How to service VST on Yamaha F150 outboard

detailed video showing vapor seperator service procedure on yamaha 150hp 4 stroke outboard.

[@danw5785]

Thank you for your video. Just serviced mine today. Learned a lot from your video.

[@maineboatguy]

Dan W glad it helped!! I'm new to making videos and the kind words make it all worth it!! Thank you!!

[@danw5785]

@@maineboatguy Guys like you make it easy for the rest of us to own boats.....What part of Maine? I've done a yearly trip to Great Pond in Belgrade. Love it up there. I always stop at Newicks on the way home.....

[@maineboatguy]

Dan W I'm right in Waterville, so only a few minutes from Belgrade, I've got quite a few customers on Great Pond.

[@danw5785]

@@maineboatguy Holy cow, thats close.

[@paulhinton798]

Thank you!! I serviced mine today first time ever while floating in the slip. You made it easy

[@jjducharme1]

I was finally able to do this to my F150 along with the water pump. I was this easy and it was as stated "everything pretty much falls back into place". My motor is a 2004. The only difference is that I cleaned my own injectors and replaced the micro filter baskets. I believe that these were the problem. Very easy to do. Now if we had some open water, it's still winter here. Thank you, it was a HUGE HELP!

[@apackwestbound5946]

Thank you for the great video on servicing the VST and for giving us a front row seat watching you apply professional expertise and experience. - Respectfully

[@jasoncharbonneau9235]

Awesome video!!! I cant wait for the "how to replace a track on a 92 exciter" video coming this winter....

[@maineboatguy]

Haha! Sounds like a plan!

[@skunkedagain]

Great video. I’m doing mine today and step by step video is great! Thanks for sharing!

[@rickfaulkner7862]

Great video on servicing the VCT tank as I have the same engine and have to replace a dead high pressure pump in the VCT housing. Wondering if you made a video on cleaning the injectors. Thank you again!

[@maineboatguy]

Sorry I have not done an injector cleaning video yet. I use a “motion pro” injector cleaner with “crc qd electrical cleaner”. Also you’ll want to replace the filters in the injectors if you feel you’ve got contamination past the high pressure pump filter.

[@Nudnik1]

Excellent we just fixed same motor in the Bahamas water dirt in fuel rail. Runs now but need to do VST. No one here knows how to do that. We will use your video. Thanks

[@davidlong2048]

Each injector has a filter basket, that was issue on my 150

[@etothelij]

Sweet video. I actually removed all the throttle body/backside intake bolts first, then did the shround/box on the front side. I was able to get my VST out without having to pull the manifold entirely, so that was nice

[@chunkyfather29]

You the man, Thanks a mill for showing us how to make it happen

[@BusterNorway]

Great informative video. You know your stuff, and works nice and steady. Thanks.

[@brianoberlies526]

Great video! You made it look easy, but i know it takes alot of patience and like you said take plenty of pics. Many thanks.

[@maineboatguy]

Brian Oberlies after doing so many it seems easy! Absolutely patience the first time, nothing worse that having to take it back apart again! Good luck! Thanks for watching!

[@cesardacosta6254]

Well done. Informative down to the point Thank you for sharing

[@TripGibson]

Thank you for the video hopefully I don't have to get into this but if I do I know how it goes. My only complaint is hard to hear you. Maybe either speak a little louder or get a better mike would be very helpful for us old mechanics that have trouble hearing as it is.

[@Volfan812]

My 2006 Yamaha F150 is running rough at idle, won't plane. I've already checked for water in the fuel at both the engine fuel filter as well as the fuel water separator as well as relaced the fuel water separator and the spark plugs. No change so I downloaded the Yamaha diagnostic software and ordered the cable to connect the laptop to the engine. No codes. I think this service is my next step but I don't think I want to tackle this myself. Can you give me a ball park of how much that service you just did might cost?

[@joewinkler2168]

Really nice that ya show pictures, because we cant hear what your saying

[@angelustammaro8303]

Awesome vid. Question...if you don't mind...I acquired a boat with this motor on it. Prior owner had a dealer in Maine repair it due to bad gas including salt water in the fuel. Motor has only 50 hours. After all repairs including replacing seized VST and all filters the motor ran ok but when tilting the motor up after running about a cup of gas poured out of the air filter housing. Is the likely culprit that needle valve under the float not seating properly? I'm thinking salt could have corroded the needle or dried out the rubber seal? Not sure why they didn't replace it when they had it open. When I called the dealer to complain they said they don't ever have to change them and never replace them as part of maintenance. I wasnt surprised to hear you say that you would replace it while in there...I personally would have changed everything including the float components if I knew salt was in the system. Now I have a different marina looking at it because the boat is no longer in Maine. I would have done it myself but didn't find your video till it was too late. Anything else you might replace while in there?

[@svopus]

Thank you for the video. This is useful. Tell me, please, how much does all this work cost?

[@joanne737]

I pulled out the VST tank to check the needle and seat. Needle seemed to look just fine. Then I unscrewed the piece that holds the seat in place. After doing so I turned the top over and the seat just fell right out. Looking at it closer it looked just fine along with the o ring on it. When placing the seat back in the top of tank it just fell in place, again turning the cover the seat again just fell out. Seems to me like sloppy tolerances the way the seat does not seal at all even with the o ring in place. I placed the needle in the seat and blew on it without putting it back in the cover. It seals just fine. All the leakage seems to be by-passing the o-ring. I've been a technician all my life and this just doesn't seem right? Looks like all I need to do is replace the o-ring with one that seals properly. Lot of work to replace just an o-ring that should never fail. Ever come across this?

