How an Outboard Lower Unit Works | How an Outboard Gearbox Works | Boats.net

Автокөліктер мен көлік құралдары

How does a boat transmission work? In this video from Boats.net, Garrett will use our lower unit cutaway to show you precisely how the gearbox works in your outboard. He’ll take you on a tour of the lower unit from the drive shaft, through the water pump, and into the gearbox where you’ll see how power is transferred from your motor to the water.
See the lower unit diagram for a Yamaha F225 here: www.boats.net/catalog/yamaha/...
Read more here: www.boats.net/blog/outboard/l...
VIDEO HIGHLIGHTS
Drive shaft - 0:30
Water pump - 1:00
Shift shaft - 2:40
Gearbox cutaway - 3:00
Lower unit seals - 7:30
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Пікірлер: 227

  • @barrymullan6363
    @barrymullan63633 жыл бұрын

    As a novice boater, this was an amazingly useful video. Very well explained.

  • @user-cl2ls7kz7o
    @user-cl2ls7kz7o3 жыл бұрын

    Very nice. I finally found a video the actually teaches me something about something. Every other channel is about selling something with only pointing out the obvious.

  • @yam9635

    @yam9635

    2 жыл бұрын

    KZreads the place to go

  • @cemyanikk
    @cemyanikk Жыл бұрын

    I am a marine engineer and I learns too much good knowledges from your channel. Thank you so much.

  • @DAlilbigman
    @DAlilbigman3 жыл бұрын

    Very detailed n thorough! Thanks I love the way you have the areas cut out so I can easily see n understand all working parts. Awesome!

  • @apackwestbound5946
    @apackwestbound59464 жыл бұрын

    incredible well explained and produced video. Thank you for another quality product. I have no idea how anybody could "dislike" this video. Thank you!

  • @jenniferday1481

    @jenniferday1481

    5 ай бұрын

    Q0

  • @joseascensao4200
    @joseascensao42003 жыл бұрын

    Brilliant. Very informative, precise and concise. Thank you.

  • @frederickshandley5408
    @frederickshandley54084 жыл бұрын

    Great job clear voice and nice detail. The cut away view is fantastic

  • @KenH737
    @KenH7374 жыл бұрын

    Great explanation of lower unit basics.

  • @jarredburns8421
    @jarredburns84213 жыл бұрын

    Awesome video. Very detailed and informative. Thanks.

  • @roytaylor3857
    @roytaylor38572 жыл бұрын

    Finally a video that actually makes perfect sense 👌

  • @josephomalley6650
    @josephomalley66502 жыл бұрын

    This guy did an amazing job on this video! Well done!

  • @nikkibiondo7399
    @nikkibiondo7399 Жыл бұрын

    Thank you for explaining this so well

  • @JohnZamrok
    @JohnZamrok9 ай бұрын

    New to outboards. Great instruction!! I "saved" it for future maintenance. Thanks

  • @davestavers-pj6el
    @davestavers-pj6el Жыл бұрын

    Thank you- very clear straightforward lesson, you are an excellent teacher,

  • @pashkoskoda3862
    @pashkoskoda38623 жыл бұрын

    Very nice video. very clear and informative. Thank you for sharing.

  • @allanthomson4639
    @allanthomson46394 жыл бұрын

    thank you - any chance you could consider showing the basic steps+using the "setting plate concept" to setting/inserting the correct shims to take up the pinion+F+R gear for optimum tolerances, good clear explanation - watched from South Africa

  • @richardhealey9399
    @richardhealey93992 ай бұрын

    Great video, lots of good information!

  • @grcooley
    @grcooley3 жыл бұрын

    Very helpful, thanks!

  • @acetech9237
    @acetech92372 жыл бұрын

    You're a fantastic instructor

  • @albertkofi9383
    @albertkofi93832 жыл бұрын

    I love your explanation sir. Thank you

  • @augustinepora4436
    @augustinepora4436 Жыл бұрын

    Clearly explain the lower unit. Awesome

  • @globalfunseeker6733
    @globalfunseeker6733Ай бұрын

    Terrific video. Very informative and simple to understand. Thanks.

