Yamaha Outboard Lower Unit Rebuild | Yamaha F225 Lower Unit Rebuild | Boats.net

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Find the parts for your Yamaha F225 lower unit rebuild here: bit.ly/Yamaha-outboard-lower-u...
Watch as we do a lower unit rebuild on a Yamaha F225 outboard motor. This is a complex process, and in reality it would make little sense to undertake this entire job from a financial standpoint. A unit with this much damage? It would be much easier to replace the whole unit.
However, we want you to see each part of this process in case you need to perform repairs on your outboard. In the video, John will start with an essential step: understanding the deviation from zero in the lower unit. This will allow you to fine-tune the position of the forward, reverse, and pinion gears so that they interact correctly using a range of shims. John will show you how to shim the lower unit to get the gears to the right place.
Then, we’ll install the forward and reverse gears and get the prop shaft housing ready for installation. Next, we’ll work on the input shaft and shift assembly. We’ll turn our attention to the output shaft and then get the prop shaft housing installed.
After we get the shift shaft built up and installed, the process turns back to the math. John will explain how you need to figure out the forward and reverse gear backlash and get the right shims for the pinion gear to position it correctly. This will involve a little work, since we’ll have to disassemble, reassemble, and then check components, but this is the best way to ensure the lower unit works properly.
See a diagram of the lower unit on your Yamaha 225 outboard here: www.boats.net/catalog/yamaha/...
Read how to do this job step by ste: www.boats.net/blog/yamaha/f22...
Need to know how to disassemble a Yamaha lower unit? Start here: • Yamaha Outboard Lower ...
See how an outboard lower unit works here: • How an Outboard Lower ...
Learn how to replace the input shaft seals on your Yamaha F225:
• Yamaha F225 Input Shaf...
Watch a Yamaha 225 output shaft seal replacement:
• Yamaha F225 Prop Shaft...
VIDEO HIGHLIGHTS:
Finding deviation in lower unit - 3:15
Finding shim size - 4:20
Installing shims and driving bearings - 6:40
Prop shaft main bearing installation - 8:30
Reverse gear shim installation - 11:29
Installing needle bearings - 12:10
Input shaft installation - 15:55
Shift assembly - 18:45
Output shaft installation - 22:50
Installing prop shaft housing - 23:30
Building and installing shift shaft - 24:10
Calculating pinion gear shims - 25:30
Measuring backlash - 26:00
Find Yamaha outboard parts here: www.boats.net/catalog/yamaha/...
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In the video we’re working with a Yamaha F225 outboard motor, but you may have similar steps for your Yamaha outboard. If you’re not sure whether these steps apply to your motor, leave a comment and we’ll get back to you.
RELATED VIDEOS
Outboard lower unit troubleshooting:
• Outboard Lower Unit Tr...
Yamaha 225 powerhead rebuild playlist:
• Yamaha F225 Outboard R...

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1 авг 2024

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Комментарии : 77

@chadhayes5016 Месяц назад

Sir, I have been a millwright for many years and I must say, I would consider this video and your practices to be of the most professional I've seen! You have my respect.

@cannedham3774 Год назад

John, I love watching your videos. I dont even own a yamaha outboard.. But I find myself turning into your videos just to follow your methodology when troubleshooting or making a repair. Thank you.

@havocsquad1 4 года назад

Well put video detailing the shimming process regarding lower units. Each manufacturer varies in how it is done, but the video does a good job showing that you can't just throw parts in and expect it to work.

@sprinter144 Год назад

I had to watch the whole video 3 times plus a couple places again to understand everything, but that’s only because I haven’t seen this done before. The video is well made. Great job!

@xxthewolfxx 2 года назад

@BoatParts --I just wanted to say this guy has a gift for instructing/teaching..I have known about him for a few years and always enjoy his instruction. -Just another wrench turner.

@reinhardtrippmacher8776 3 года назад

Wow, I like the way you are explaining this precession job! I am looking at this job soon. That was a good school! Thank you Sir!

@robertjackson7590 3 года назад

Excellent tutorial John.......... I've got a VMAX HPDI 250 that I'm getting mounted on my boat soon. I'll do the water pump, change the fluids, wiring the boat now. Again great job and keep it up.

@viperfukgoogplus386 3 года назад

Must be nice to work on a brand new unit untouched by salt water and corrosion. Thanks for showing the disassembly as well. 👍

@malikvouvilifvouvil2913 3 года назад

i've never seen amizing and good professor as you thank's

@joegarcia9221 3 года назад

This guy is such a badass!

@allanthomson4639 Год назад

thank you - watched again

@kaleblong9765 2 года назад

Helpful for me being a marine mechanic student

@andyvan5692 2 года назад

at 15:50, one solution, use a plastic "bung" (for sealing leaking fittings on boats), or a sprung steel sheet, rolled up, this forces the needles out, keeping them in position; the insilation of the shaft can push this out, and with the spring steel, this can be removed afterwards quite easily.