[@maineboatguy]

@@joanne737 it’s not a common occurrence but seems like some fuels make the o rings shrink and some fuels make the o rings swell up. I don’t recall having it happen in a VST but have had plenty of them do that in carburetors.

[@jjducharme1]

Thanks for doing this. I will be doing it in the spring to my 150TLRC. Holy Crap 36:03!!!!!!!!!!!

[@maineboatguy]

Hope it helps! If you have any questions when you're doing it feel free to ask away! Take lots of pictures while disassembling!

[@jjducharme1]

My brother came up with a great idea for disassembly, cover a folding table with butcher paper or something similar and mark parts, notes, amounts, diagrams and other info with a sharpe on the paper along with pics. Swear to god thats the best idea he ever had.

[@maineboatguy]

@@jjducharme1 that is a great idea!!!

[@jayswildride178]

that's everything I needed to know. thanks for the vid

[@jarvisvannorman2933]

What cleaner do you use when you were spraying out the vst. Thanks and great video.

[@davidlong2048]

I wish u had video of how to troubleshoot the high pressure fuel pump

[@edwardarmstrong6416]

Was filter and pump housing clean and free of plack.

[@matthewcelania6297]

Very good info... Thanks

[@rednoize4391]

excellent video thank you very much

[@grifg8037]

How much fuel does the VST tank hold? Looks like about 8 OZ.

[@kolbyhumbert2680]

Do you have the torque specs by chance?

[@1214Oyey]

What a great video, THANK YOU! By chance do you have a vid on removing and cleaning the fuel injectors?

[@maineboatguy]

Jason Neve sorry I haven’t done one on injectors yet (I don’t think) but I typically just remove them and send to “fuel injector man” in Florida for a professional cleaning. There are just 2 screws and the fuel line holding the fuel rail and injectors on. Pretty straight forward but I’ll try to get a video up on that ASAP!

[@melloreel]

What year motor is this? I’ve seen about 3 different types of VST removals and each was different depending on year? Thanks.

[@maineboatguy]

Melloreel this is a 2004

[@melloreel]

Maine Boat Guy thanks from Georgia👍 Mine is a 2006 so different setup.

[@waynewalleye8458]

what are the common issues with the 2019 f150 ?

[@jeeplove_8831]

What do you use for part numbers? I bought the Service manual from my Yamahaf150 and doesn't list any, I was disappointed 😔.

[@maineboatguy]

Best thing to do is get on boats.net or simyamaha and use their parts lookup with your model and serial numbers to make sure you’re getting the correct parts.

[@jeeplove_8831]

@@maineboatguy thanks! 🙏

[@russellavocato2598]

is this pretty much the same for the F115?

[@lazylazy1536]

Thank You Thank You Thank You Did my and problem fix Thanks

[@BroadBillHunter]

how often of hours do you do this for the f150s

[@maineboatguy]

BroadBill Hunter Yamaha recommends every 3 years or 300 hours when using ethanol fuel.

[@bobloshek713]

@@maineboatguy What if you use ethanol-free fuel? How many hours then? Thanks!

[@maineboatguy]

@@bobloshek713 not sure how much of a difference that will make. Fuel filters should be changed just as often even with non ethanol fuel. But that’s just my opinion. Using non ethanol fuel will help you avoid running issues and damage to fuel system caused by “phase separation” but it doesn’t stop typical debris that the filters are catching.

[@bobloshek713]

@@maineboatguy Thank you for your response!

[@michaelcarton3299]

What is the clear plastic hose on the bottom of the vst for? Does it go anywhere?

[@maineboatguy]

It is a drain hose for the VST, it just sits in the cowling

[@michaelcarton3299]

@@maineboatguy thank you! I spent so much time looking where to connect it. I'm getting a strong fuel odor when I shut down the engine. Thought it was this. 2008 Yamaha 115.

[@jjducharme1]

So after doing this I found out I have to replace the balancer. It's a 2004 never replaced. How hard is it to do this. There are no videos out there on this repair. Thanks

[@maineboatguy]

It's really not a hard job at all, I would recommend a service manual or LIT-18865-01-08 manual for instructions. You'll need to set timing at top dead center and have the correct torque wrench, also make sure you have an anaerobic sealant for reassembly. I don't have any videos on that at the moment. Sorry I couldn't help more!

[@jjducharme1]

Thank you. I think I can do this and you've been a big help. I finally got the boat to open water after the filters were replaced...47mph..wow!

[@maineboatguy]

@@jjducharme1 awesome! Glad to hear it!

[@fishydubsfishing6516]

I think I would be more concerned about where the waters coming from into the fuel

[@svopus]

what state do you work in?

[@Robiko9]

What are symptoms of the motor that the vst needs replacing?

[@maineboatguy]

VST service is preventative maintenance, almost like doing a "tune up" but any sort of running issues would indicate its time to at least clean and inspect.

[@micnguyen2864]

About how much does this service cost with injectors and vst filters

[@maineboatguy]

Depending on exact labor rate you could be $300-400 and even higher depending where you’re located.

[@shabutir1820]

Your being too loud. I can still hear you.

[@williamwest5827]

Nice work and detailed sufficiently. However, Yamaha should be ashamed that their engineering stinks, in so much as the level of effort and amount of work that’s needed to get to a simple filter replacement. Bad design and limited concern for the end user.

[@themtchannel2110]

A1 :)

[@bradleyplourde5394]

Great videos, very informative. Is there a way I can get a contact ph#, Ive got a few questions to ask?

[@maineboatguy]

Bradley Plourde shoot me an email [e-mail]

[@rafaelmecanica5670]

Q se tradusca en español

[@donpetrey8007]

While you are they check that counter balance. I bet the gears are blown. That’s an expensive fix.