  • @octane_6327
    @octane_63273 жыл бұрын

    Thanks for the vid! Learnt heaps

  • @joetart9905
    @joetart99053 жыл бұрын

    Awesome video. Very informative!

  • @tman2172
    @tman21722 жыл бұрын

    This video was so awesome for us novice boat owners. Great job!!!!

  • @BoatParts

    @BoatParts

    2 жыл бұрын

    Great! It was awesome for us to cut it apart.

  • @carbide72
    @carbide72 Жыл бұрын

    Superb video, high quality content, thank you

  • @hamnchee
    @hamnchee3 жыл бұрын

    Solid video thank you!

  • @MrCharleswr
    @MrCharleswr2 жыл бұрын

    Excellent explanation, nice job!

  • @rossnolan5659
    @rossnolan56592 жыл бұрын

    Super helpful, thanks!

  • @jamesjannell8706
    @jamesjannell8706 Жыл бұрын

    You guys are awesome. Thx for the education.

  • @cooperstownnyrealestate
    @cooperstownnyrealestate3 жыл бұрын

    Great explanation thank you!!

  • @WalwRafii
    @WalwRafii3 жыл бұрын

    Great video, thanks!

  • @15569903
    @1556990311 ай бұрын

    This was a really great video. You guys rock!

  • @bears198542021
    @bears198542021 Жыл бұрын

    Great vid. Thank you!

  • @phillipesch7556
    @phillipesch75566 ай бұрын

    Amazing video thanks!

  • @ipuketshirts
    @ipuketshirts10 күн бұрын

    Extremely clear. Well done video. Would be good to know variances from freshwater to salt for seals etc given environmental factors for maintenance schedules.

  • @martinkoche4375
    @martinkoche43752 жыл бұрын

    Thank you sir very informative and helpful video

  • @ImFishHead
    @ImFishHead4 жыл бұрын

    Well done!

  • @markmurphy137
    @markmurphy1377 күн бұрын

    Man excellent video thank you sir

  • @dylanlangston6668
    @dylanlangston6668Ай бұрын

    simple and straight forward

  • @brianl.3047
    @brianl.30474 жыл бұрын

    I've always been automotive-oriented. My wife and I inherited a 1963 Starcraft a couple years ago with a 1994 Johnson 48 SPL. After a comprehensive online boating class, we became boaters. I'm trying to get up to speed on outboards, particularly in regards to routine maintenance. This video was VERY educational. Outstanding presentation.

  • @jimmyadams9257

    @jimmyadams9257

    4 жыл бұрын

    Installing new lower unit on a Yamaha 70etlh 1986 having trouble with shifter going in reverse on in forward very quickly. The shifter is in natural and the lower unit is also in natural what am I missing with the reverse problem

  • @wxmyjnsn
    @wxmyjnsn3 жыл бұрын

    This was fantastic.

  • @TheSevillap
    @TheSevillap5 ай бұрын

    Such a great video bud. Well explained.

  • @pawfan
    @pawfan Жыл бұрын

    Thanks for sharing how the lower unit works. I was curious on how it really works.

  • @richardatyeo9903
    @richardatyeo99033 жыл бұрын

    Very good presentation.

  • @grndhg86d
    @grndhg86d Жыл бұрын

    Excellent video thank you

  • @robertmalvarez4582
    @robertmalvarez45823 жыл бұрын

    AWESOME INFORMATION

  • @Leblueskee
    @Leblueskee3 ай бұрын

    Thank you so much for this. I'm building an electric boat motor and this was so helpful.

  • @purplefurture6960
    @purplefurture69609 ай бұрын

    such amazing video that let noob like me understand things i wouldnt ever think i will be able to know

  • @stevenstreet9754
    @stevenstreet97543 жыл бұрын

    Very good information.

  • @jameshalstead237
    @jameshalstead2374 жыл бұрын

    NICE JOB WELL SPOKEN

  • @hobiehollister951
    @hobiehollister9513 жыл бұрын

    Very informative

  • @trevortaliana5944
    @trevortaliana59443 жыл бұрын

    great video!

  • @alstonshipp9240
    @alstonshipp92406 ай бұрын

    Good explanation!