@KoldKillaC 3 года назад

Could you list the specialty tools? Also, a video on dialing in the drive shaft would be awesome! Thanks!

@geraldlacasse7986 3 года назад

Great video, very professional work! Just one thing. When you measure the backlash I believe, by listening the sounds that the measured backlash includes the ''slack'' in the clutch dog. Remember the forward. The prop shaft does not move but there is a slack between the tooths of the clutch dog and the tooths where the clutch dog 'bit' in the forward and reverse gears. Think about it and let me know!

@happysimeon7624 2 года назад

Pls sir need real details of the math

@briannoh620 4 года назад

John, thanks for taking the time to put together a informative video. I am in the process of rebuilding the lower unit on my F225 and must have watched your videos at least 5 times today to educate myself. Service manual is nice but it makes much more sense after I watched your video. Question: When measuring the backlash at the end, where do you measure the backlash in relation to the center of your drive shaft? Do you measure the radius of the pinion, add that measurement to the radius? Thanks in advance for the comment you might provide.

@chunkyfather29 2 года назад

John Tally is the Man !

@allanthomson4639 4 года назад

thank you - much appreciated - greetings and health from South Africa - I was looking for the concepts of shimming and found it, also looking for an online course that can teach me more on o/board maitenance+repair+shimming+gearbox setting+engine/powerhead electronics - any ideas?????

@happysimeon7624 2 года назад

Thank for this video because it help allot

@opticalinch 3 года назад

This is not a job you invite your buddies over to the garage with some beers to help you. Well done sir.

@TheTengkolokusang 3 года назад

Hi John. Thank you on your very detailed video.. love it.. i dont habe the shim guage yb 06439. Could you be soo kind to provide me with the measurement of the tools so i can fabricate the tools my self. Hope to hear from u soon..cheers

@TheDuffman1986 Год назад

Brilliant information, my engine wasn’t going forward, just into neutral and reverse, took the gearbox apart n fixed what I thought was the problem but after assembling it back it now goes into neutral and forward but not reverse, I’m starting to think it may be something todo with the shift shaft?

@ralphagbai9951 4 года назад

Could be kind enough to list the speciality tools required to get this job done. Thx

@evanpeters2885 4 года назад

Hi John. What if you wanted to take apart the gearbox to sandblast it. Will it just go back together perfect or will you need to redo the shimming.

@charleshooper3889 4 года назад

I have a 115ETLJ and in the rear I have a nipple 6E5-45378-00-00 with a hose 90445-07MF2-00 connected to it and is closest to the gear shaft. When I was changing the Impeller I had to disconnect this hose when pulling out the lower unit and was wondering what this hose connection was for.

@seanjordan5635 3 года назад

great video! where can I find that slide hammer you used to pull the reverse gear out of the bearing carrier? appreciate the great info thank you

@chrisminer5712 Год назад

This was a great video. I just had a prop shaft replaced on a 1996 Yamaha 200 and after the repair the prop shaft now moves in and out about a 1/4 inch...prior to the repair it moved 1/16 if at all (just enough to prevent binding). The marine shop didn't touch any of the forward, reverse or pinion gears so I am not sure where or how there can now be movement as there isn't any spacing difference on the output shaft, seals, etc. withing the prop shaft housing? Any thoughts would help as I don't want to run it if the movement has the threat of additional damage?

@joemarquez2915 2 года назад

Great tutorial, are you going to have one on a 250 pro sx in the future?

@kenlow4028 9 месяцев назад

Top gun mechanic. Did u find the needle bearing,

@ralphagbai9951 4 года назад

whats the name & part number of the yamaha special tool that measures beginning shim size for the pinion gear

@alexgonzalez98 4 года назад

I have a 1989 yamaha 90hp, I need to reseal my tilt trim. What spanner wrench works for those caps?

@janetgidius7817 3 года назад

while viewing this video when you were measuring backlash I noticed you didn't where the dial indicator should be located. It makes a huge difference where it is mounted. Out 1/4 inch or in 1/4 inch changes indicator reading drastically. On the yamaha tool there is exact mark for the indicator bracket. manual also gives exact height to locate indicator tool. I can't find tool. is there a way to figure out where it should be located?

@tunti23 2 года назад

Hi there, nice video, but... I have a question... The play between the dog and shaft do not affect the total play? How determinate just the gears play?

@Mr_Navil_Campo 4 года назад

I would like to see a video of a detailed mid section ( exhaust rebuild ) of a 4 stroke F200 f225 or any of those with corrosion in the exhaust!!

@BoatParts 4 года назад

We will be addressing that in a upcoming video.

