaft stay there ,do i need to take out the shift rod to let the shaft coming out?? my shaft its bent and i need to change it,,
Typically, you do not need to remove the shift rod. Son
how you removed
My bearing carrier won't come out at all. I did the same trick as you. Idk if because you do fresh water boats or what? I use my boat on salt water.
Salt water destroys engines. Keep pulling, it will come out. Heat may need to be applied to loosen. Son
My 300r is a 2022. My shaft is ceased with transmission in reverse only. It is an electronic shifter What do I need to do?
Wires are crossed. Perhaps corrosion. Identify the issue. Son
Would you be interested in taking mine Apart...think its locked up case is banged up...bondo on side....its junk ..maybe can make video out of it..
Send it to me. Son
I'm at 12:45 still watching I want to be as good as you at this I'm getting ther
My 115hp idles rough and stalls once warm and when putting into reverse or forward help!?
Sounds like its not getting enough fuel or needs a link n sync. What year is your engine?
75
There can be many different reasons for your issue. We'll start with the "easy" first and work into the engine. Check the fuel lines and make sure there are no leaks. Verify that the fuel pump is working correctly. Timing will also need to be verified. Your primary pickup should be hitting the carb cam around 4-6 BTDC. Turn all 3 idle screws 1/4 turn ccw. Try and let me know if this helps. Son
Thanks for replying I found out it had a gas leak in a fuel hose now it idles just fine and doesn't shut off I did notice that it grinds when I put it into gear
Why not replace the bearing instead of the whole carrier?
Great idea. At the time I did not have extra bearings in my inventory. Just the carrier. Son
Quick question sir so the outer one numbers on seal should not be visible
Not sure what you mean. To seal the prop shaft you need 2 seals. One to keep the oil in and 1 to keep the oil out. No, you will not be able to see the serial number if installed correctly. Son
@@MerCSonL6 that's what I want to know if tou see part number it's facing wrong way
@@1luxuryliner440 correct my friend. Son
Hey Bobby own a 2010 mercury 60hp just recently my wife drove in a very sholloq water which sucked in a lot of mud etc. max mph I go was 20 mph not until about 5 attempts in getting started. When I shift to gear and spin the prop it makes a click noice can you help me figure out what. Need to do to get it fox or it’s it normal with it making the noice on both forward position and reverse when parked
Do you sell I do you have a 35 hp lower unit and is the serial number 6445902 what lower units can I use they say 35 40 50 I'm concerned about my gear ratio are the 40 50 lower units different or can I use one I'm in fb mercury group also and they have no anser yet thansk man I'm watch and learn from you
I have a 40hp lower if you need. Your email?
my prop shafts is stuck and not coming out
Seized?
Anotha good video...Makes me want to rip my lower apart and find out how bad it is bcuz it's locked differental dont turn...
cannot get her in neutral / drive shaft. Replaced water pump. was in neutral when lowered lower unit.
drive shaft now turns either way in gear however how do I get her in neutral ?
Remove lower and position shift anchor by the bottom left bolt on the exhaust Baffle cover. Manually put lower in neutral (prop should spin freely). Reinstall lower. Son
Three
Ha ha, he was keeping the water out and forgot about keeping the oil in.
Agreed. Son
Lol had a 115 evinrude sit for 12 to 15 years before i got it the shaft was locked just like that so i knew it was just caught from sitting so i toke a board an rubber hammer an hit it three times it got free an haven't had no problems with it 😂😂😂😂