  • @leesmith5419
    @leesmith5419 Жыл бұрын

    Excellent tutorial

  • @stevew6141
    @stevew61413 жыл бұрын

    Thank you for this informative video! The cut away leg is brilliant👍🏻 It explains visually how a gearbox works and operates I recently bought a boat with very old unknown twin stern drives and twin 1.8 diesel Ford engines- so far I have found that engine 1. Crankshaft turns with prop In drive. engine 2. Crankshaft seized but prop in Neutral and turns! Both stern drive gear levers are stuck so do you think I’m looking at a loss or a project worth investing in? Are stern drives gears easy to unsieze? Thanks in advance for any advice

  • @danielboltz3635
    @danielboltz3635 Жыл бұрын

    Great video!

  • @Patriottoo2
    @Patriottoo22 жыл бұрын

    Well done, mate!

  • @tenexchikumba
    @tenexchikumba Жыл бұрын

    Keep teaching sir, it's great, class of mine

  • @chrishampson1394
    @chrishampson13944 жыл бұрын

    Wow. Great video and explanation showing the different components and functions! Thank you

  • @clmb511
    @clmb511 Жыл бұрын

    This was so helpful! Do it with a Verado someday?

  • @johnakagi1088
    @johnakagi1088 Жыл бұрын

    Great video that explains the seal points and the maintenance. I would be comfortable replacing the 6 seal point seals on the lower unit. Certainly replacing the water pump. Thanks.

  • @pino_7428
    @pino_74283 жыл бұрын

    Great video.

  • @kenlow4028
    @kenlow40282 жыл бұрын

    Top gun marine mechanic, full of knowledge

  • @edy7951
    @edy79514 жыл бұрын

    Tq bro....🤝

  • @JoseHernandez-kl2wg
    @JoseHernandez-kl2wg2 жыл бұрын

    Great video 👍

  • @nicholasm2239
    @nicholasm22392 жыл бұрын

    great video.

  • @sgray1906
    @sgray19063 жыл бұрын

    Yall are Outstanding !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! :)

  • @matthewbudlong9813
    @matthewbudlong98132 жыл бұрын

    Nice job

  • @AutoDiag_
    @AutoDiag_3 жыл бұрын

    Thank you

  • @user-qy8xq3gv1w
    @user-qy8xq3gv1w8 ай бұрын

    Thank you for your love of sharing. Questions: any video for install inlet valve and exhaust valve spring valve and rocket arms. Thanks

  • @abrahamu5544
    @abrahamu55442 жыл бұрын

    thank you.

  • @bouldernelsonbigfoot
    @bouldernelsonbigfoot2 жыл бұрын

    great vid

  • @ash.133
    @ash.1333 жыл бұрын

    Very very nice 👍👍👍👍👍👍

  • @wofaideal5312
    @wofaideal53122 жыл бұрын

    Very good and well explained wish to work with u

  • @SaltyMechanicsJunior
    @SaltyMechanicsJunior2 жыл бұрын

    GREAT STUFF, MAN. JUST SUBBED 👍

  • @OUTBOARD_USK
    @OUTBOARD_USK4 жыл бұрын

    👍🏻👍🏻👍🏻

  • @larryklein7398

    @larryklein7398

    4 жыл бұрын

    Very nice informative video..Thanks

  • @TheFrank1423
    @TheFrank14235 ай бұрын

    Very good video 😂

  • @TheBluceRee
    @TheBluceRee3 жыл бұрын

    Before watching this, I barely knew the word lower unit meant. Now I feel like I could confidently tear a lower unit apart. Also am now able to diagnose many problems.

  • @geraldlacasse7986
    @geraldlacasse79863 жыл бұрын

    Great video! Since the reverse and forward gear are free on the prop shaft how can you hold them steady whille measuring the backlash? The clutch dog does not do that since the tooths are smaller than the ones they mesh on the gears. Thanks for your help..please help ! GL

  • @leonmaritz2598
    @leonmaritz25983 жыл бұрын

    I enjoy your video's....I would like to know if the gearbox drive shaft must be shimmed? Must the drive shaft have a play up and down ?