@Mr_Navil_Campo 4 года назад

Boat Parts that would be great

@warrentphillips87 4 года назад

Do you not need to check backlash? Im trying to figure it out right now

@suhailriyami454 3 года назад

I have a Yamaha F250TXR 6P3 2010 make, I need a video of how to totally rebuild the low end. I'll appreiat if you could point me in the right direction if it is not the same as in a 225hp.

@listentovictor 4 года назад

Very informative video, unbelievable how prices these tolerances are. So what would cause back and forward (in and out of the housing) play in the prop shaft? I have one Yamaha F150 lower unit that has almost none and the other has quite a bit? The one that has plan in it, STBD side, it quite a bit noiser than the other one in general.

@randymoseman3698 4 года назад

I have the same question. I have a LU on a F250XA that has 1/4" of play on the prop shaft. I am putting on a new LU, but wondering what I am going to need to fix the old one to keep as a spare.

@Trapper_812 4 года назад

Can you get a whole lower unit for a 1987 Yamaha 25hp short shaft?

@batmanle428 4 года назад

If my backlash for forward and reverses is 22.71mm both is about the same measurement do I need to change my pinion shim? The 22.71mm is way off how can I get closer to spec ?

@sammontgomery2067 4 года назад

John I have a150 hp Yamaha with less than 200 hours. The prop shaft is bent .Can I replace the shaft and seal without messing with shaming Sam m

@yenealemmulatu6179 7 месяцев назад

I need for Yamaha F115AET lower unit rebuild.

@ttractortt5663 2 года назад

Hello, I have a 15 hp Mercury engine, when I reverse it makes a shock and seems to barely go, it tends to rise up

@mikeireland8032 2 года назад

Hi John, I have mercury out board lower unit on a inline 6 115 Hp, and they recommend loctite on the pinion gear. What loctite do you recommend the blue? Mike

@zacklennard2925 2 года назад

Im trying to rebuild a 2017 f70 lower and i have no idea where to find the gear shim tools i need or what the part numbers to them are

@raymorgan7177 17 дней назад

can we get a video on changing out the upper housing on yamaha 225 v-max 2003

@andrewbielecki7442 4 года назад

Hi - Great video! If just replacing a prop shaft (2013 F300) do you have to go through the shim process?

@geraldlacasse7986 3 года назад

In my opinion, yes. The prop shaft is held in place(in/out) with the reverse gear and bearing carrier. The distance of the final race is also involved. GL

@reelguy8856 3 года назад

Yes. 4.2 liter, all v8s and all counter rotating lower units you have to shim. All others if you are just replacing the prop shaft you do not.

@SD-unlimited 3 года назад

What if you’re just replacing the dog clutch? Any need to re-shim? 2001 HPDI 200

@marksimmo9968 Год назад

when you put the gearbox back on the leg does it need a gasket or it bolts straight on

@franciscomolina4871 3 года назад

hola el ajuste del eje vertical en un yamaha de 80cv como se hace un el cojinete solo limita el ajuste hacia los piñones un saludo

@BnShanhAkrmSalmBnShanh Месяц назад

احسنت اخي الكريم

@josevalovolovotikomailepan1215 3 года назад

Do you have the lower unit overhaul kit for ek40j

@ahmedafsal5780 4 года назад

Need detailed shimming video

@DCmite1 4 года назад

same process for an hpdi lower unit?

@wglgee1347 4 года назад

Hello John, how difficult would it be to convert a 30” engine to a 25” engine is it just a matter of replacing the input shaft and removing the extender?

@geraldlacasse7986 3 года назад

You will also need to replace the shift shaft for a shorter one. GL

@johncerro7486 2 года назад

I have a 2018 Yamaha 200 HP the lower unit and engine holding bracket is Corroded we’re both need replace went to the outboard shop here in Oakland ca. No one has replacement parts not even Japan a new motor cost $20,000 plus I bought the the boat new it’s a 23 Ranger Tug any advise would be helpful thanks

@timothyberrian267 4 года назад

What is the need to pull up on drive shaft while pressing the plastic sleeve with metal cap on.

@ryangallagher3611 4 года назад

Timothy Berrian it pre loads the drive shaft. If you don’t you will here a knocking noise at idle and will go away with rpm increase.

@orelvys19 4 месяца назад

Good morning I have a mercury 2004 225 the same year that was made by Yamaha . If I want to order a lower unit which on do I order in all the f225 . I called boat. Net and they couldn’t tell me . Thank you in advance

@makoumbiurbain3890 Год назад

Hi dear I 'eed a training on yamaha gear box please let me know.

@marcoaurelio9879 3 года назад

boa tarde, nosso motor e um yamaha 60 2 t, a alavanca do comando do piloto esta passando direto frente e ré não trava em neutro, pode me indicar uma solução, desde ja agradeço.