  • @dennisluce2056
    @dennisluce20562 жыл бұрын

    Such a great video for a novice like me! I hit a stump recently with my Merc 90 - and I have a little water leaking out just above where my Transom saver holds the motor - If there's no water in my gear lube I should be able to JB Weld that spot right?

  • @xelintuttle7581
    @xelintuttle75813 жыл бұрын

    i would like to see a video on replacing the shift cam

  • @williamlillie9309
    @williamlillie93093 жыл бұрын

    How do you keep your shims in place while installing the bearing carrier? Could I use a thin coating of grease or oil? I own a 1970 mercury 40hp 400 and I am in winnipeg Manitoba Canada watching this video. Great explanation and video.

  • @clarencesail
    @clarencesail3 жыл бұрын

    Really great explanation of the system. Thank you.

  • @georgeatallah1926
    @georgeatallah19263 жыл бұрын

    Great job very clear video and voice.my Yamaha 115 four stroke 2002 model has a whining noise when travelling about 15-20 kmh noise goes away at higher speeds.otherwise motor runs perfect,can you suggest anything thanks!

  • @billyphantha
    @billyphantha3 жыл бұрын

    Very good video, Garrett is a very good teacher.

  • @Guerrero1187
    @Guerrero11873 жыл бұрын

    I don’t understand how people dislike these informational videos?? Some people just hate their life. I think it’s a great video,keep up the great work and content 👍🏼🙏

  • @Pre-Unit_Triumph
    @Pre-Unit_Triumph3 жыл бұрын

    @Boat Parts Thanks, got it great video. Does the older (1974 Mercury) gearbox shifter work the same? i.e. To select reverse shift splines "clockwise & forward counter clockwise"?? The older Mercs have a sloped cam that goes over the splines. In which position must the spline selector be (forward, neutral or reverse) and at what rotation must the sloped edge of the cam be when fitting the cam? Not sure if this makes any sense. Your help will be greatly appreciated, thanks. Forgot to ask if the cables should be disconnected & if the power dead throttle cable position should be in the same position at the spline selector i.e. forward, neutral or reverse?? NB. This is a replacement motor. Thanks.

  • @dkurth53
    @dkurth534 жыл бұрын

    My Yamaha 2011 175hp, I bent my prop shaft.With the bearing housing out can I pull the prop shaft out and preplace with a new one ?

  • @TheDuffman1986
    @TheDuffman198611 ай бұрын

    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?

  • @willysoriano4196
    @willysoriano41967 ай бұрын

    good evening Do you have a video explaining how to reinstall trim sender on a Suzuki DT85?

  • @Whisbaby1Vr
    @Whisbaby1Vr Жыл бұрын

    Great video. TryIng to figure out why my Yamaha 4 stroke making a howling noise and bugs out once in gear in the water

  • @ihahahuhu3159
    @ihahahuhu31594 жыл бұрын

    good video bro.., what is the gear ratio ?

  • @DT-ob6ce
    @DT-ob6ce2 жыл бұрын

    I would love to see a breakdown of an '82 Mercury Outboard

  • @niaddaize7357
    @niaddaize73574 жыл бұрын

    Do a cutaway video on a lower case unit gearbox for a counter rotate(Left handed propeller) outboard engine please

  • @russellfisher5710
    @russellfisher5710 Жыл бұрын

    Great video, so I have replaced the impeller and now when I put it back together I cannot select the forward/reverse neutral properly from the control. I have selected neutral and put the lower unit back together but when I then try and select the gears via the controller it will go from neutral the reverse and back to neutral but not into forward. I did not touch the gear selector when I replaced the impeller and it was all good before the impeller change. It s a good engine in tip top condition and been well maintained and also not thrashed as it was a sailing club engine that a won in a sealed bid auction.

  • @PureLivingForOutdoors
    @PureLivingForOutdoors Жыл бұрын

    I need you all to rebuild a Mercury Pro XS 250 Torquemaster lower on video! LOL

  • @jordanking905
    @jordanking9054 жыл бұрын

    Is there a hose or something that hooks up to the tube. I’m new just trying to figure out how it works

  • @sonus3306
    @sonus33063 жыл бұрын

    I would like to know how the thrust from the prop is transferred through the drive shaft to the body of the boat? Is there a thrust plate somewhere in the system as there is in ships?

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